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 its a must have kd directions of use massage into expression lines and creases which generally appear along the forehead betwe