The review count moved gradually, not in one burst
Written reviews rose from 1,084 to 1,113 between February 19 and July 20, 2026. The largest rise inside any single 30-day window was about 13, so the count moved in steps rather than in one burst.
Full record · 047469068851 · back to the summary
Natrol Biotin 10000mcg, 4X Faster Dissolve Supplement for Healthy Hair
Exact product checkedGTIN 00047469068851 · checked 2026-07-26
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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
The 10 mg biotin claim matches the panel
MARKETING10 mg — listing title
PANELBiotin 10 mg — same amount
matches panelWe did the comparison: the listing claims 10 mg of biotin, and the listing-image panel shows 10 mg biotin 1 tablet. Those amounts agree. This is internal consistency, not independent lab testing.
| Panel row | Amount | %DV | What to notice |
|---|---|---|---|
| Biotin | 10,000 mcg %DV | — |
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; any remaining comparison concerns the front-label framing.
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 out1
These checks found support in the public record. They confirm specific facts, not the product as a whole.
Confirmed
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 missing7
We looked for these signals but could not settle them from public sources. A gap is not a strike.
Multiple USPTO brand-owner records are shown
USPTO returned multiple live supplement-class records for the exact brand wordmark: NATROL, INC., Natrol, Inc., Natrol LLC. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open.
Panel amounts are awaiting a clearer image read
The current image extraction saved 1 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.
FDA recall appears in this brand's history
This recall is not about the product on this page. Natrol, LLC recalled a different product on April 8, 2021. FDA has since closed that case. The recalled item was “Natrol Melatonin 3 mg, Tab 60 White bottle with purple flip-top cap. Fall asleep faster, Stay asleep longer, 100$ Drug Free 1 Tablet 20 minutes before bedtime. Manufactured by N”. FDA recorded the reason as “One lot of ALA 300 mg Cap-50 were labeled at Melatonin 3 mg Tab-60”. Verify at FDA’s recall database.
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 1,083 on 2026-02-05 to 1,113 on 2026-07-20 (net +30). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.
UPC valid, no independent record
Check digit passes; no third-party database record found yet. Coverage gaps are common — not a strike.
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
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
Scan the barcode on the package and confirm it reads 047469068851.
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 |
|---|---|---|
| Benefit claim “…Those Low in Biotin, Plus Energy Metabolism Support, 60 Tablets, Up to a 60 Day Supply BIOTIN SU…” | Not checked yet We looked for: whether the ingredient doses on the label match the doses used in published research | Ingredient-level evidence for this formula isn’t in our knowledge base yet. Recorded as not checked yet — not as a negative. |
“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.
Verifiability profile — 3 of 6 public signals
✓ UPC / GTIN published✓ Supplement Facts visible in photos✓ Brand's own store found· Per-serving dose established — not published· Found in NIH's label catalog (DSLD) — not published· Third-party lab named or registry-certified — 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 | 047469068851 — via source listing UPC |
| Brand | Natrol |
| Source listing identifier | B00JKK3MAG |
| Retailer listing title | Natrol Biotin 10000mcg, 4X Faster Dissolve Supplement for Healthy Hair… show full titleNatrol Biotin 10000mcg, 4X Faster Dissolve Supplement for Healthy Hair, Skin and Nails for Those Low in Biotin, Plus Energy Metabolism Support, 60 Tablets, Up to a 60 Day Supply |
| USPTO brand-owner record | NATROL, INC. · CALIFORNIA, USA; DELAWARE, USA · registration 1532608 · 21411 Prairie Street, CHATSWORTH, CALIFORNIA 91311, UNITED STATES |
| USPTO brand-owner record | Natrol, Inc. · DELAWARE, USA · registration 2906488 · 21411 Prairie Street, Chatsworth, CALIFORNIA 91311, UNITED STATES |
| USPTO brand-owner record | Natrol LLC · DELAWARE, USA · registration 5643583 · 21411 Prairie Street, Chats, California 91311, UNITED STATES |
| USPTO brand-owner record | Natrol LLC · Delaware, USA · registration 8235633 · 21411 Prairie Street, Chatsworth, California 91311, UNITED STATES |
From the label (photo-read)
| Serving size | 1 Tablet |
| Servings per container | 60 |
| Pack statement | 60 Tablets |
Supplement Facts panel (photo-read):
| Ingredient | Amount per serving | Reading confidence |
|---|---|---|
| Biotin | 10,000 mcg %DV | High clearly legible in the photo |
Claims printed on the packaging:
“FAST DISSOLVE” · “Supports healthy hair, skin & nails for those low in biotin” · “100% DRUG FREE” · “MAXIMUM STRENGTH” · “VEGETARIAN” · “Strawberry Natural Flavor” · “Great-Tasting Tablets” · “Fast Dissolve Formulation”
Read by a vision model from 7 listing photos — verbatim extraction; OCR errors possible. Spot a mistake? It will be corrected on review.
Where it sells
| Seller | Price |
|---|---|
| Retailer listing ↗ | $9.09 checked Jul 26, 2026 — varies by variant/session; price history pending |
Brand store natrol.com: 41 supplement products (+9 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
No knowledge-base entry yet for this formula's active ingredients — entries are added as the KB grows. Absence of a science card is a coverage gap, not a judgment.
Ingredient science — NIH references
Biotin — NIH ODS · MedlinePlus · PubMed (1,606) · no UL; high doses interfere with lab tests
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.
Record 047469068851 · built July 26, 2026 · lookcloser.ai · corrections@lookcloser.ai