Maximum strength formula provides the highest level of protein cross-linking for harder, longer, stronger natural nails. Ideal for weak, damaged nails. Maximum strength formula with Hydrolyzed Protein and Calcium helps nails grow harder, longer and stronger and resist peeling, cracking and splitting. Specifically made to strengthen your natural nails that are soft and thin. This formula is fortified with extra calcium and sea minerals. Adds a layer of protection to bulk up soft nails.