Retinol, tretinoin, and vitamin A are three ingredients that are connected in some ways. However, they are not one and the same.
Retinol is a weaker over-the-counter version of tretinoin, which is a prescription vitamin A derivative. It is highly effective in reversing sun damage and signs of aging. Both retinol and prescription tretinoin have been shown to have an effect on the skin. It’s used in acne treatment, reversal of sun damage (photo-aging), and to improve skin smoothness, texture, and to decrease fine lines and inflammation from rosacea.