Retinol is the most popular anti-aging and wrinkle-fighting ingredient in the skincare industry. It’s a must-have for every dermatologist and skincare enthusiast. So, what is retinol? It’s a synthetic derivative made of vitamin A–based formulas that is applied to the skin. Retinoids increase the production of collagen, which helps treat acne, prevent dullness, plump dull skin, and minimize fine lines. With varying levels of retinol, you have the option of finding the best retinol product that is most effective for even the most delicate skin.