Keratin
Cross-source consensus on Keratin from 1 sources and 5 claims.
1 sources · 5 claims
How it works
Benefits
Risks & contraindications
Highlighted claims
- Nails are made of keratin, a structural protein with exceptionally high sulfur content. — Deeper Causes of Brittle Nails
- The number-one symptom of sulfur deficiency is brittle nails. — Deeper Causes of Brittle Nails
- Cysteine and methionine are the two sulfur-containing amino acids most critical for keratin integrity. — Deeper Causes of Brittle Nails
- Trace minerals act as cofactors and coenzymes that activate keratin production proteins; without them, structural proteins cannot function even when amino acid supply is sufficient. — Deeper Causes of Brittle Nails
- Vitamin A supports the structural integrity of keratin. — Deeper Causes of Brittle Nails