NatureWorks Body Essential Silica Gel is a citrus flavored dietary mineral supplement for nails, hair, skin and connective tissue. Silica is a natural compound that is essential to all living things. In fact, Silica is such a necessity that it has been labeled nature's building block. NatureWorks Body Essential Silica Gel is your key to stronger nails, shinier hair, healthier looking skin, and stronger connective tissue.