Essential fx rejuvenating moisturizer a nutrient-packed and firming moisturizer, with a rich, velvety texture. It moisturizes deeply, yet absorbs quickly, without leaving any greasy or leftover residue. Formulated with acyl-glutathione to visibly reduce deep wrinkles and folds, along with a vitamin f blend to improve the skin's moisture barrier, this visibly rich moisturizer provides optimal nutrition to help treat dry, tight skin. How to use massage onto cleansed face and neck in a gentle upward motion. Use morning and evening. For best results, apply after your favorite perricone md serum or facial cream. Science cyl-glutathione: the master antioxidant made up of three amino acids, glutathione is the body's primary antioxidant and helps reduce the appearance of deep folds and improve fragile skin by protecting, repairing and detoxifying. Fat-soluble for maximum stability and penetration. Vitamin f blend: ultimate barrier protection flaxseed, chia and macadamia seed oils restore suppleness and create a healthy glow by intensely hydrating and improving the skin's protective barrier. Essential but not found naturally in the human body.