Silica-OK contains a balanced combination of nutrients in a single tablet. The trace minerals selenium and zinc are included to help contribute to the maintenance of normal hair and nails. Also included in Silica-OK are key B vitamins, such as B2 and biotin which play a role in the maintenance of normal skin, as well as vitamin E which contributes to the protection of cells from oxidative stress. Vitamin C has been added to contribute to normal collagen formation; Collagen is a principle part of our skin and connective tissue. Silica-OK contains a balanced combination of nutrients in a single tablet. The trace minerals selenium and zinc are included to help contribute to the maintenance of normal hair and nails. Also included in Silica-OK are key B vitamins, such as B2 and biotin which play a role in the maintenance of normal skin, as well as vitamin E which contributes to the protection of cells from oxidative stress. Vitamin C has been added to contribute to normal collagen formation; Collagen is a principle part of our skin and connective tissue.