LookCloser.aipublic supplement evidence
Exact product checked · GTIN 00016500602477ONE A DAY · checked Aug 1, 2026 · on sale since Oct 8, 2024🇺🇸 USPTO wordmark owner · Bayer HealthCare LLC · DELAWARE, USA
Quick read · ONE A DAY

One A Day Energy Daily Essentials Multivitamin

Checked against public sources on August 1, 2026 · LookCloser does not sell or recommend supplements.

120tablets

Does the marketing hold up?

Every ingredient shows its amount · 23 ingredients listed. Every ingredient shows its real amount — nothing is hidden in a proprietary blend.

Is the dose real?Panel read — dose not verified23 ingredients listed; no advertised amount we could confirm against them
What a serving costsNo price found for this exact barcode
Is it tested?No testing claim made
Who’s behind it?🇺🇸Bayer HealthCare LLClimited liability company · DELAWARE, USA
Is it the real thing?Barcode matches outside records
Trouble on record?No recalls found

“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.

1◖ partly confirmedno contradictions · no recalls
The label itself

What the Supplement Facts panel says

Serving size One tablet

Vitamin A (40% as beta-carotene)1050 mcg
Vitamin C60 mg
Vitamin D10 mcg
Vitamin E10.1 mg
Thiamin (B1)3 mg
Riboflavin (B2)3.4 mg
Niacin40 mg
Vitamin B64 mg
Folate665 mcg DFE
Vitamin B1212 mcg
Biotin300 mcg
Pantothenic Acid10 mg
Calcium250 mg
Iron9 mg
Iodine150 mcg
Magnesium40 mg
Zinc15 mg
Selenium45 mcg
Copper2 mg
Manganese2 mg
Chromium100 mcg
Molybdenum25 mcg
Caffeine90 mg

We read 23 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 confirmed1

“One A Day Energy Daily Essentials Multivitamin, Energy Supplement to Support Mental Alertness and Immune Health with Vitamins A C, D, E, Zinc and…”

Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed.

Evidence →

Ingredient research can support context, but it is not a trial of this exact product.

Quick read · 2 useful findings

What is worth knowing.

Headlines first. Open evidence only when you want the source trail.

CheckedIs the label honest?

Every ingredient shows its amount · 23 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 finding
CheckedCan you trust the review pattern?

Reviews rose from 115 to 228 between July 9, 2025 and July 24, 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 115 to 228 between July 9, 2025 and July 24, 2026. The largest rise inside any single 30-day window was about 31, so the count moved in steps rather than in one burst.

Locked evidence record →Open the full source-linked finding
What 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.

Who owns the brand wordmark?
🇺🇸
Bayer HealthCare LLCLimited Liability Company · exact supplement-class mark for ONE A DAY
Registration5198339
Registered2017-05-09
AssignmentsNo transfers recorded

Filed address
100 Bayer Boulevard, Whippany, NEW JERSEY 07981, 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 ↗

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 40 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 15 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.

Where it sells

Price check for this exact product

Amazon

Exact UPC/GTIN match
$18.99

matching UPC/GTIN · checked Aug 1, 2026

View on Amazon ↗

iHerb

Not confirmed
No exact listing saved

We 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 confirmed
No exact listing saved

We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.

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Walmart

Not confirmed
No exact listing saved

We 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.

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.

Read / share full evidence →

Record built August 02, 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.