Youtheory dietary supplement collagen powder is a supplemental source of vitamin c and dietary protein in powder form. Use it to replenish collagen and fight the effects of aging on your skin. This gluten-free, soy-free and dairy-free product contains hydrolyzed collagen. Add one rounded scoop of the powder to water or other liquids. There are about 17 servings per 4.7 oz. Bottle. See nutrition facts panel for allergens.