China Glaze Calcium Gel Fortifier Fortified base coat helps thin weak nails grow long and strong. For those who experience weak or splitting nails, This thicker gel provides a more substantial coating than a typical nail strengthener. This formula contains Vitamin B3 and Panthenol which is pro Vitamin B5 and present in all living cells in the form of Panthothenic Acid. The presence of Panthenol promotes moisture retention which prevents drying and splitting of nails.