Ret A Gel, 0.1% 20gm, is one of the most preferred topical drugs in mild to moderate acne treatment. It has Tretinoin as the active ingredient, which belongs to the class of Retinoids. Tretinoin improves pigmentation by speeding up the elimination of melanin in the dermis. It also increases collagen levels in the skin cells and improves fine wrinkles. It does not, however, affect deep converges formed on the skin and ice pick scars. This medicine all improves the overall quality of the skin. Tretinoin, an active ingredient of the medicine, is a very active exfoliator that accelerates the skin cycle. The medicine is amazingly effective for whiteheads and blackheads, but it takes at least months to see a noticeable difference in the appearance of acne.