Beauty
Keratin (Solubilized)
Also known as: Cynatine HNS
Hair and nail protein in absorbable form. Provides building blocks for keratin structures.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Hair strength
- Nail strength
- Keratin support
How it works
- Provides keratin building blocks
- May strengthen hair/nails
- Cysteine-rich protein
Dosage
- Typical range
- 500mg daily
- Timing
- Any time
- With food
- Optional
- Duration
- 3+ months for effects
- Special populations
- Weak hair/nails
Forms
- Capsules
Safety
Common side effects
- Rare
Contraindications
- None
Evidence notes
Emerging, less evidence than biotin
Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.