Mavala Scientifique K+ is a professional nail hardening treatment designed to strengthen weak and brittle nails. This 5ml solution uses advanced keratin technology to bond nail layers together and prevent breaking, splitting and peeling. This penetrating aqueous solution is formulated to target the tip of the nail, which is typically the most fragile and unprotected part. It contains crystal resin tears extracted from the pistachio mastic tree that supports natural nail keratinization. For best results, apply to clean, polish-free nails 2-3 times per week until desired nail strength is achieved. Avoid contact with cuticles and surrounding skin. Can be used under regular nail polish.