Tretinoin is a popular topical medication that promotes rapid exfoliation and stimulates the production of collagen and elastin. It can help treat conditions such as sun damage, fine lines, and severe forms of acne. Tretinoin comes in gel and cream formulations, with concentrations ranging from 0.01% to 0.25%. The strength you choose is based on your unique skin type.
Source: https://writeonwall.com/whats-the-difference-between-tretinoin-gel-and-cream/