You can head off a lot of your most common beauty concerns simply by downing the right foods. That's right—eating well not only does wonders for your waistline andbolsters your immune system but can also provide some very real get-gorg benefits, such as smoothing wrinkles, giving hair a glossy shineand strengthening flimsy nails. "Your diet directly affects your day-to-day appearance and plays a significant role in how well you age," says Joshua Zeichner, MD. The smart approach, Dr. Zeichner says, is to create a plan that includes what he calls "the building blocks of healthy skin and hair"—nutrients, minerals and fatty acids—as well as antioxidants to protect your body from damaging environmental stresses. Get ready to nab some beauty-boosting perks by tossing these essential face-saving edibles into your grocery cart.