atures: It is a biphasic night serum against wrinkles with retinaldehyde, which helps to accelerate skin renewal. Formulated with retinaldehyde, it visibly reduces wrinkles and fine lines for smoother, more even, younger-looking skin. How to use: Dose two pumps of product and mix both phases until a homogeneous color is achieved. Apply a thin layer to a clean and dry face, avoiding the eye and mucous membrane contours.