(Reserveage Organics) World’s first bioavailable Keratin actually binds to hair, strengthening it and helping to minimize hair loss while improving shine and brightness. May improve nails with enhanced strength and flexibility. Finally, Keratin may also reduce fine lines and wrinkles, promote firmness and elasticity, and improve radiance of skin. Contains 3000 mcg of biotin and 40 mg of resveratrol. 1 month supply.