What is Tretinoin? Also known as all-trans retinoic acid, is a derivative of vitamin A. It belongs to a class of compounds called retinoids, which are renowned for their skin-rejuvenating properties. It is available in prescription strength and is commonly used to treat acne, reduce signs of aging, and improve overall skin texture and tone. https://worldclasstretinoin.com/shop/a-ret-0-025-gel-tretinoin-0025/