Pure Encapsulations Hair/Skin/Nails Ultra provides key building blocks and nutrients to support skin elasticity and hydration, healthy hair, and nail strength and thickness.Vitamin C, zinc, copper, manganese and silica are integral collagen and keratin cofactors, promoting skin elasticity. Optimal levels of these nutrients, as well as folate, have been associated with healthy hair, skin and nails. Recommended Dosage: 2 capsules daily, in divided doses, with meals.