Also known as: Cynatine HNS
Hair and nail protein in absorbable form. Provides building blocks for keratin structures.
3+ months for effects
Weak hair/nails
We haven’t curated landmark studies for Keratin (Solubilized)yet — one-click into the primary literature here. PubMed (RCTs) is usually the highest-signal starting point.
Emerging, less evidence than biotin
Insufficient data
Safe
Other ingredients in the Beauty category.
Formulate Research Team. (2026, September). Keratin (Solubilized) — Evidence-Based Supplement Guide. Formulate Supplement Encyclopedia. https://app.formulate-health.app/learning/supplements/keratin
Educational content based on published research and our scoring methodology. Not medical advice — consult a qualified healthcare provider before starting, stopping, or changing supplements, especially if you take medications, are pregnant, or have a medical condition.