Testing claim names a recognized certifier
A named certifier/laboratory appears in the listing (registry cross-check pending).
Full record · 812239001129 · back to the summary
Sandhu'S Magnesium Glycinate with Quercetin Capsules - 120 Ct
Exact product checkedGTIN 00812239001129 · checked 2026-07-24
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How to read this report
What this is. We compare what a listing claims against what public records show — label arithmetic, barcode registries, NIH’s label catalog, FDA enforcement data, certification registries, and published research. Every statement below traces to one of those.
What the states mean. Confirmed = an outside source agrees. Contradicted = an outside source disagrees. Caution = something needs explaining. No data = we looked and found nothing — a gap, not a strike.
What it is not. A clean record is not an endorsement and never proof a product works. A thin record is not an accusation. We publish evidence and gaps; the conclusion is yours. Nothing here is medical advice.
Something wrong? Every figure is meant to be checkable — sources are named and linked. Send a correction and we’ll fix the record.
Panel, decoded
What the label discloses
2listed rows
2separately quantified
0combined blend totals
The listing-image panel publishes an amount for each of its 2 listed rows. That supports ingredient-by-ingredient review; it does not verify the contents.
| Panel row | Amount | %DV | What to notice |
|---|---|---|---|
| Magnesium (elemental) | 72 mg | — | |
| Quercetin (as quercetin dihydrate) | 50 mg | — |
FDA rules (21 CFR 101.36) require the amount of each dietary ingredient per serving unless hidden in a listed “proprietary blend” (legal, but a transparency yellow flag). A label stating no amount at all is non-compliant — a checkable red flag. This panel states amounts; the open question is whether those listed amounts are independently verified and how they compare with relevant research.
vision:google/gemini-flash-1.5 Amounts are shown as listed panel data, not independently lab-tested contents.
Every check we ran
Confirmed evidence
What checked out5
These checks found support in the public record. They confirm specific facts, not the product as a whole.
Confirmed
Exact trademark owner identified
USPTO lists Sandhu Products, Inc. (CORPORATION) in CALIFORNIA, USA for the exact brand wordmark. This identifies the USPTO mark owner or applicant; it does not by itself prove who manufactures or sells this product.
Found on the brand's own store
The brand's store lists this exact barcode as “Magnesium Glycinate with Quercetin Capsules - 120 Ct” (variant: 1) — identity confirmed across retailer listings.
Barcode confirmed in an outside database
UPCitemdb resolves 812239001129 to "Sandhu s Magnesium Glycinate 400mg Capsules with Quercetin | Supports Quality Sl" (SANDHU S) — consistent with this listing.
Reviews accumulated gradually
Written reviews grew from 352 to 483 across 2026-02-16 – 2026-07-21 with no single manufactured spike (largest 30-day gain ~42).
Documented concerns
What needs caution0
These are documented contradictions or claims that need more evidence. They are separate from missing data.
No contradictions or product-specific cautions were found at this check depth.
Unresolved public record
What is still missing6
We looked for these signals but could not settle them from public sources. A gap is not a strike.
Magnesium amount, in daily-intake context
label states 72 mg/serving — about 17% of the adult daily reference (adult RDA 310–420 mg elemental; NIH sets 350 mg/day as the supplemental upper level for elemental magnesium). A single serving isn’t meant to supply a full day, so this is context, not a shortfall. Caveat: chelate labels (glycinate, citrate) often state compound mass, which reads ~5–7× higher than elemental magnesium — the Supplement Facts panel settles which is meant. Sources: NIH ODS — Magnesium fact sheet, PubMed search: magnesium glycinate supplementation.
Panel amounts are awaiting a clearer image read
The current image extraction saved 2 ingredient name(s) but no usable amounts. This is a LookCloser processing gap, not evidence that the brand withheld the numbers; dose arithmetic is withheld until the panel is re-read.
Research context is available for the listed ingredients
Published sources describe how magnesium 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.
Public label filing not saved
This record does not currently hold an matched to this exact product public label filing for the exact product. That is a LookCloser coverage gap, not evidence that no filing exists.
This item belongs to a catalog variation family
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.
180-day review-count history is on file
Exact-listing history records written-review counts from 338 on 2026-02-02 to 483 on 2026-07-21 (net +145). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.
What to ask and check
What would settle the open questions
Why is this shown?
Everything we couldn’t verify is something a person can still ask about. Rather than leave gaps sitting as dead ends, we turn each one into a specific question — the exact document, citation, or number that would settle it — plus the things you can confirm yourself with the bottle in your hand.
Ask the brand or seller
1
Can you send the certificate of analysis (COA) for the lot number on my bottle?
A real COA names the testing laboratory, the test date, the lot it covers, and what was measured. “Third-party tested” with no document behind it is a marketing sentence.
2
Is this label filed with NIH’s Dietary Supplement Label Database (DSLD)?
Filing is voluntary, so absence proves nothing — but a filed label puts the full ingredient table on public record where anyone can read it.
3
Where are the ingredients sourced, and where is the product manufactured?
“Made in USA” can describe only the final bottling step. Ask which country the actives came from and whether the facility is audited.
Most brands and sellers publish a contact route. A clear answer adds evidence to the record; no answer leaves the question open.
Check for yourself — no one’s permission needed
1
Compare the panel on the bottle in your hand to the one shown in this record.
Ours was read from listing photos and can contain reading errors. The physical label is the source of truth — if they disagree, tell us and we’ll correct the record.
2
Scan the barcode on the package and confirm it reads 812239001129.
A mismatch between the barcode on the box and the one on the listing is worth pausing over — it can indicate a different variant, a repack, or a counterfeit.
3
Check the lot number and expiry on the bottle against any COA you’re given.
A certificate that doesn’t name your lot doesn’t describe what you’re holding.
These are the open questions on this specific record — not a warning about the product, and not a suggestion to buy or avoid it. Getting them answered is how you decide for yourself.
What the listing promises — claim by claim
Why is this shown?
A listing’s promises are the reason people buy. Each one gets its own row: what was promised, what evidence would settle it, and what we could actually find. We never call a claim false — only whether proof proportionate to it exists on the public record.
| Claim | Status | What we found |
|---|---|---|
| Quality-testing claim “…in an NSF-GMP certified California facility. 3rd-party tested for purity and potency. Gluten, soy and dair…” | Partly supported We looked for: the observed listing, saved brand product page, any linked COA or test report; NSF, IFOS, USP, Informed-Sport were not queried | A testing body is named on the listing, but we found no lot-specific certificate of analysis. |
| Manufacturing claim “…ILITY + RISK-FREE GUARANTEE — Made in an NSF-GMP certified California facility. 3rd-party tes…” | Partly supported We looked for: the facility registration or certificate behind the claim | “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. |
| Origin claim “…GMP QUALITY CERTIFIED THIRD PARTY LAB TESTED MANUFACTURED IN USA WITH GLOBALLY SOURCE NSF CERTIFIED FACILITY” | Claimed, not verifiable We looked for: customs records or label filings showing where ingredients were sourced and where it was made | “Made in USA” can describe only final bottling. Ingredient-sourcing records were not located for this product. |
| Benefit claim “…t flavonoid. Helps ease oxidative stress AND support quality sleep — one capsule does both. HONES…” | Partly supported We looked for: whether the ingredient doses on the label match the doses used in published research | Ingredient evidence exists; on dose: label states 72 mg/serving — about 17% of the adult daily reference (adult RDA 310–420 mg elemental; NIH sets 350 mg/day as the supplemental upper level for elemental magnesium). A single serving isn’t meant to supply a full day, so this is context, not a shortfall. Caveat: chelate labels (glycinate, citrate) often state compound mass, which reads ~5–7× higher than elemental magnesium — the Supplement Facts panel settles which is meant. |
“No evidence located” does not mean a claim is false — it means the seller has not put evidence proportionate to the claim on the public record, and we could not find any. Absence of proof is not proof of absence.
This label vs. the doses studied
Why is this shown?
An ingredient can be well-studied at one amount and barely studied at the amount in your bottle. This lines the label up against the doses researchers actually used. It answers ‘are these the same numbers?’ — never ‘should you take this?’
| Ingredient | Where this label sits | Reading |
|---|---|---|
| Magnesium (elemental) | shaded = doses used in studies (200 mg–420 mg) · bar = this label | 72 mg — below the studied range |
Matching a studied dose does not mean the product works, and missing it does not mean it fails — it shows whether the label and the research are talking about the same amounts. Not a recommendation to take any amount.
Documented cautions
- magnesium — daily oral use; chelated forms (glycinate) are studied for absorption — note labels may state compound mass rather than elemental magnesium, which differs ~7-fold
Statements from published sources about these ingredients — not advice about this product, and not a complete safety review. Anyone taking medication should talk to a pharmacist or clinician.
Verifiability profile — 4 of 6 public signals
✓ UPC / GTIN published✓ Supplement Facts visible in photos✓ Brand's own store found✓ Third-party lab named or registry-certified· Per-serving dose established — not published· Found in NIH's label catalog (DSLD) — not published
What this listing gives the public to check. Publishing these signals doesn't prove quality — but withholding them means claims can only be taken on faith.
Identity
| UPC (barcode) — also our record ID | 812239001129 — via source listing UPC |
| Brand | Sandhu's |
| Source listing identifier | B0DSPY1SW6 |
| Retailer listing title | Magnesium Glycinate 400mg High Absorption Capsules with Quercetin | Qu… show full titleMagnesium Glycinate 400mg High Absorption Capsules with Quercetin | Quality Sleep, Relaxation & Muscle Health Supplement for Women and Men | Chelated Magnesium 120 Count (Pack of 1) | Easy to Swallow |
| USPTO brand owner | Sandhu Products, Inc. · CORPORATION · CALIFORNIA, USA |
| Owner filed address | 4580 Contractors Place, Livermore, California 94551, UNITED STATES |
From the label (photo-read)
| Serving size | 1 Capsule |
| Servings per container | 120 |
| Pack statement | 120 Capsules |
| Badges printed on pack | Third Party Lab Tested, Gluten, Soy & Dairy Free, GMP QUALITY CERTIFIED, THIRD PARTY LAB TESTED, MANUFACTURED IN USA WITH GLOBALLY SOURCE, NSF CERTIFIED FACILITY |
Supplement Facts panel (photo-read):
| Ingredient | Amount per serving | Reading confidence |
|---|---|---|
| Magnesium (elemental) | 72 mg | High clearly legible in the photo |
| Quercetin (as quercetin dihydrate) | 50 mg | High clearly legible in the photo |
Claims printed on the packaging:
“HIGH ABSORPTION” · “Third Party Lab Tested” · “Research Based Nutrition” · “Gluten, Soy & Dairy Free” · “4 MONTHS SUPPLY” · “Quality Sleep, Muscle Health & Calm mind in every serving.*” · “Highly absorbable & chelated form that works gentle on stomach & supports overall wellness.*” · “Chelated for High Absorption*”
Read by a vision model from 8 listing photos — verbatim extraction; OCR errors possible. Spot a mistake? It will be corrected on review.
Where it sells
| Seller | Price |
|---|---|
| Retailer listing ↗ | $21.49 checked Jul 25, 2026 — varies by variant/session; price history pending |
| Brand store (sandhus.com) ↗ | $27.00 variant: 1 — matching UPC/GTIN |
Brand store sandhus.com: 52 supplement products (+40 merch items) — for comparison, single-focus brands typically carry 5–30 products; very broad catalogs are common among companies that rebrand ready-made formulas — a pattern note, not a verdict.
Reference links for identification only — LookCloser has no affiliate relationships and earns nothing from any link on this page.
Ingredient science — NIH references
Magnesium — NIH ODS · MedlinePlus · PubMed (11,814) · UL 350 mg (SUPPLEMENTAL magnesium only (not from food))
Reference data from the NIH Office of Dietary Supplements, IOM Dietary Reference Intakes, and PubMed. A Tolerable Upper Intake Level is a documented reference figure, not a safety verdict — both the listed amount and the reference are shown for your own judgment. LookCloser gives no medical advice.
Related research & consistency
magnesium — NIH ODS — Magnesium fact sheet · PubMed search: magnesium glycinate supplementation · WebMD: magnesium · ClinicalTrials.gov — 3,206 registered studies
ℹ Dosage: label states 72 mg/serving — about 17% of the adult daily reference (adult RDA 310–420 mg elemental; NIH sets 350 mg/day as the supplemental upper level for elemental magnesium). A single serving isn’t meant to supply a full day, so this is context, not a shortfall. Caveat: chelate labels (glycinate, citrate) often state compound mass, which reads ~5–7× higher than elemental magnesium — the Supplement Facts panel settles which is meant.
ℹ Use pattern in research: daily oral use; chelated forms (glycinate) are studied for absorption — note labels may state compound mass rather than elemental magnesium, which differs ~7-fold.
These notes state where label numbers and marketing framing sit relative to published research — documentation for your own judgment, not medical advice. LookCloser does not advise for or against taking any supplement.
Record 812239001129 · built July 25, 2026 · lookcloser.ai · corrections@lookcloser.ai