Ahava?s Dead Sea, mineral rich Nail Hardener, strengthens fingernails and helps prevent chipping, cracking and breaks while it nourishes the nail tissue from within. Formula features calcium, magnesium, Pro-Vitamin B5, silica and camphor. Hypoallergenic ? Dermatologically Tested ? Not Tested on Animals Directions: Apply daily for 4 weeks, removing previous layer before reapplying. Then use once a week.Other products from AHAVA