BIOTIN · 10 mg per serving
Evidence →The same-name panel row declares 10 mg per serving, matching the 10 mg listing claim.
Exact product checked · barcode not publishedRainbow Nutrients, LLC · observed 2026-07-23
Quick read · Rainbow Nutrients, LLC
Hair Growth Vitamins for Women | Biotin 10,000mcg
Marketing check: 1 checks out, 4 remain partly or independently unverified.
Rebuilt from public sources on July 23, 2026 · evidence availability is not a safety or effectiveness verdict.
120capsules · 60 servings
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.
✓Checks out1
◐Partly confirmed1
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.
?Couldn’t verify independently3
GMP or manufacturing-quality language
Evidence →Facility-level claims can be accurate and still say nothing about this product’s contents. No registration document was located.
US manufacturing or origin language
Evidence →“Made in USA” can describe only final bottling. Ingredient-sourcing records were not located for this product.
1 more public-evidence limit
“Third-party tested”
Evidence →No named laboratory or lot-specific certificate was found for this exact product. No exact brand product page was available for a document check. NSF, IFOS, USP, and Informed-Sport were not checked in this record. This is a public-evidence limit, not a finding that testing did not occur.
Quick read · 2 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
Checks outIs the label honest?
Listing claim matches the Supplement Facts panel
What is advertised is what the label declares. This checks internal consistency; it is not an independent test of the contents.
Evidence and sources
The listing claims 10 mg; the photo-read Supplement Facts panel shows Biotin at 10 mg per serving — the listing text and its photo-read panel agree; this is internal consistency, not independent testing.
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.
Dose vs research
0.01 g declared
The panel declares 0.01 g per serving, in the 2.5–15 g/day context cited in the research.
Comparison, not a safety verdict
Want to inspect the evidence?
The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Open the full evidence trailSources, edge cases, and every unresolved check
Confirmed evidence
What checked out00
These checks found support in the public record. They confirm specific facts, not the product as a whole.
Nothing could be independently confirmed from the available record.
Documented concerns
What needs caution01
These are documented contradictions or claims that need more evidence. They are separate from missing data.
Unresolved public record
What is still missing05
We looked for these signals but could not settle them from public sources. A gap is not a strike.
“Lab tested” claimed, but no lab or report named
The observed listing claims third-party testing without naming a lab or certifier. No product-bound report is retained, so the claim cannot be verified as stated. NSF, IFOS, USP, and Informed-Sport were not checked in this record.
Listing claim matches the label panel
The listing claims 10 mg; the photo-read Supplement Facts panel shows Biotin at 10 mg per serving — the listing text and its photo-read panel agree; this is internal consistency, not independent testing.
Research context is available for the listed ingredients
Published sources describe how collagen peptides, zinc have been studied. This is ingredient context only; the record does not establish that this product delivers the studied dose or outcome. Sources: PubMed search: collagen peptide supplementation trial, WebMD search: collagen.
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 586 on 2026-01-31 to 831 on 2026-07-21 (net +245). 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
Answered by the panel: the 0.01 g listing number equals Thiamin (as Thiamin HCI) 5 mg + Riboflavin 5 mg. What lot-specific document confirms those declared amounts?
The panel resolves what the headline number includes. The remaining question is whether the product in hand matches those declared amounts; ask for a lot-specific certificate of analysis.
2
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.
3
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.
4
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.
5
Where are the ingredients sourced, and where is the product manufactured?
“Made in USA” can describe only the final bottling step. Ask which country the actives came from and whether the facility is audited.
6
What is the amount of each ingredient inside the proprietary blend?
A blend total tells you nothing about whether any single ingredient reaches a dose used in research. Brands may decline — that answer is informative too.
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.
Record built July 23, 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.