Retin-A is a trademarked brand name for Tretinoin, a retinoic acid cream used to treat acne and keratosis pilaris; it is claimed that it stimulates skin cell turnover and smoothes wrinkles. It is used by some as a hair loss treatment.
Side effects and sunscreen use
When used, dryness of the affected skin may occur. Application of sunscreen while using Retin-A is strongly recommended.