{"schema":"lookcloser/record@0.2","compatible_with":["lookcloser/record@0.1"],"record_id":"lc-058facdb","processing":{"collection_process_version":"2026-07-24.5","last_collected_at":"2026-07-27T14:47:50-0700","last_collection_event":"intake","label_reader_version":"2026-07-27.1","report_schema":"lookcloser/record@0.2","rendered_at":"2026-07-27T17:28:34-0700"},"analysis_status":"complete","processing_gaps":[],"gtin":null,"listing_identifier":"B0007PLP0W","brand":"21st Century","title":"21st Century Sentry Senior Tablets, 265 Count","listing_title":"21st Century Sentry Senior Tablets, 265 Count","identity":{"canonical_gtin":null,"source_listing_gtin":null,"listing_identifier":"B0007PLP0W","product_image":"https://m.media-amazon.com/images/I/71Z4WNCI6FL.jpg","product_image_status":"retained","product_image_provenance":{"status":"retained","source":"source_listing","identity_basis":"exact_listing_identifier","source_url":"https://www.amazon.com/dp/B0007PLP0W","primary_url":"https://m.media-amazon.com/images/I/71Z4WNCI6FL.jpg","image_count":8,"last_attempted":"2026-07-27T14:47:50-0700","attempts":1},"observed_at":"2026-07-27","source_confirmations":[],"brand_consistency":{"status":"product_line","compatible":true,"listing_brand":"21st Century","package_brand":"Sentry","match_method":"package_brand_terms_in_exact_listing","similarity":0.7059},"identity_rule":"exact identifiers only; related products are never substituted"},"trademark_owner":null,"trademark_owner_candidates":[{"name":"Twenty-First Century Laboratories, Inc.","entity":"CORPORATION","country":"ARIZONA, USA","address_filed":"2119 South Wilson Street, Tempe, ARIZONA 85282, UNITED STATES","address_public":"ARIZONA 85282, UNITED STATES","serial_number":"76694514","registration_number":"3645342","wordmark":"21ST CENTURY","status_description":"REGISTERED AND RENEWED","filed_date":"2008-11-28T00:00:00","first_use_commerce_date":"1991-09-21","registration_date":"2009-06-30","assignment_recorded":true,"goods_services":["IC 005: vitamins, mineral supplements, dietary supplements, nutritional supplements, weight loss supplements, herbal supplements, herbal teas for weight loss, vitamins for pets, nutritional supplements for pets, dietary supplements for pets, and herbal supplements for pets."],"source":"USPTO Trademark Search","source_url":"https://tsdr.uspto.gov/#caseNumber=76694514&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch","identity_basis":"exact_wordmark_and_supplement_goods"},{"name":"Twenty-First Century HealthCare, Inc.","entity":"CORPORATION","country":"ARIZONA, USA","address_filed":"443 West Alameda Drive, Tempe, ARIZONA 85282, UNITED STATES","address_public":"ARIZONA 85282, UNITED STATES","serial_number":"76707461","registration_number":"4085491","wordmark":"21ST CENTURY","status_description":"REGISTERED AND RENEWED","filed_date":"2011-05-02T00:00:00","first_use_commerce_date":"2008-06-04","registration_date":"2012-01-17","assignment_recorded":false,"goods_services":["IC 005: Vitamins; mineral supplements; dietary supplements; nutritional supplements; herbal supplements [ ; weight loss supplements; vitamins for pets; nutritional supplements for pets; dietary supplements for pets; herbal supplements for pets; food supplements for pets; ear drops for pets; ear cleaning pads for pets impregnated with medicated skin care cleaners; ear preparations in the nature of medicated powders for pets to eliminate odor and to relieve itching and irritation; first aid kits for pets; self-adhering flexible bandages for pets; pain relief medication for pets; medicated pet shampoo; anti-itch preparations for pets, namely, medicated sprays, powders, lotions and shampoo; medicated lotions and pads to remove tear and saliva stains from the coats of pets; styptic preparations, namely, powders, for pets; and hydrocortisone preparations, namely, anti-itch lotions, sprays and shampoo, for pets ]."],"source":"USPTO Trademark Search","source_url":"https://tsdr.uspto.gov/#caseNumber=76707461&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch","identity_basis":"exact_wordmark_and_supplement_goods"},{"name":"Twenty First Century Nutritional Products, Inc.","entity":"CORPORATION","country":"ARIZONA, USA","address_filed":"2445 West 12th Street, Tempe, ARIZONA 85281, UNITED STATES","address_public":"ARIZONA 85281, UNITED STATES; ARIZONA 85282, UNITED STATES","serial_number":"74350049","registration_number":"1790110","wordmark":"21ST CENTURY","status_description":"REGISTERED AND RENEWED","filed_date":"1993-01-21T00:00:00","first_use_commerce_date":"1992-12-11","registration_date":"1993-08-31","assignment_recorded":true,"goods_services":["IC 005: vitamins, herbal remedies and nutritional supplements."],"source":"USPTO Trademark Search","source_url":"https://tsdr.uspto.gov/#caseNumber=74350049&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch","identity_basis":"exact_wordmark_and_supplement_goods"}],"trademark_owner_status":"multiple","product_manufacturer_link":"not_established","label_responsible_parties":[],"identity_nodes":[],"seller_of_record":null,"seller_of_record_status":"not_collected_founder_gated","consumer_view":{"template":"claim_question","kicker":"The useful read","headline":"FDA recall appears in this brand's history","deck":"An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.","display_mode":"single_home_per_finding","finding_ids":["fda-public-records-fda-recall-appears-in-this-brand-s-history","certification-laboratory-record-testing-claimed-documentation-not-found","uspto-trademark-registry-multiple-uspto-brand-owner-records-are-shown","nih-published-research-each-ingredient-s-amount-is-disclosed","nih-published-research-research-context-is-available-for-the-listed-ingr","review_velocity_gradual"],"point_finding_ids":["fda-public-records-fda-recall-appears-in-this-brand-s-history","certification-laboratory-record-testing-claimed-documentation-not-found","uspto-trademark-registry-multiple-uspto-brand-owner-records-are-shown"],"cards":[{"finding_id":"fda-public-records-fda-recall-appears-in-this-brand-s-history","card_type":"fda_recall","question":"safety","tone":"warn","weight":96,"headline":"FDA recall appears in this brand's history","evidence":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st…”","so_what":"An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.","source":"FDA public records","source_links":[],"registry_receipts":[{"source":"openfda_search","url":"https://api.fda.gov/food/enforcement.json?search=(recalling_firm:%2221st+Century%22+OR+product_description:%2221st+Century%22)&limit=5","label":"FDA enforcement search · 21st Century","registry_name":"FDA enforcement","standard":null,"identifier":"21st Century"}],"evidence_id":"ev-53546e921077","evidence_url":"https://lookcloser.ai/e/ev-53546e921077","presentation_home":"finding_catalog"},{"finding_id":"certification-laboratory-record-testing-claimed-documentation-not-found","card_type":"testing_claimed_no_lab","question":"safety","tone":"warn","weight":80,"headline":"The observed listing says it is tested, but names no lab or certifier.","evidence":"The observed listing claims third-party testing without naming a lab or certifier. No product-bound report is retained, so the claim cannot be verified as stated. Under NSF/ANSI 173, NSF lists 21st Century HealthCare, Inc. …","so_what":"A testing badge without an issuer or report is a marketing claim, not evidence. Ask for the lab name and lot-specific report.","source":"Certification / laboratory record","source_links":[{"label":"Observed listing claim","url":"https://www.amazon.com/dp/B0007PLP0W","role":"claim surface"},{"label":"NSF/ANSI 173 registry","url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","role":"brand-level result · 21st Century HealthCare, Inc."}],"registry_receipts":[{"source":"nsf_search","url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","label":"NSF/ANSI 173 · 21st Century HealthCare, Inc.","registry_name":"NSF","standard":"NSF/ANSI 173","identifier":"21st Century HealthCare, Inc."}],"evidence_id":"ev-7a180109a8ee","evidence_url":"https://lookcloser.ai/e/ev-7a180109a8ee","presentation_home":"claim_scorecard"},{"finding_id":"uspto-trademark-registry-multiple-uspto-brand-owner-records-are-shown","card_type":"owner_candidates","question":"owner","tone":"neutral","weight":54,"headline":"Registered owner records: Twenty-First Century Laboratories, Inc. · Twenty-First Century HealthCare, Inc. · Twenty First Century Nutritional Products, Inc.","evidence":"USPTO returned multiple live supplement-class records for the exact brand wordmark: Twenty-First Century Laboratories, Inc., Twenty-First Century HealthCare, Inc., Twenty First Century Nutritional Products, Inc.. …","so_what":"The public ownership record is ambiguous. We show the exact candidates instead of choosing one by name similarity.","source":"USPTO trademark registry","source_links":[],"registry_receipts":[{"source":"uspto_search","url":"https://tsdr.uspto.gov/#caseNumber=76694514&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch","label":"USPTO · Registrations 3645342, 4085491, 1790110","registry_name":"USPTO","standard":null,"identifier":"Registrations 3645342, 4085491, 1790110"}],"evidence_id":"ev-ad2416d0d336","evidence_url":"https://lookcloser.ai/e/ev-ad2416d0d336","presentation_home":"finding_catalog"},{"finding_id":"nih-published-research-each-ingredient-s-amount-is-disclosed","card_type":"amounts_disclosed","question":"label","tone":"ok","weight":50,"headline":"Every ingredient shows its amount · 25 ingredients listed.","evidence":"The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.","so_what":"Every ingredient shows its real amount — nothing is hidden in a proprietary blend.","source":"NIH / published research","source_links":[],"registry_receipts":[],"evidence_id":"ev-fa20229aafa6","evidence_url":"https://lookcloser.ai/e/ev-fa20229aafa6","presentation_home":"finding_catalog"},{"finding_id":"nih-published-research-research-context-is-available-for-the-listed-ingr","card_type":"research_available","question":"goals","tone":"neutral","weight":44,"headline":"Research links are available for magnesium, zinc.","evidence":"Published sources describe how magnesium, zinc have been studied. This is ingredient context only; the record does not establish that this product delivers the studied dose or outcome. Sources: NIH ODS — Magnesium fact sheet, PubMed search: magnesium glycinate supplementation.","so_what":"Use the linked research to check whether the ingredient and outcome you care about are actually connected. Ingredient evidence does not verify this product.","source":"NIH / published research","source_links":[{"label":"NIH ODS — Magnesium fact sheet","url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","role":"magnesium context · not product evidence"},{"label":"PubMed search: magnesium glycinate supplementation","url":"https://pubmed.ncbi.nlm.nih.gov/?term=magnesium+glycinate+supplementation","role":"magnesium context · not product evidence"},{"label":"NIH ODS — Zinc fact sheet","url":"https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/","role":"zinc context · not product evidence"},{"label":"PubMed search: zinc supplementation trial","url":"https://pubmed.ncbi.nlm.nih.gov/?term=zinc+supplementation+randomized","role":"zinc context · not product evidence"}],"registry_receipts":[{"source":"nih_ods_magnesium","url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","label":"NIH ODS — Magnesium fact sheet","registry_name":"NIH ODS","standard":null,"identifier":"magnesium"},{"source":"nih_ods_zinc","url":"https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/","label":"NIH ODS — Zinc fact sheet","registry_name":"NIH ODS","standard":null,"identifier":"zinc"}],"evidence_id":"ev-d3400873528d","evidence_url":"https://lookcloser.ai/e/ev-d3400873528d","presentation_home":"research_section"},{"finding_id":"review_velocity_gradual","card_type":"review_velocity","question":"reviews","tone":"ok","weight":28,"headline":"Reviews rose from 157 to 228 between July 14, 2025 and July 21, 2026 — no sudden jump.","evidence":"Written reviews rose from 157 to 228 between July 14, 2025 and July 21, 2026. The largest rise inside any single 30-day window was about 11, so the count moved in steps rather than in one burst.","so_what":"A count that moves steadily is ordinary. A sudden burst is what deserves a closer look.","source":"keepa","source_links":[{"label":"Keepa exact-listing history","url":"https://keepa.com/#!product/1-B0007PLP0W","role":"dated count history · exact listing"}],"registry_receipts":[],"evidence_id":"ev-c7d76e4e41ed","evidence_url":"https://lookcloser.ai/e/ev-c7d76e4e41ed","presentation_home":"finding_catalog"}],"research_links":[{"ingredient":"magnesium","label":"NIH ODS — Magnesium fact sheet","url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","scope":"ingredient_context","product_evidence":false},{"ingredient":"magnesium","label":"PubMed search: magnesium glycinate supplementation","url":"https://pubmed.ncbi.nlm.nih.gov/?term=magnesium+glycinate+supplementation","scope":"ingredient_context","product_evidence":false},{"ingredient":"zinc","label":"NIH ODS — Zinc fact sheet","url":"https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/","scope":"ingredient_context","product_evidence":false},{"ingredient":"zinc","label":"PubMed search: zinc supplementation trial","url":"https://pubmed.ncbi.nlm.nih.gov/?term=zinc+supplementation+randomized","scope":"ingredient_context","product_evidence":false}],"open_items":[]},"tldr":{"assessment":"checks_confirmed","headline":"FDA recall appears in this brand's history","summary":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st Century HealthCare, Inc., 2119 Wilson St., Tempe, AZ 85282”. FDA recorded the reason as “A small quantity of bottles of Vitamin D3 125 mcg ((5000 IU) 100 ct. were mislabeled as Vitamin D3 25 mcg (1000 IU). Secondary labeling on the bottles (back label) is correctly labeled as Vitamin D3 125 mcg (5000 IU)”. Verify at <a href=\"https://www.accessdata.fda.gov/scripts/ires/index.cfm\" rel=\"noopener\">FDA’s recall database</a>.","lead_finding_id":"fda-public-records-fda-recall-appears-in-this-brand-s-history","key_findings":[{"id":"nih-published-research-each-ingredient-s-amount-is-disclosed","class":"ok","headline":"Each ingredient’s amount is disclosed","source":"NIH / published research","scope":"ingredient_context"},{"id":"review_velocity_gradual","class":"ok","headline":"The review count moved gradually, not in one burst","source":"keepa","scope":"exact_listing"}],"documented_concern_count":0,"confirmed_check_count":2,"open_question_count":3,"usage_note":"Decision support, not medical advice or a product recommendation. Missing evidence is a gap, not a strike."},"origin_context":null,"verdict":{"state":"checks_confirmed","headline":"FDA recall appears in this brand's history","detail":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st Century HealthCare, Inc., 2119 Wilson St., Tempe, AZ 85282”. FDA recorded the reason as “A small quantity of bottles of Vitamin D3 125 mcg ((5000 IU) 100 ct. were mislabeled as Vitamin D3 25 mcg (1000 IU). Secondary labeling on the bottles (back label) is correctly labeled as Vitamin D3 125 mcg (5000 IU)”. Verify at <a href=\"https://www.accessdata.fda.gov/scripts/ires/index.cfm\" rel=\"noopener\">FDA’s recall database</a>.","lead_finding_id":"fda-public-records-fda-recall-appears-in-this-brand-s-history","meaning":"Finding-first decision support. Confirmed checks are not endorsements; cautions identify documented facts or bounded comparisons, not medical advice."},"public_verifiability":{"state":"insufficient_public_data","headline":"This product can't be verified from public data","detail":"Neither good nor bad — the checks below show what this listing publishes and what it withholds. Verifiable products publish more.","meaning":"Evidence availability only. Missing public data is a gap, never a strike."},"consistency_score":null,"findings":[{"id":"nih-published-research-each-ingredient-s-amount-is-disclosed","source":"NIH / published research","class":"ok","noted":false,"severity":"ok","weight":38,"headline":"Each ingredient’s amount is disclosed","detail":"The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.","proof":"The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.","identity_basis":"ingredient","status":"live","source_refs":["nih_ods_magnesium","nih_ods_zinc","pubmed_magnesium","pubmed_zinc"],"source_url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","scope":"ingredient_context","inference_level":"direct_observation","observed_at":"2026-07-27","presentation_tone":"ok","evidence_id":"ev-fa20229aafa6","evidence_url":"https://lookcloser.ai/e/ev-fa20229aafa6","content_fingerprint":"sha256:4690b3c6e89c906a0f0eede9e3db337e6227d32250d1022ec8f0519435bbd25d","registry_receipts":[],"evidence":{"summary":"The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.","source_refs":["nih_ods_magnesium","nih_ods_zinc","pubmed_magnesium","pubmed_zinc"],"source_records":[{"source":"nih_ods_magnesium","source_url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient","registry_name":"NIH ODS","identifier":"magnesium","receipt_label":"NIH ODS — Magnesium fact sheet"},{"source":"nih_ods_zinc","source_url":"https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient","registry_name":"NIH ODS","identifier":"zinc","receipt_label":"NIH ODS — Zinc fact sheet"},{"source":"pubmed_magnesium","source_url":"https://pubmed.ncbi.nlm.nih.gov/?term=magnesium+glycinate+supplementation","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient"},{"source":"pubmed_zinc","source_url":"https://pubmed.ncbi.nlm.nih.gov/?term=zinc+supplementation+randomized","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient"}],"observed_at":"2026-07-27","looked":"LookCloser checked NIH / published research.","found":"The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research."},"html_anchor":"finding-nih-published-research-each-ingredient-s-amount-is-disclosed","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-nih-published-research-each-ingredient-s-amount-is-disclosed"},{"id":"uspto-trademark-registry-multiple-uspto-brand-owner-records-are-shown","source":"USPTO trademark registry","class":"gap","noted":false,"severity":"pend","weight":23,"headline":"Multiple USPTO brand-owner records are shown","detail":"USPTO returned multiple live supplement-class records for the exact brand wordmark: Twenty-First Century Laboratories, Inc., Twenty-First Century HealthCare, Inc., Twenty First Century Nutritional Products, Inc.. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open.","proof":"USPTO returned multiple live supplement-class records for the exact brand wordmark: Twenty-First Century Laboratories, Inc., Twenty-First Century HealthCare, Inc., Twenty First Century Nutritional Products, Inc.. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open.","identity_basis":"owner_exact","status":"live","source_refs":["uspto_search"],"source_url":"https://tsdr.uspto.gov/#caseNumber=76694514&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch","scope":"brand_owner","inference_level":"gap","observed_at":"2026-07-27","presentation_tone":"gap","evidence_id":"ev-ad2416d0d336","evidence_url":"https://lookcloser.ai/e/ev-ad2416d0d336","content_fingerprint":"sha256:7cba5f68d45b5f4d074f728ffad8b6d83fa5eb28a988cd70658f7c65bb4ce52c","registry_receipts":[{"source":"uspto_search","url":"https://tsdr.uspto.gov/#caseNumber=76694514&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch","label":"USPTO · Registrations 3645342, 4085491, 1790110","registry_name":"USPTO","standard":null,"identifier":"Registrations 3645342, 4085491, 1790110"}],"evidence":{"summary":"USPTO returned multiple live supplement-class records for the exact brand wordmark: Twenty-First Century Laboratories, Inc., Twenty-First Century HealthCare, Inc., Twenty First Century Nutritional Products, Inc.. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open.","source_refs":["uspto_search"],"source_records":[{"source":"uspto_search","source_url":"https://tsdr.uspto.gov/#caseNumber=76694514&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch","observed_at":"2026-07-27","identity_basis":"exact_wordmark_and_supplement_goods","scope":"brand","registry_name":"USPTO","identifier":"Registrations 3645342, 4085491, 1790110","receipt_label":"USPTO · Registrations 3645342, 4085491, 1790110"}],"observed_at":"2026-07-27","looked":"LookCloser checked USPTO trademark registry.","found":"USPTO returned multiple live supplement-class records for the exact brand wordmark: Twenty-First Century Laboratories, Inc., Twenty-First Century HealthCare, Inc., Twenty First Century Nutritional Products, Inc.. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open."},"html_anchor":"finding-uspto-trademark-registry-multiple-uspto-brand-owner-records-are-shown","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-uspto-trademark-registry-multiple-uspto-brand-owner-records-are-shown"},{"id":"certification-laboratory-record-testing-claimed-documentation-not-found","source":"Certification / laboratory record","class":"gap","noted":true,"severity":"pend","weight":23,"headline":"Testing claimed — documentation not found","detail":"The observed listing claims third-party testing without naming a lab or certifier. No product-bound report is retained, so the claim cannot be verified as stated. Under NSF/ANSI 173, NSF lists 21st Century HealthCare, Inc. products, but the retained registry result does not cover this exact SKU. IFOS, USP, and Informed-Sport were not checked in this record.","proof":"The observed listing claims third-party testing without naming a lab or certifier. No product-bound report is retained, so the claim cannot be verified as stated. Under NSF/ANSI 173, NSF lists 21st Century HealthCare, Inc. products, but the retained registry result does not cover this exact SKU. IFOS, USP, and Informed-Sport were not checked in this record.","identity_basis":"none","status":"live","source_refs":["nsf_search","source_listing"],"source_url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","scope":"search_scope","inference_level":"gap","observed_at":"2026-07-27","presentation_tone":"gap","evidence_id":"ev-7a180109a8ee","evidence_url":"https://lookcloser.ai/e/ev-7a180109a8ee","content_fingerprint":"sha256:439c7fae5d6bb42fd639dae7e0d503443429a622bc6ccf68bc3887be74054cbb","registry_receipts":[{"source":"nsf_search","url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","label":"NSF/ANSI 173 · 21st Century HealthCare, Inc.","registry_name":"NSF","standard":"NSF/ANSI 173","identifier":"21st Century HealthCare, Inc."}],"evidence":{"summary":"The observed listing claims third-party testing without naming a lab or certifier. No product-bound report is retained, so the claim cannot be verified as stated. Under NSF/ANSI 173, NSF lists 21st Century HealthCare, Inc. products, but the retained registry result does not cover this exact SKU. IFOS, USP, and Informed-Sport were not checked in this record.","source_refs":["nsf_search","source_listing"],"source_records":[{"source":"nsf_search","source_url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","observed_at":"2026-07-27","identity_basis":"company_brand","scope":"product_or_brand","registry_name":"NSF","standard":"NSF/ANSI 173","identifier":"21st Century HealthCare, Inc.","receipt_label":"NSF/ANSI 173 · 21st Century HealthCare, Inc."},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","looked":"LookCloser checked Certification / laboratory record.","found":"The observed listing claims third-party testing without naming a lab or certifier. No product-bound report is retained, so the claim cannot be verified as stated. Under NSF/ANSI 173, NSF lists 21st Century HealthCare, Inc. products, but the retained registry result does not cover this exact SKU. IFOS, USP, and Informed-Sport were not checked in this record."},"html_anchor":"finding-certification-laboratory-record-testing-claimed-documentation-not-found","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-certification-laboratory-record-testing-claimed-documentation-not-found"},{"id":"label-and-serving-arithmetic-multi-ingredient-formula-panel-read-serving","source":"Label and serving arithmetic","class":"gap","noted":false,"severity":"info","weight":22,"headline":"Multi-ingredient formula — panel read, serving weight unknown","detail":"We read the full Supplement Facts panel from the listing-image panel (below), but the label doesn’t state a serving weight, so the arithmetic can’t run. A gap in the label’s information, not evidence of a problem.","proof":"We read the full Supplement Facts panel from the listing-image panel (below), but the label doesn’t state a serving weight, so the arithmetic can’t run. A gap in the label’s information, not evidence of a problem.","identity_basis":"listing","status":"live","source_refs":["facts_panel","source_listing"],"source_url":"https://www.amazon.com/dp/B0007PLP0W","scope":"exact_listing","inference_level":"gap","observed_at":"2026-07-27","presentation_tone":"gap","evidence_id":"ev-f59aa6005f85","evidence_url":"https://lookcloser.ai/e/ev-f59aa6005f85","content_fingerprint":"sha256:57f0852b147e8cfe30d3e8fe9ab8fafbe9e5a4fad28213f8a65acbedcb64d7f8","registry_receipts":[],"evidence":{"summary":"We read the full Supplement Facts panel from the listing-image panel (below), but the label doesn’t state a serving weight, so the arithmetic can’t run. A gap in the label’s information, not evidence of a problem.","source_refs":["facts_panel","source_listing"],"source_records":[{"source":"facts_panel","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","looked":"LookCloser checked Label and serving arithmetic.","found":"We read the full Supplement Facts panel from the listing-image panel (below), but the label doesn’t state a serving weight, so the arithmetic can’t run. A gap in the label’s information, not evidence of a problem."},"html_anchor":"finding-label-and-serving-arithmetic-multi-ingredient-formula-panel-read-serving","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-label-and-serving-arithmetic-multi-ingredient-formula-panel-read-serving"},{"id":"nih-published-research-research-context-is-available-for-the-listed-ingr","source":"NIH / published research","class":"gap","noted":false,"severity":"info","weight":22,"headline":"Research context is available for the listed ingredients","detail":"Published sources describe how magnesium, zinc have been studied. This is ingredient context only; the record does not establish that this product delivers the studied dose or outcome. Sources: NIH ODS — Magnesium fact sheet, PubMed search: magnesium glycinate supplementation.","proof":"Published sources describe how magnesium, zinc have been studied. This is ingredient context only; the record does not establish that this product delivers the studied dose or outcome. Sources: NIH ODS — Magnesium fact sheet, PubMed search: magnesium glycinate supplementation.","identity_basis":"ingredient","status":"live","source_refs":["nih_ods_magnesium","nih_ods_zinc","pubmed_magnesium","pubmed_zinc"],"source_url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","scope":"ingredient_context","inference_level":"gap","observed_at":"2026-07-27","presentation_tone":"gap","evidence_id":"ev-d3400873528d","evidence_url":"https://lookcloser.ai/e/ev-d3400873528d","content_fingerprint":"sha256:dfbbca64d759da0ee8cc2e123ebb106120455d6b61bbb60448b5f84ed41e244a","registry_receipts":[{"source":"nih_ods_magnesium","url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","label":"NIH ODS — Magnesium fact sheet","registry_name":"NIH ODS","standard":null,"identifier":"magnesium"},{"source":"nih_ods_zinc","url":"https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/","label":"NIH ODS — Zinc fact sheet","registry_name":"NIH ODS","standard":null,"identifier":"zinc"}],"evidence":{"summary":"Published sources describe how magnesium, zinc have been studied. This is ingredient context only; the record does not establish that this product delivers the studied dose or outcome. Sources: NIH ODS — Magnesium fact sheet, PubMed search: magnesium glycinate supplementation.","source_refs":["nih_ods_magnesium","nih_ods_zinc","pubmed_magnesium","pubmed_zinc"],"source_records":[{"source":"nih_ods_magnesium","source_url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient","registry_name":"NIH ODS","identifier":"magnesium","receipt_label":"NIH ODS — Magnesium fact sheet"},{"source":"nih_ods_zinc","source_url":"https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient","registry_name":"NIH ODS","identifier":"zinc","receipt_label":"NIH ODS — Zinc fact sheet"},{"source":"pubmed_magnesium","source_url":"https://pubmed.ncbi.nlm.nih.gov/?term=magnesium+glycinate+supplementation","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient"},{"source":"pubmed_zinc","source_url":"https://pubmed.ncbi.nlm.nih.gov/?term=zinc+supplementation+randomized","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient"}],"observed_at":"2026-07-27","looked":"LookCloser checked NIH / published research.","found":"Published sources describe how magnesium, zinc have been studied. This is ingredient context only; the record does not establish that this product delivers the studied dose or outcome. Sources: NIH ODS — Magnesium fact sheet, PubMed search: magnesium glycinate supplementation."},"html_anchor":"finding-nih-published-research-research-context-is-available-for-the-listed-ingr","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-nih-published-research-research-context-is-available-for-the-listed-ingr"},{"id":"review_velocity_gradual","source":"keepa","class":"ok","weight":20,"headline":"The review count moved gradually, not in one burst","detail":"Written reviews rose from 157 to 228 between July 14, 2025 and July 21, 2026. The largest rise inside any single 30-day window was about 11, so the count moved in steps rather than in one burst.","proof":{"first":["2025-07-14",157],"last":["2026-07-21",228],"max_30d_review_gain":11},"identity_basis":"listing","status":"live","severity":"ok","source_refs":["source_listing"],"source_url":"https://www.amazon.com/dp/B0007PLP0W","scope":"exact_listing","inference_level":"direct_observation","observed_at":"2026-07-27","presentation_tone":"ok","evidence_id":"ev-c7d76e4e41ed","evidence_url":"https://lookcloser.ai/e/ev-c7d76e4e41ed","content_fingerprint":"sha256:39a2809d760c36ff4889cc25dd34104617aac189ed0216db829119f0638ef72b","registry_receipts":[],"evidence":{"summary":{"first":["2025-07-14",157],"last":["2026-07-21",228],"max_30d_review_gain":11},"source_refs":["source_listing"],"source_records":[{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","looked":"LookCloser checked keepa.","found":"Written reviews rose from 157 to 228 between July 14, 2025 and July 21, 2026. The largest rise inside any single 30-day window was about 11, so the count moved in steps rather than in one burst."},"html_anchor":"finding-review_velocity_gradual","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-review_velocity_gradual"},{"id":"certification-laboratory-record-brand-holds-nsf-ansi-173-certification-b","source":"Certification / laboratory record","class":"gap","noted":false,"severity":"info","weight":19,"headline":"Brand holds NSF/ANSI 173 certification (brand-level)","detail":"21st Century HealthCare, Inc. appears in NSF’s certified-products registry with 0 certified product(s), but we couldn’t confirm this exact listing is among them. Certification covers contents and contaminants — not effectiveness.","proof":"21st Century HealthCare, Inc. appears in NSF’s certified-products registry with 0 certified product(s), but we couldn’t confirm this exact listing is among them. Certification covers contents and contaminants — not effectiveness.","identity_basis":"none","status":"live","source_refs":["nsf_search","source_listing"],"source_url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","scope":"search_scope","inference_level":"gap","observed_at":"2026-07-27","presentation_tone":"gap","evidence_id":"ev-c88f341e9cb2","evidence_url":"https://lookcloser.ai/e/ev-c88f341e9cb2","content_fingerprint":"sha256:c6ac041e6caa124cf547a1645fc3491dc6127b782afd081793f5a049a78dcd7c","registry_receipts":[{"source":"nsf_search","url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","label":"NSF/ANSI 173 · 21st Century HealthCare, Inc.","registry_name":"NSF","standard":"NSF/ANSI 173","identifier":"21st Century HealthCare, Inc."}],"evidence":{"summary":"21st Century HealthCare, Inc. appears in NSF’s certified-products registry with 0 certified product(s), but we couldn’t confirm this exact listing is among them. Certification covers contents and contaminants — not effectiveness.","source_refs":["nsf_search","source_listing"],"source_records":[{"source":"nsf_search","source_url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","observed_at":"2026-07-27","identity_basis":"company_brand","scope":"product_or_brand","registry_name":"NSF","standard":"NSF/ANSI 173","identifier":"21st Century HealthCare, Inc.","receipt_label":"NSF/ANSI 173 · 21st Century HealthCare, Inc."},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","looked":"LookCloser checked Certification / laboratory record.","found":"21st Century HealthCare, Inc. appears in NSF’s certified-products registry with 0 certified product(s), but we couldn’t confirm this exact listing is among them. Certification covers contents and contaminants — not effectiveness."},"html_anchor":"finding-certification-laboratory-record-brand-holds-nsf-ansi-173-certification-b","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-certification-laboratory-record-brand-holds-nsf-ansi-173-certification-b"},{"id":"fda-public-records-fda-recall-appears-in-this-brand-s-history","source":"FDA public records","class":"gap","noted":true,"severity":"info","weight":19,"headline":"FDA recall appears in this brand's history","detail":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st Century HealthCare, Inc., 2119 Wilson St., Tempe, AZ 85282”. FDA recorded the reason as “A small quantity of bottles of Vitamin D3 125 mcg ((5000 IU) 100 ct. were mislabeled as Vitamin D3 25 mcg (1000 IU). Secondary labeling on the bottles (back label) is correctly labeled as Vitamin D3 125 mcg (5000 IU)”. Verify at <a href=\"https://www.accessdata.fda.gov/scripts/ires/index.cfm\" rel=\"noopener\">FDA’s recall database</a>.","proof":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st Century HealthCare, Inc., 2119 Wilson St., Tempe, AZ 85282”. FDA recorded the reason as “A small quantity of bottles of Vitamin D3 125 mcg ((5000 IU) 100 ct. were mislabeled as Vitamin D3 25 mcg (1000 IU). Secondary labeling on the bottles (back label) is correctly labeled as Vitamin D3 125 mcg (5000 IU)”. Verify at <a href=\"https://www.accessdata.fda.gov/scripts/ires/index.cfm\" rel=\"noopener\">FDA’s recall database</a>.","identity_basis":"none","status":"live","source_refs":["openfda_search"],"source_url":"https://api.fda.gov/food/enforcement.json?search=(recalling_firm:%2221st+Century%22+OR+product_description:%2221st+Century%22)&limit=5","scope":"search_scope","inference_level":"gap","observed_at":"2026-07-27","presentation_tone":"caution","evidence_id":"ev-53546e921077","evidence_url":"https://lookcloser.ai/e/ev-53546e921077","content_fingerprint":"sha256:f14a74527f12ead1c91502301422b319137520412a26486f9ad95c5b1543bcc7","registry_receipts":[{"source":"openfda_search","url":"https://api.fda.gov/food/enforcement.json?search=(recalling_firm:%2221st+Century%22+OR+product_description:%2221st+Century%22)&limit=5","label":"FDA enforcement search · 21st Century","registry_name":"FDA enforcement","standard":null,"identifier":"21st Century"}],"evidence":{"summary":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st Century HealthCare, Inc., 2119 Wilson St., Tempe, AZ 85282”. FDA recorded the reason as “A small quantity of bottles of Vitamin D3 125 mcg ((5000 IU) 100 ct. were mislabeled as Vitamin D3 25 mcg (1000 IU). Secondary labeling on the bottles (back label) is correctly labeled as Vitamin D3 125 mcg (5000 IU)”. Verify at <a href=\"https://www.accessdata.fda.gov/scripts/ires/index.cfm\" rel=\"noopener\">FDA’s recall database</a>.","source_refs":["openfda_search"],"source_records":[{"source":"openfda_search","source_url":"https://api.fda.gov/food/enforcement.json?search=(recalling_firm:%2221st+Century%22+OR+product_description:%2221st+Century%22)&limit=5","observed_at":"2026-07-27","identity_basis":"product_brand","scope":"product_or_brand","registry_name":"FDA enforcement","identifier":"21st Century","receipt_label":"FDA enforcement search · 21st Century"}],"observed_at":"2026-07-27","looked":"LookCloser checked FDA public records.","found":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st Century HealthCare, Inc., 2119 Wilson St., Tempe, AZ 85282”. FDA recorded the reason as “A small quantity of bottles of Vitamin D3 125 mcg ((5000 IU) 100 ct. were mislabeled as Vitamin D3 25 mcg (1000 IU). Secondary labeling on the bottles (back label) is correctly labeled as Vitamin D3 125 mcg (5000 IU)”. Verify at <a href=\"https://www.accessdata.fda.gov/scripts/ires/index.cfm\" rel=\"noopener\">FDA’s recall database</a>."},"html_anchor":"finding-fda-public-records-fda-recall-appears-in-this-brand-s-history","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-fda-public-records-fda-recall-appears-in-this-brand-s-history"},{"id":"keepa-exact-listing-history-this-item-belongs-to-a-catalog-variation-fam","source":"Keepa exact-listing history","class":"gap","noted":false,"severity":"info","weight":19,"headline":"This item belongs to a catalog variation family","detail":"The paid catalog links this exact item to a parent listing. Review counts on public product pages may be shared across sizes, flavors, or other variants, so the count history is listing context — not evidence that reviewers received or tested this exact variant.","proof":"The paid catalog links this exact item to a parent listing. Review counts on public product pages may be shared across sizes, flavors, or other variants, so the count history is listing context — not evidence that reviewers received or tested this exact variant.","identity_basis":"listing","status":"live","source_refs":["keepa_history","source_listing"],"source_url":"https://keepa.com/#!product/1-B0007PLP0W","scope":"exact_listing","inference_level":"gap","observed_at":"2026-07-27","presentation_tone":"gap","evidence_id":"ev-e6c14b85f6be","evidence_url":"https://lookcloser.ai/e/ev-e6c14b85f6be","content_fingerprint":"sha256:c1532586725a9f9151372fbd943c137a73473a39c2888c520e923e383e389265","registry_receipts":[],"evidence":{"summary":"The paid catalog links this exact item to a parent listing. Review counts on public product pages may be shared across sizes, flavors, or other variants, so the count history is listing context — not evidence that reviewers received or tested this exact variant.","source_refs":["keepa_history","source_listing"],"source_records":[{"source":"keepa_history","source_url":"https://keepa.com/#!product/1-B0007PLP0W","observed_at":"2026-07-27","identity_basis":"exact_listing_identifier","scope":"exact_listing"},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","looked":"LookCloser checked Keepa exact-listing history.","found":"The paid catalog links this exact item to a parent listing. Review counts on public product pages may be shared across sizes, flavors, or other variants, so the count history is listing context — not evidence that reviewers received or tested this exact variant."},"html_anchor":"finding-keepa-exact-listing-history-this-item-belongs-to-a-catalog-variation-fam","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-keepa-exact-listing-history-this-item-belongs-to-a-catalog-variation-fam"},{"id":"keepa-exact-listing-history-180-day-review-count-history-is-on-file","source":"Keepa exact-listing history","class":"gap","noted":false,"severity":"info","weight":16,"headline":"180-day review-count history is on file","detail":"Exact-listing history records written-review counts from 156 on 2025-07-01 to 228 on 2026-07-21 (net +72). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.","proof":"Exact-listing history records written-review counts from 156 on 2025-07-01 to 228 on 2026-07-21 (net +72). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.","identity_basis":"listing","status":"live","source_refs":["keepa_history","source_listing"],"source_url":"https://keepa.com/#!product/1-B0007PLP0W","scope":"exact_listing","inference_level":"gap","observed_at":"2026-07-27","presentation_tone":"gap","evidence_id":"ev-33888a4964d4","evidence_url":"https://lookcloser.ai/e/ev-33888a4964d4","content_fingerprint":"sha256:5a7f4cabfe3e3280593b06575ebc838f465089e216f75e6da40592d78a079403","registry_receipts":[],"evidence":{"summary":"Exact-listing history records written-review counts from 156 on 2025-07-01 to 228 on 2026-07-21 (net +72). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.","source_refs":["keepa_history","source_listing"],"source_records":[{"source":"keepa_history","source_url":"https://keepa.com/#!product/1-B0007PLP0W","observed_at":"2026-07-27","identity_basis":"exact_listing_identifier","scope":"exact_listing"},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","looked":"LookCloser checked Keepa exact-listing history.","found":"Exact-listing history records written-review counts from 156 on 2025-07-01 to 228 on 2026-07-21 (net +72). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic."},"html_anchor":"finding-keepa-exact-listing-history-180-day-review-count-history-is-on-file","report_url":"https://lookcloser.ai/p/lc-058facdb/full#finding-keepa-exact-listing-history-180-day-review-count-history-is-on-file"}],"evidence_records":[{"evidence_id":"ev-c7d76e4e41ed","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:review_velocity_gradual","primary_source":"source_listing","claim":"The review count moved gradually, not in one burst","bucket":"checks_out","looked":"LookCloser checked keepa.","found":"Written reviews rose from 157 to 228 between July 14, 2025 and July 21, 2026. The largest rise inside any single 30-day window was about 11, so the count moved in steps rather than in one burst.","proof":{"first":["2025-07-14",157],"last":["2026-07-21",228],"max_30d_review_gain":11},"source_refs":[{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:39a2809d760c36ff4889cc25dd34104617aac189ed0216db829119f0638ef72b","evidence_url":"https://lookcloser.ai/e/ev-c7d76e4e41ed"},{"evidence_id":"ev-fa20229aafa6","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:nih-published-research-each-ingredient-s-amount-is-disclosed","primary_source":"nih_ods_magnesium","claim":"Each ingredient’s amount is disclosed","bucket":"checks_out","looked":"LookCloser checked NIH / published research.","found":"The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.","proof":{"detail":"The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research."},"source_refs":[{"source":"nih_ods_magnesium","source_url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient","registry_name":"NIH ODS","identifier":"magnesium","receipt_label":"NIH ODS — Magnesium fact sheet"},{"source":"nih_ods_zinc","source_url":"https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient","registry_name":"NIH ODS","identifier":"zinc","receipt_label":"NIH ODS — Zinc fact sheet"},{"source":"pubmed_magnesium","source_url":"https://pubmed.ncbi.nlm.nih.gov/?term=magnesium+glycinate+supplementation","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient"},{"source":"pubmed_zinc","source_url":"https://pubmed.ncbi.nlm.nih.gov/?term=zinc+supplementation+randomized","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:4690b3c6e89c906a0f0eede9e3db337e6227d32250d1022ec8f0519435bbd25d","evidence_url":"https://lookcloser.ai/e/ev-fa20229aafa6"},{"evidence_id":"ev-53546e921077","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:fda-public-records-fda-recall-appears-in-this-brand-s-history","primary_source":"openfda_search","claim":"FDA recall appears in this brand's history","bucket":"unverified","looked":"LookCloser checked FDA public records.","found":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st Century HealthCare, Inc., 2119 Wilson St., Tempe, AZ 85282”. FDA recorded the reason as “A small quantity of bottles of Vitamin D3 125 mcg ((5000 IU) 100 ct. were mislabeled as Vitamin D3 25 mcg (1000 IU). Secondary labeling on the bottles (back label) is correctly labeled as Vitamin D3 125 mcg (5000 IU)”. Verify at <a href=\"https://www.accessdata.fda.gov/scripts/ires/index.cfm\" rel=\"noopener\">FDA’s recall database</a>.","proof":{"detail":"This recall is not about the product on this page. Twenty-First Century Healthcare, Inc recalled a different product on May 7, 2021. FDA has since closed that case. The recalled item was “21st Century Vitamin D3 125 mcg (5000 IU) tablet, 100 count, UPC 7-40985-27431-6, 21st Century HealthCare, Inc., 2119 Wilson St., Tempe, AZ 85282”. FDA recorded the reason as “A small quantity of bottles of Vitamin D3 125 mcg ((5000 IU) 100 ct. were mislabeled as Vitamin D3 25 mcg (1000 IU). Secondary labeling on the bottles (back label) is correctly labeled as Vitamin D3 125 mcg (5000 IU)”. Verify at <a href=\"https://www.accessdata.fda.gov/scripts/ires/index.cfm\" rel=\"noopener\">FDA’s recall database</a>."},"source_refs":[{"source":"openfda_search","source_url":"https://api.fda.gov/food/enforcement.json?search=(recalling_firm:%2221st+Century%22+OR+product_description:%2221st+Century%22)&limit=5","observed_at":"2026-07-27","identity_basis":"product_brand","scope":"product_or_brand","registry_name":"FDA enforcement","identifier":"21st Century","receipt_label":"FDA enforcement search · 21st Century"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:f14a74527f12ead1c91502301422b319137520412a26486f9ad95c5b1543bcc7","evidence_url":"https://lookcloser.ai/e/ev-53546e921077"},{"evidence_id":"ev-ad2416d0d336","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:uspto-trademark-registry-multiple-uspto-brand-owner-records-are-shown","primary_source":"uspto_search","claim":"Multiple USPTO brand-owner records are shown","bucket":"unverified","looked":"LookCloser checked USPTO trademark registry.","found":"USPTO returned multiple live supplement-class records for the exact brand wordmark: Twenty-First Century Laboratories, Inc., Twenty-First Century HealthCare, Inc., Twenty First Century Nutritional Products, Inc.. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open.","proof":{"detail":"USPTO returned multiple live supplement-class records for the exact brand wordmark: Twenty-First Century Laboratories, Inc., Twenty-First Century HealthCare, Inc., Twenty First Century Nutritional Products, Inc.. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open."},"source_refs":[{"source":"uspto_search","source_url":"https://tsdr.uspto.gov/#caseNumber=76694514&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch","observed_at":"2026-07-27","identity_basis":"exact_wordmark_and_supplement_goods","scope":"brand","registry_name":"USPTO","identifier":"Registrations 3645342, 4085491, 1790110","receipt_label":"USPTO · Registrations 3645342, 4085491, 1790110"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:7cba5f68d45b5f4d074f728ffad8b6d83fa5eb28a988cd70658f7c65bb4ce52c","evidence_url":"https://lookcloser.ai/e/ev-ad2416d0d336"},{"evidence_id":"ev-f59aa6005f85","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:label-and-serving-arithmetic-multi-ingredient-formula-panel-read-serving","primary_source":"facts_panel","claim":"Multi-ingredient formula — panel read, serving weight unknown","bucket":"unverified","looked":"LookCloser checked Label and serving arithmetic.","found":"We read the full Supplement Facts panel from the listing-image panel (below), but the label doesn’t state a serving weight, so the arithmetic can’t run. A gap in the label’s information, not evidence of a problem.","proof":{"detail":"We read the full Supplement Facts panel from the listing-image panel (below), but the label doesn’t state a serving weight, so the arithmetic can’t run. A gap in the label’s information, not evidence of a problem."},"source_refs":[{"source":"facts_panel","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:57f0852b147e8cfe30d3e8fe9ab8fafbe9e5a4fad28213f8a65acbedcb64d7f8","evidence_url":"https://lookcloser.ai/e/ev-f59aa6005f85"},{"evidence_id":"ev-c88f341e9cb2","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:certification-laboratory-record-brand-holds-nsf-ansi-173-certification-b","primary_source":"nsf_search","claim":"Brand holds NSF/ANSI 173 certification (brand-level)","bucket":"unverified","looked":"LookCloser checked Certification / laboratory record.","found":"21st Century HealthCare, Inc. appears in NSF’s certified-products registry with 0 certified product(s), but we couldn’t confirm this exact listing is among them. Certification covers contents and contaminants — not effectiveness.","proof":{"detail":"21st Century HealthCare, Inc. appears in NSF’s certified-products registry with 0 certified product(s), but we couldn’t confirm this exact listing is among them. Certification covers contents and contaminants — not effectiveness."},"source_refs":[{"source":"nsf_search","source_url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","observed_at":"2026-07-27","identity_basis":"company_brand","scope":"product_or_brand","registry_name":"NSF","standard":"NSF/ANSI 173","identifier":"21st Century HealthCare, Inc.","receipt_label":"NSF/ANSI 173 · 21st Century HealthCare, Inc."},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:c6ac041e6caa124cf547a1645fc3491dc6127b782afd081793f5a049a78dcd7c","evidence_url":"https://lookcloser.ai/e/ev-c88f341e9cb2"},{"evidence_id":"ev-7a180109a8ee","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:certification-laboratory-record-testing-claimed-documentation-not-found","primary_source":"nsf_search","claim":"Testing claimed — documentation not found","bucket":"unverified","looked":"LookCloser checked Certification / laboratory record.","found":"The observed listing claims third-party testing without naming a lab or certifier. 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IFOS, USP, and Informed-Sport were not checked in this record."},"source_refs":[{"source":"nsf_search","source_url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","observed_at":"2026-07-27","identity_basis":"company_brand","scope":"product_or_brand","registry_name":"NSF","standard":"NSF/ANSI 173","identifier":"21st Century HealthCare, Inc.","receipt_label":"NSF/ANSI 173 · 21st Century HealthCare, Inc."},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:439c7fae5d6bb42fd639dae7e0d503443429a622bc6ccf68bc3887be74054cbb","evidence_url":"https://lookcloser.ai/e/ev-7a180109a8ee"},{"evidence_id":"ev-33888a4964d4","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:keepa-exact-listing-history-180-day-review-count-history-is-on-file","primary_source":"keepa_history","claim":"180-day review-count history is on file","bucket":"unverified","looked":"LookCloser checked Keepa exact-listing history.","found":"Exact-listing history records written-review counts from 156 on 2025-07-01 to 228 on 2026-07-21 (net +72). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.","proof":{"detail":"Exact-listing history records written-review counts from 156 on 2025-07-01 to 228 on 2026-07-21 (net +72). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic."},"source_refs":[{"source":"keepa_history","source_url":"https://keepa.com/#!product/1-B0007PLP0W","observed_at":"2026-07-27","identity_basis":"exact_listing_identifier","scope":"exact_listing"},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:5a7f4cabfe3e3280593b06575ebc838f465089e216f75e6da40592d78a079403","evidence_url":"https://lookcloser.ai/e/ev-33888a4964d4"},{"evidence_id":"ev-e6c14b85f6be","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:keepa-exact-listing-history-this-item-belongs-to-a-catalog-variation-fam","primary_source":"keepa_history","claim":"This item belongs to a catalog variation family","bucket":"unverified","looked":"LookCloser checked Keepa exact-listing history.","found":"The paid catalog links this exact item to a parent listing. Review counts on public product pages may be shared across sizes, flavors, or other variants, so the count history is listing context — not evidence that reviewers received or tested this exact variant.","proof":{"detail":"The paid catalog links this exact item to a parent listing. Review counts on public product pages may be shared across sizes, flavors, or other variants, so the count history is listing context — not evidence that reviewers received or tested this exact variant."},"source_refs":[{"source":"keepa_history","source_url":"https://keepa.com/#!product/1-B0007PLP0W","observed_at":"2026-07-27","identity_basis":"exact_listing_identifier","scope":"exact_listing"},{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:c1532586725a9f9151372fbd943c137a73473a39c2888c520e923e383e389265","evidence_url":"https://lookcloser.ai/e/ev-e6c14b85f6be"},{"evidence_id":"ev-d3400873528d","record_id":"lc-058facdb","gtin":null,"claim_key":"finding:nih-published-research-research-context-is-available-for-the-listed-ingr","primary_source":"nih_ods_magnesium","claim":"Research context is available for the listed ingredients","bucket":"unverified","looked":"LookCloser checked NIH / published research.","found":"Published sources describe how magnesium, zinc have been studied. 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Sources: NIH ODS — Magnesium fact sheet, PubMed search: magnesium glycinate supplementation."},"source_refs":[{"source":"nih_ods_magnesium","source_url":"https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient","registry_name":"NIH ODS","identifier":"magnesium","receipt_label":"NIH ODS — Magnesium fact sheet"},{"source":"nih_ods_zinc","source_url":"https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient","registry_name":"NIH ODS","identifier":"zinc","receipt_label":"NIH ODS — Zinc fact sheet"},{"source":"pubmed_magnesium","source_url":"https://pubmed.ncbi.nlm.nih.gov/?term=magnesium+glycinate+supplementation","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient"},{"source":"pubmed_zinc","source_url":"https://pubmed.ncbi.nlm.nih.gov/?term=zinc+supplementation+randomized","observed_at":"2026-07-27","identity_basis":"named_ingredient","scope":"ingredient"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:dfbbca64d759da0ee8cc2e123ebb106120455d6b61bbb60448b5f84ed41e244a","evidence_url":"https://lookcloser.ai/e/ev-d3400873528d"},{"evidence_id":"ev-01ae1da83625","record_id":"lc-058facdb","gtin":null,"claim_key":"claim:testing","primary_source":"source_listing","claim":"“Lab”","bucket":"unverified","looked":"the observed listing, retained brand product page, the NSF/ANSI 173 certified-products registry, any linked COA or test report; IFOS, USP, Informed-Sport were not queried","found":"No named laboratory or lot-specific certificate was found for this exact product. No exact brand product page was available for a document check. IFOS, USP, and Informed-Sport were not checked in this record. This is a public-evidence limit, not a finding that testing did not occur.","proof":{"kind":"testing","status":"unverified","snippet":"…Third-Party Lab Tested…"},"source_refs":[{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"},{"source":"nsf_search","source_url":"https://info.nsf.org/Certified/dietary/Listings.asp?CompanyName=21st&","observed_at":"2026-07-27","identity_basis":"company_brand","scope":"product_or_brand","registry_name":"NSF","standard":"NSF/ANSI 173","identifier":"21st Century HealthCare, Inc.","receipt_label":"NSF/ANSI 173 · 21st Century HealthCare, Inc."}],"observed_at":"2026-07-27","content_fingerprint":"sha256:f95bc7883e87bc353631fe99beca28fa5f553120fd7278db8d96e69aab570a0e","evidence_url":"https://lookcloser.ai/e/ev-01ae1da83625"},{"evidence_id":"ev-d5f7d6cfaa00","record_id":"lc-058facdb","gtin":null,"claim_key":"claim:manufacturing","primary_source":"source_listing","claim":"“Certified & FDA”","bucket":"partly","looked":"the facility registration or certificate behind the claim","found":"“GMP-certified” describes factory processes, not what is in the bottle. The claim does not name a certifier or public register that a shopper can check.","proof":{"kind":"manufacturing","status":"partly","snippet":"…GMP Certified & FDA Registered…"},"source_refs":[{"source":"source_listing","source_url":"https://www.amazon.com/dp/B0007PLP0W","observed_at":"2026-07-27","identity_basis":"listing_identifier","scope":"exact_listing"}],"observed_at":"2026-07-27","content_fingerprint":"sha256:09e724f27bc87b8d1ca1bdad797acb72bda808a51c302b2f74133fec02148c43","evidence_url":"https://lookcloser.ai/e/ev-d5f7d6cfaa00"},{"evidence_id":"ev-f57f896fc945","record_id":"lc-058facdb","gtin":null,"claim_key":"claim:efficacy","primary_source":"source_listing","claim":"“DAILY MULTIVITAMIN FOR ADULTS 50+* - Each tablet delivers 20+ essential vitamins and minerals including Vitamin D3 (1,000 IU), B12 (25 mcg),…”","bucket":"partly","looked":"whether the ingredient doses on the label match the doses used in published research","found":"Published research exists for ingredients in this formula. 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