Nail Repair Topical Solution: Kerasal is clinically proven to improve the appearance of nails damaged by fungus (onychomoycosis) and even improves the appearance of nail psoriaisis QUICKLY IMPROVES NAIL APPEARANCE: Multi-Purpose Nail Repair is clinically proven. It reduces discoloration, normalize thickness & hydrate brittle nails. See a visible difference in as little as one week! RENEW & REPAIR: Revitalize fingernails & toenails by penetrating and softening the damaged layer of the nail. This solution comes in a clear & odorless formula that's easy to apply with the included brush.