Dr. Berman's™ Retinol Serum revitalizes, rebuilds, restores, and renews the skin by providing the first stable form of retinol, a clinically proven form of vitamin A that exfoliates dead and damaged skin cells and stimulates the body's production of collagen, one of the key building blocks of skin. Dr. Berman's™ RxA3 Creme is designed especially for sensitive skin and combines three forms of vitamin A that support cell rejuvenation and collagen renewal and aid in the visible reduction and prevention of lines, wrinkles, and age spots. With milder active ingredients than Dr. Berman's™ Retinol Serum, this cream is designed as a supplement boost to Retinol Serum or to be used on its own. It is excellent for sensitive, allergy-prone, or dry skin. The Magic of Retinol Skin relies on vitamins to function properly, and skin cell growth requires vitamin A. Retinol is vitamin A in its purest and most active form. Applied externally, it penetrates deep into the skin, where it becomes fully operative. The appearance of wrinkles and lines are gradually smoothed, moisture and elasticity increase, the complexion glows, and damage is visibly diminished. After just a short time, the skin looks fresher, clearer, and more youthful.