Martiderm Black Diamond Proteum Serum helps fight wrinkles, firm and protect the skin against aging. With triple action: anti-wrinkle, firming and antioxidant. Stops aging, reduces lines and wrinkles. Stimulates natural cell regeneration and protects the skin against daily external aggressions. Increases skin firmness, elasticity and luminosity. Provides hydration and softness, with a pearlescent finish. Ideal for mature skin.