1 Product identity
Ingredient risk
2 ingredients to use with caution
Keratin Formula
BrandNature's Bounty Optimal Solutions→Other Combinations Capsule 12 ingredients 2 caution DSLD #49568Net contents: 50 Capsule(s)
Target: Adults and Children 4 years and above
DSLD entry: 2015-08-25
2 Ingredients (12)
IngredientGroupSafety
Grapeseed extractGrape —
GelatinGelatin—
Contains Less Than 2% ofBlend—
Ingredient amounts require the full DSLD label. View full label at NIH DSLD →
⚠️ Use with caution — restricted in some markets
Vitamin B6 — Sensory neuropathy from chronic high-dose B6 (>200 mg/day) — presents as numbness, ataxia. Can be irreversible. Often self-prescribed by patients…
Zinc — Chronic zinc >40 mg/day without copper causes copper deficiency: anemia, neutropenia, myeloneuropathy [1].
3 Safety cross-reference
Niacin — Conditionally Safe
⚠ Flushing at >50 mg
⚠ Hepatotoxicity at high doses
Vitamin B6 — Use with Caution
Biotin — Generally Safe
⚠ Interferes with troponin and thyroid lab assays
Pantothenic Acid — Limited Evidence
⚠ Diarrhea at very high doses
Zinc — Use with Caution
⚠ Copper deficiency at >40 mg/day
⚠ Nausea, metallic taste
Copper — Conditionally Safe
⚠ Hepatotoxicity at high doses
Keratin — Generally Safe
⚠ Limited efficacy data
⚠ Source: sheep wool or feathers
Resveratrol — Conditionally Safe
⚠ Estrogenic activity
⚠ CYP enzyme inhibition
Calcium — Conditionally Safe
⚠ Cardiovascular risk debated >1,000 mg/day
⚠ Kidney stones
4 Label claims
• All Other
• Structure/Function
5 Data source
DSLD ID49568
Full labelView at NIH DSLD →
SourceOffice of Dietary Supplements, NIH
Market statusOn market
Entry date2015-08-25
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Vancouver
Pkhakadze G. Keratin Formula — product analysis [Internet]. Tbilisi: Public Health Institute of Georgia; 2026 [cited 2026 Aug 25]. Available from: https://supplement.ge/products/keratin-formula-49568/
CC BY 4.0. Product data from NIH DSLD; safety analysis by SupplementIndex.
GP
Analyzed by SupplementIndex
PHIG · Editor-in-Chief: Prof. Giorgi Pkhakadze, MD, MPH, PhD
Product data sourced from the NIH Dietary Supplement Label Database (DSLD). Safety cross-referencing by SupplementIndex. This analysis is for informational purposes only. For corrections: info@accreditation.ge.
Publisher: PHIG
Publisher: PHIG