Mavala Scientifique K+ Nail Hardener is a professional treatment designed to strengthen and protect natural nails. Enriched with Pro-Keratin, this innovative formula helps to rebuild the nail structure, preventing fragility and breakage. Its unique composition allows for faster penetration, promoting firmer, healthier-looking nails without causing irritation. Ideal for soft, brittle, or splitting nails, it can be used as a cure for at least one month. Apply two to three times a week to clean, dry nails, avoiding the cuticle and free edge to prevent potential stiffness.