Silica is especially concentrated in the hair, nails and connective tissues such as the skin. Lamberts silica is derived from bamboo gum. Ingredients: One Capsule Lamberts Silica provides: Powdered Bamboo Gum 320mg Providing Silica 200mg Other Ingredients: Encapsulated with: Capsule Shell (Hydroxypropyl Methylcellulose), Magnesium Stearate.Directions: 1 to 3 capsule daily with a meal. Caution: Do not take if pregnant or breast feeding.