Factor-A is an esterified form of vitamin A propionate that can significantly assist in regenerating the appearance of photoaged skin, as well as aiding in clearing problem prone skin. James Fulton, M. D., co-inventor of Retin-A, developed this remarkable non-prescription product and has succeeded in lessening the side effects associated with Retin-A by 80%. Factor-ATM is also compatible with a glycolic acid skin care program, further enhancing the overall benefits. FACTOR-A LOTION FACTOR-A PLUS LOTION FACTOR-A CREAM FACTOR-A PLUS CREAM Factor-A and Factor-A Plus are cutting edge technologies that fall into the category known as Retinoids. Retinoids are a group of naturally occurring and synthetic compounds that have Vitamin A-like biological activity. They play a critical role in skin growth, repair and epithelial cell differentiation. In the past 20 years, tremendous research has focused on certain Retinoids, particularly retinoic acid, for the purpose of treating various skin abnormalities including acne, actinic keratoses (pre-cancerous lesions) and skin changes due to photodamage and aging.