Proven complexion perfecters

Pile these on your plate. All pack nutrients essential for healthy skin.

Strawberries, citrus fruits, red peppers, broccoli

Beauty benefit: a smooth texture

Eat-right evidence: Vitamin C, plentiful in this produce, is vital for the production and formation of collagen, skin's support structure, says Toby Amidor, R.D., director of nutrition for DietTV.com in New York City. And a strong support layer helps smooth what's on top and prevent wrinkles, she says. Aim for: two 1-cup servings of fruit and 1 cup of red peppers and/or broccoli a day

Sunflower seeds and almonds

Beauty benefit: sun protection

Eat-right evidence: These seeds and nuts are loaded with vitamin E. Collectively, antioxidants act like an army, protecting skin from UV-spawned free radicals. But E is on the front lines; skin's top layers contain high levels that guard cells' outer membrane so cells stay healthy. Plus, strong membranes hold water in, keeping skin hydrated. Aim for: 2 tablespoons hulled seeds or 23 almonds daily

Dark orange, leafy green and red veggies

Beauty benefit: a fresh complexion

Eat-right evidence: Squash, sweet potatoes and spinach are full of the antioxidant beta-carotene. Your body converts it to vitamin A, which regulates cell production and turnover so skin's surface is smooth, says Valori Treloar, M.D., coauthor of The Clear Skin Diet (Cumberland House Publishing). Carotenoids may also decrease skin's sensitivity to sun. Aim for: three 1-cup servings a day

Fortified cereal, lean meat, pork, poultry, oysters

Beauty benefit: a youthful glow

Eat-right evidence: You'll get zinc and iron, minerals key to skin functioning. Zinc contributes to cell production, plus natural cell sloughing, which keeps dullness at bay. Red blood cells need iron to carry oxygen to skin, helping give you a glow, says David Bank, M.D., a derm in Mount Kisco, New York. Aim for: 1 serving of cereal (a cup), 1 palm-sized serving of meat or poultry or 3 oysters per day

Water

Beauty benefit: dewy skin

Eat-right evidence: Skin cells contain mostly water, and if you're dehydrated, skin will look and feel parched, too. But you needn't chug 8 cups a day; University of Pennsylvania researchers found no studies to back up the recommendation. Simply ward off dehydration—and dryness—by drinking when you're thirsty. Aim for: 6 cups a day. It's a good starting point, says Keri Gans, R.D., of NYC.

Smart skin suggestions

New research hints at these foods' beauty power, but effects aren't totally proven yet. No need to wait, though; the goodies are part of a healthy diet.

Wild salmon, Atlantic mackerel, walnuts

Beauty benefit: fewer wrinkles

Eat-right evidence: These fish and nuts, plus fortified eggs, are bursting with omega-3 fatty acids, which fight inflammation in the body caused by sun and stress. "Inflammation produces free radicals, and free radicals contribute to aging by attacking collagen," says Susan Taylor, M.D., a dermatologist in Philadelphia. But research still needs to connect the dots definitively and show that the anti-inflammatory abilities of omega-3s translate to younger-looking skin, she says. One study did find that older people who consumed more fish and veggies over their life had fewer wrinkles than those who ate more meat, the Journal of the American College of Nutrition reports. The research didn't focus solely on fish, however; vegetables' antioxidants, for example, may have been a factor. Aim for: two 5-ounce servings of fish per week; on other days, 1 oz of walnuts or 2 omega-3 eggs