“Certified & FDA”
Evidence →“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.
Exact product checked · barcode not published21st Century · checked Jul 27, 2026USPTO returned 3 exact supplement-class owner records · inspect the identity trail
Quick read · 21st Century
21st Century Sentry Senior Tablets, 265 Count
Checked against public sources on July 27, 2026 · LookCloser does not sell or recommend supplements.
265tablets
Does the marketing hold up?
FDA recall appears in this brand's history. An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.
Is the dose real?Panel read — dose not verified25 ingredients listed; no advertised amount we could confirm against them
What a serving costsNo price found for this exact barcode
Is it tested?Claimed — no lab or certificate found
Who’s behind it?USPTO lists 3 owner recordssame brand name, more than one registrant — we don’t choose between them
Is it the real thing?No barcode publishedso it can’t be matched against certification, recall or other retailer records
Trouble on record?Brand history — not this product
“Couldn’t verify” means we looked and found no public proof — not a mark against the product. Most supplement claims cannot be independently verified by anyone, so grey is the normal state of this industry.
2◖ partly confirmed1? couldn’t verifyno contradictions · brand-level recall on file
The label itself
What the Supplement Facts panel says
| Vitamin A (Acetate, 40% as Beta-Carotene) | 750 mcg |
|---|---|
| Vitamin C (as Ascorbic Acid) | 60 mg |
| Vitamin D3 (as Cholecalciferol) | 25 mcg |
| Vitamin E (as dl-Alpha Tocopheryl Acetate) | 22.5 mg |
| Vitamin K (as Phytonadione) | 30 mcg |
| Thiamin (as Thiamin Mononitrate, B-1) | 1.5 mg |
| Riboflavin (as Vitamin B-2) | 1.7 mg |
| Niacin (as Niacinamide) | 20 mg |
| Vitamin B-6 (as Pyridoxine HCl) | 3 mg |
| Folate (400 mcg Folic Acid) | 667 mcg DFE |
| Vitamin B-12 (as Cyanocobalamin) | 25 mcg |
| Biotin | 30 mcg |
| Pantothenic Acid (as d-Calcium Pantothenate) | 10 mg |
| Calcium (as Calcium Carbonate & Dicalcium Phosphate) | 220 mg |
| Phosphorus (as Dicalcium Phosphate) | 20 mg |
| Iodine (as Potassium Iodide) | 150 mcg |
| Magnesium (as Magnesium Oxide) | 50 mg |
| Zinc (as Zinc Oxide) | 11 mg |
| Selenium (as Sodium Selenate) | 19 mcg |
| Copper (as Copper Sulfate) | 0.5 mg |
| Manganese (as Manganese Sulfate) | 2.3 mg |
| Chromium (as Chromium Picolinate) | 50 mcg |
| Molybdenum (as Sodium Molybdate) | 45 mcg |
| Chloride (as Potassium Chloride) | 72 mg |
| Potassium (as Potassium Chloride) | 80 mg |
Printed on the package: Non-GMO · Gluten Free · Third-Party Lab Tested · Packaged in the U.S.A.
We read 25 lines from the package photograph. It is our transcript of the label, not the manufacturer’s panel, and it may be incomplete.
Marketing claims, checked
The checks, one by one
The public sources did not settle the marketing promises on this label.
◐Partly confirmed2
“DAILY MULTIVITAMIN FOR ADULTS 50+* - Each tablet delivers 20+ essential vitamins and minerals including Vitamin D3 (1,000 IU), B12 (25 mcg),…”
Evidence →Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed.
Ingredient research can support context, but it is not a trial of this exact product.
?Couldn’t verify independently1
“Lab”
Evidence →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.
We looked and found no public proof. That does not count against the product.
Quick read · 4 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
Needs explanationAny trouble in public records?
FDA recall appears in this brand's history
An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.
Evidence and sources
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…”
Locked evidence record →Open the full source-linked findingPublic contextWho is behind it?
Registered owner records: Twenty-First Century Laboratories, Inc. · Twenty-First Century HealthCare, Inc. · Twenty First Century Nutritional Products, Inc.
The public ownership record is ambiguous. We show the exact candidates instead of choosing one by name similarity.
Evidence and sources
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.. …
Locked evidence record →Open the full source-linked findingCheckedIs the label honest?
Every ingredient shows its amount · 25 ingredients listed.
Every ingredient shows its real amount — nothing is hidden in a proprietary blend.
Evidence and sources
The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.
Locked evidence record →Open the full source-linked findingCheckedCan you trust the review pattern?
Reviews rose from 157 to 228 between July 14, 2025 and July 21, 2026 — no sudden jump.
A count that moves steadily is ordinary. A sudden burst is what deserves a closer look.
Evidence and sources
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.
Locked evidence record →Open the full source-linked findingWho owns the brand wordmark?
The brand has 3 exact supplement-class records
These are the USPTO records behind the brand name. We show them all rather than choosing one by similarity.
🇺🇸Twenty-First Century Laboratories, Inc.
ARIZONA, USA · Registration 3645342
2119 South Wilson Street, Tempe, ARIZONA 85282, UNITED STATES
Goods covered by this record
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.
🇺🇸Twenty-First Century HealthCare, Inc.
ARIZONA, USA · Registration 4085491
443 West Alameda Drive, Tempe, ARIZONA 85282, UNITED STATES
Goods covered by this record
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 ].
🇺🇸Twenty First Century Nutritional Products, Inc.
ARIZONA, USA · Registration 1790110
2445 West 12th Street, Tempe, ARIZONA 85281, UNITED STATES
Goods covered by this record
IC 005: vitamins, herbal remedies and nutritional supplements.
This answers who owns registrations for the brand wordmark. It does not by itself prove which entity made, imported, or sold this specific product. Open USPTO source ↗
Research behind the findings
Dose and research context
We could not match an amount on this product to a studied range for the same ingredient, so these links are ingredient background rather than a measurement of this product.
Background reading
What the research says about these amounts
Not a score. Studies disagree with each other and change over time, so this sits beside the evidence rather than counting toward it — it is here so you can read the sources yourself.
The panel lists 50 mg of magnesium per serving. Studies we found used 200 mg–420 mg a day, so this sits below that range.
0studied 200 mg–420 mg
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
The panel lists 11 mg of zinc per serving. Studies we found used 8 mg–40 mg a day, so this sits inside that range.
0studied 8 mg–40 mg
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
Buying options
Where you can check or buy it
Only the submitted seller page is identity-certain. Other destinations are shown as leads until a shared UPC/GTIN confirms the exact product.
Amazon
Submitted listing$15.99
Amazon Retail observed via Keepa on 2026-07-27.
View on Amazon ↗iHerb
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search iHerb ↗Target
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search Target ↗Walmart
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search Walmart ↗Prices and stock are point-in-time observations. Related pages are never used as product evidence. No affiliate links; LookCloser earns nothing from these sellers.
Want to inspect the evidence?
The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Record built July 27, 2026. Sources: source listing observed at check time · USPTO Trademark Search · Keepa exact-listing history · NIH / published research · certification and regulator records where available. LookCloser publishes evidence and gaps; it does not advise for or against any supplement. Evidence-based corrections welcome.