Keratin Booster. Features: Repairs, nourishes, and strengthens damaged nails. Fast-acting nail hardener between polish applications. Ultra-fluid, non-greasy, non-sticky formula. Nail strengthener for damaged nails. Absorbs quickly with no residue. Promotes nail strengthener and growth. Vegan & Plant-based. Cruelty Free. Made in France. Key Ingredients: Plant-based Keratin: Intensely nourishes and reinforces fragile nails. AHA & Gluconolactone: Gently exfoliate and smooth the nail surface. Silicon: Strengthens nail structure. Biotin (Vitamin B8): Hardens and fortifies nails. Vitamin C: Protects nails from external aggressions. Research Results: Proven results*. Hydrated nails 85%. Harder nails 85%. Nourished nails 85%. Stronger nails 81%. More beautiful nails 81%. Less split nails 81%. Healthier nails 81%. Regenerated nails 81%. *Clinical test conducted on 21 women after 3 weeks of use.