Tretinoin, also known as Tret, is a powerful retinoid used to treat acne, wrinkles, and other skin conditions. It works by increasing collagen production and cell turnover. However, Tret is a prescription medication that can cause dryness, irritation, and sun sensitivity. It's not recommended for pregnant women or people with sensitive skin. If you're considering using Tret, consult a dermatologist first. T