This Acyl Deep Crease Serum by Perricone MD is the ideal non invasive alternative to achieve a youthful appearance. An innovative, super powerful anti-ageing treatment, this serum is formulated with Acyl-Glutathione to relax facial expressions and Vitamin C to give radiance and a younger look. Boasting a visible soothing effect of all these creases in the skin, it's a must have! K.D. Directions of use: Massage into expression lines and creases which generally appear along the forehead, between the eyebrows, and along the contours of the mouth Use morning and evening