Mavala Scientifique K+ is a professional nail hardening treatment that strengthens weak, soft, and brittle nails. This scientifically formulated solution contains Pro Keratin to improve nail structure and prevent splitting and breaking. This is a nail care product that should be applied only to the free edge/tip of the nail, avoiding contact with cuticles and surrounding skin. For best results, use 2-3 times per week until desired nail hardness is achieved, then reduce frequency for maintenance. The formula works by strengthening the keratin bonds in the nail plate.