Everything You Need to Know About Tretinoin-The Anti-Aging Ingredient Derms Swear By | Tretinoin, a type of retinoid frequently used to treat acne, is getting new life as an anti-aging ingredient, and dermatologists say it can be extremely effective in reversing signs of aging like fine lines and dark spots. Click here to read all about this life-changing beauty product. #beauty#beautytips#antiaging#realsimple