Advertised health or performance benefit
Evidence →Published research exists for ingredients in this formula — see Related research below. Whether this product’s doses match those studies could not be confirmed.
Exact product checked · GTIN 16500596424ONE A DAY · observed 2026-07-23Package says manufactured by: Bayer HealthCare LLC · Whippany, NJ 07981
Quick read · ONE A DAY
One A Day Men’s 50+ Healthy Advantage Multivitamin
Marketing check: 1 remains partly or independently unverified.
Rebuilt from public sources on July 24, 2026 · evidence availability is not a safety or effectiveness verdict.
Marketing claims, checked
Does the marketing hold up?
Couldn’t verify means public proof was not found; it is not a mark against the product. Ingredient research is not treated as a trial of this exact product.
◐Partly confirmed1
Quick read · 2 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
Checks outWho is behind it?
The barcode identity checks out · 016500596424.
The outside identifier points to this product, so the other checks are less likely to be about a look-alike.
Evidence and sources
Open Food Facts resolves 016500596424 to "oneAday" (One A Day) — consistent with this listing.
Locked evidence record →Open the full source-linked findingChecks outWho is behind it?
Registered in NIH's supplement label database (DSLD)
A government label filing makes the declared formula easier to inspect and compare over time.
Evidence and sources
Label #178201 “Women's 50+ Healthy Advantage” (Bayer One A Day), entered 2018-06-25, with the full Supplement Facts on file — see the panel below. Company on file: Distributor — Bayer HealthCare LLC, Whippany, NJ.
Locked evidence record →Open the full source-linked findingResearch behind the findings
Dose and research context
Ingredient context used alongside the captured panel. These sources do not test this product or establish safety or effectiveness.
Where it sells
Price check for this exact product
Amazon
Exact UPC/GTIN match$18.12
matching UPC/GTIN · observed 2026-07-24T05:26:00.557124+00:00
View on Amazon ↗iHerb
Not confirmedNo exact listing retained
Search results remain unbound until this retailer publishes the matching UPC/GTIN.
Search iHerb ↗Target
Not confirmedNo exact listing retained
Search results remain unbound until this retailer publishes the matching UPC/GTIN.
Search Target ↗Walmart
Not confirmedNo exact listing retained
Search results remain unbound until this retailer publishes the matching UPC/GTIN.
Search Walmart ↗Only one exact price was available at build time; prices change by date, seller, and promotion.
No official brand storefront is confirmed in this record. That is neutral, but it prevents a direct brand-price, label, review, and document check.
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.
Open the full evidence trailSources, edge cases, and every unresolved check
Confirmed evidence
What checked out02
These checks found support in the public record. They confirm specific facts, not the product as a whole.
Full label filed with NIH — ingredients on public record
Label #178201 “Women's 50+ Healthy Advantage” (Bayer One A Day), entered 2018-06-25, with the full Supplement Facts on file — see the panel below. Company on file: Distributor — Bayer HealthCare LLC, Whippany, NJ.
Barcode confirmed in an outside database
Open Food Facts resolves 016500596424 to "oneAday" (One A Day) — consistent with this listing.
Documented concerns
What needs caution00
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 missing04
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 826 on 2026-02-01 to 947 on 2026-07-22 (net +121). 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.
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 016500596424.
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.
Record built July 24, 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.