The influence of nutrition on the skin is really underestimated, says Alan Logan, a naturopathic doctor and author of The Clear Skin Diet (Cumberland House). “Over the long term [poor diet] can influence the production of inflammatory chemicals in the skin that could lead to acne and other skin conditions,” says Logan. “According to research, that could translate into higher risk of developing fine lines and wrinkles.” Cut back on these three foods to help your skin look younger and healthier.