Apply Retinol carefully—more is actually worse

Retinol is a form of vitamin A that is used to combat acne as well as the signs of aging by spurring skin turnover and increasing collagen. It is available in prescription-strength formulas through a dermatologist, but can also be found in lower concentrations in cosmetics and creams. Although people might be tempted to apply it often, Dr. Schweiger says that will only irritate the skin more."