YOU NEED TO EAT A well-balanced diet to have healthy-looking skin. To fight wrinkles, though, certain foods are a must, says Alison Levitt, M.D., a holistic family physician in Asheville, N.C. Most anti-wrinkle foods are rich in antioxidants, which neutralize the effects of free radicals that attack your skin's collagen and elastic tissue, forcing them to lose their firmness. Levitt and other skin experts consider these five the best. Other anti-wrinkle habits: Drink four to six glasses of water daily; wear sunglasses, a hat, and sunscreen when in the sun; don't smoke.