Testing claim names a recognized certifier
A named certifier/laboratory appears in the listing (registry cross-check pending).
Full record · lc-00553797 · back to the summary
Sandhu's Vitamin D3 K2 Magnesium 2000 IU, 50mcg K2 Capsules 120 Count (Pack of 1) | with…
Exact product checkedGTIN not published · checked 2026-09-03
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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
6listed rows
6separately quantified
0combined blend totals
The listing-image panel publishes an amount for each of its 6 listed rows. That supports ingredient-by-ingredient review; it does not verify the contents.
| Panel row | Amount | %DV | What to notice |
|---|---|---|---|
| Vitamin D3 (as cholecalciferol) | 50 mcg (2000 IU) | — | |
| Vitamin K2 (as menaquinone-7) | 50 mcg | — | |
| Vitamin B6 (as pyridoxal-5-phosphate) | 1.7 mg | — | |
| Magnesium (as magnesium citrate) | 25 mg | — | |
| Zinc (as zinc monomethionine chelate complex) | 11 mg | — | |
| Quercetin (as quercetin dihydrate) | 25 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-2.5-flash Amounts are shown as listed panel data, not independently lab-tested contents.
Every check we ran
Confirmed evidence
What checked out4
These checks found support in the public record. They confirm specific facts, not the product as a whole.
Confirmed
Every ingredient amount is disclosed
The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.
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.
The review count moved gradually, not in one burst
Written reviews rose from 0 to 19 between March 11 and August 25, 2026. The largest rise inside any single 30-day window was about 8, so the count moved in steps rather than in one burst.
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 missing4
We looked for these signals but could not settle them from public sources. A gap is not a strike.
Multi-ingredient formula — panel read, serving weight unknown
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.
Research context is available for the listed ingredients
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.
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 0 on 2026-03-11 to 19 on 2026-08-25 (net +19). 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
What is the product’s UPC or GTIN?
The barcode is how a product gets matched to outside records — certification registries, label databases, recall data. Without it, almost nothing can be cross-checked.
3
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.
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
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 “…NSF-GMP-CERTIFIED USA FACILITY — Every batch third-party tested for purity and potency.…” | 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 brand page (NSF), but we found no lot-specific certificate of analysis. |
| Manufacturing claim “…NSF-GMP-CERTIFIED USA FACILITY — Every batch third-party tested for purity and potency.…” | 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. |
| Benefit claim “…D3K2 Supports Superior Absorption, Energy, Immune, Muscle Health for Men & Women…” | Partly supported We looked for: whether the ingredient doses on the label match the doses used in published research | Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed. |
“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 (as magnesium citrate) | shaded = doses used in studies (200 mg–420 mg) · bar = this label | 25 mg — below the studied range |
| Zinc (as zinc monomethionine chelate complex | shaded = doses used in studies (8 mg–40 mg) · bar = this label | 11 mg — within 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
- zinc — daily oral use; sustained high intakes can interfere with copper absorption — a documented interaction, not advice
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 — 3 of 6 public signals
✓ Supplement Facts visible in photos✓ Brand's own store found✓ Third-party lab named or registry-certified· Per-serving dose established — not published· UPC / GTIN published — 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
| LookCloser record ID | lc-00553797 (internal — no barcode published, which limits cross-checking) |
| Brand | Sandhu's |
| Source listing identifier | B0GPF6D4VW |
| Retailer listing title | Sandhu's Vitamin D3 K2 Magnesium 2000 IU, 50mcg K2 Capsules 120 Count … show full titleSandhu's Vitamin D3 K2 Magnesium 2000 IU, 50mcg K2 Capsules 120 Count (Pack of 1) | with VIT B6, Zinc & Quercetin | D3K2 Supports Superior Absorption, Energy, Immune, Muscle Health for Men & Women |
| 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 | Serving Size: 1 Capsule |
| Servings per container | 120 |
| Pack statement | 120 Capsules |
| Badges printed on pack | Clinicians' Choice, Third Party Lab Tested, Practitioner's Formulated, Gluten & Dairy Free |
Supplement Facts panel (photo-read):
| Ingredient | Amount per serving | Reading confidence |
|---|---|---|
| Vitamin D3 (as cholecalciferol) | 50 mcg (2000 IU) | High clearly legible in the photo |
| Vitamin K2 (as menaquinone-7) | 50 mcg | High clearly legible in the photo |
| Vitamin B6 (as pyridoxal-5-phosphate) | 1.7 mg | High clearly legible in the photo |
| Magnesium (as magnesium citrate) | 25 mg | High clearly legible in the photo |
| Zinc (as zinc monomethionine chelate complex) | 11 mg | High clearly legible in the photo |
| Quercetin (as quercetin dihydrate) | 25 mg | High clearly legible in the photo |
Claims printed on the packaging:
“2,000 IU D3 | 50 mcg K2” · “DIETARY SUPPLEMENT” · “Effective Calcium Absorption & Muscle Health in every serving.*” · “Vitamin D3+K2 with Quercetin” · “Quercetin eases oxidative stress, supports the effects of vitamins, helping calcium uptake & overall wellness.*” · “Best way to take” · “Take 1 capsule daily with food, to achieve complete benefits of vitamins.*” · “4 MONTHS SUPPLY”
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
We found a brand storefront, but we could not match any price on it to this exact product when we checked.
Official brand domain: sandhus.com. This storefront does not expose a complete public catalog count.
Reference links for identification only — LookCloser has no affiliate relationships and earns nothing from any link on this page.
Ingredient science — NIH references
Vitamin D — NIH ODS · MedlinePlus · PubMed (26,500) · UL 100 mcg (adults; 100 mcg = 4,000 IU)
Vitamin K — NIH ODS · MedlinePlus · PubMed (2,124) · no UL established; interacts with warfarin
Vitamin B6 — NIH ODS · MedlinePlus · PubMed (2,372) · UL 100 mg (adults; chronic high intake linked to neuropathy)
Magnesium — NIH ODS · MedlinePlus · PubMed (11,814) · UL 350 mg (SUPPLEMENTAL magnesium only (not from food))
Zinc — NIH ODS · MedlinePlus · PubMed (19,708) · UL 40 mg (adults, from all sources)
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 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.
zinc — NIH ODS — Zinc fact sheet · PubMed search: zinc supplementation trial · ClinicalTrials.gov — 1,598 registered studies
ℹ Use pattern in research: daily oral use; sustained high intakes can interfere with copper absorption — a documented interaction, not advice.
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 lc-00553797 · built September 03, 2026 · lookcloser.ai · corrections@lookcloser.ai