A testing body is named on the brand page (NSF), but we found no lot-specific certificate of analysis.

Vitamin D3 K2 5000 IU 120mcg Magnesium Zinc B6 Quercetin…
Checked against public sources on August 3, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
Every ingredient shows its amount · 6 ingredients listed. Every ingredient shows its real amount — nothing is hidden in a proprietary blend.
“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.
What the Supplement Facts panel says
| Vitamin D3 (as cholecalciferol) | 125 mcg (5000 IU) |
|---|---|
| Vitamin K2 (as menaquinone-7) | 120 mcg |
| Vitamin B6 (as pyridoxal-5-phosphate) | 3.4 mg |
| Magnesium (as magnesium citrate) | 25 mg |
| Zinc (as zinc monomethionine chelate complex) | 11 mg |
| Quercetin (as quercetin dihydrate) Japanese sophora (Sophora japonica) (flower buds) extract | 50 mg |
Printed on the package: Third Party Lab Tested · Gluten & Dairy Free · Third-Party Lab Tested · Practitioner's Formulated · Third- Party Tested · GMP QUALITY
We read 6 lines from the package photograph. It is our transcript of the label, not the manufacturer’s panel, and it may be incomplete.
The checks, one by one
The public sources did not settle the marketing promises on this label.
◐Partly confirmed3
“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.
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.
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
Every ingredient shows its amount · 6 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 findingReviews rose from 2 to 22 between July 23, 2025 and July 7, 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 2 to 22 between July 23, 2025 and July 7, 2026. The largest rise inside any single 30-day window was about 6, so the count moved in steps rather than in one burst.
Locked evidence record →Open the full source-linked findingWhat remains open 3
- No FDA recall matched this brand in the current search.
- We have not found a public label filing for this exact product.
- Barcode checksum is valid; no independent product record was found.
These are evidence gaps, not strikes against the product.
Filed address
4580 Contractors Place, Livermore, California 94551, UNITED STATES
USPTO identifies the public owner or applicant behind this brand wordmark. This does not by itself identify the product manufacturer or prove where the product was made. Open USPTO source ↗
Dose and research context
The label amount is shown beside the range used in the linked ingredient studies.
Magnesium
25 mg per serving — below the 200–420 mg/day used in the linked studies.
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 25 mg of magnesium per serving. Studies we found used 200 mg–420 mg a day, so this sits below that range.
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.
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
Price check for this exact product
Amazon
Exact UPC/GTIN match$0.46 per labeled serving
matching UPC/GTIN · checked Aug 4, 2026
View on Amazon ↗Brand website
Official product-page candidate · UPC absentOfficial shopping lead; excluded from exact price comparisons.
Vitamin D3 + K2 Supplement · 1. Confirm the package UPC/GTIN before buying.
Check brand website ↗iHerb
Not confirmedWe only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search iHerb ↗Target
Not confirmedWe only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Target ↗Walmart
Not confirmedWe only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Walmart ↗Only one exact price was available at build time; prices change by date, seller, and promotion.
The brand-page price is shown as a shopping lead only. It is excluded from the exact-product price difference because the page does not publish this record's matching UPC/GTIN.
Reference prices only · no affiliate links · every compared seller must publish the matching UPC/GTIN.
Want the complete evidence trail?
The summary stops at product-specific facts. The full report preserves every source, calculation, limitation, and unresolved check for review or sharing.
Record built August 04, 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.