With Horsetail Extract,Promotes Hair, Skin and Nail Health,Supports Joint Structures.Silica is a naturally occurring element necessary for the production of collagen and elastin, two structural proteins important for the health of skin, hair, and nails. It is also a component of these bodily structures. NOW Silica Complex is a unique blend of nutrients that support the health of skin, hair, and nails, structural features essential to natural beauty, along with the integrity of joints and bones.