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4. Lean Beef

"Lean beef, such as top sirloin, is a great way to get high-quality protein," Zied says. Protein helps build collagen.

Zied recommends having a 2- to 4-ounce serving, just two to three times a week. There are other forms of lean protein you can enjoy on other days.

When you cook beef, flip it often. "Cooking it over super-high heat until it's crispy and charred creates chemicals that will undo all of the anti-aging properties of the beef," Zied says.

Also try: eggs, chicken, tofu, beans, fish.

5. Brussels Sprouts

These are an excellent source of the skin-friendly vitamins A and C, as well as folate.

Their vitamin C promotes collagen. And while you still need to use sun protection, vitamin A and folate may help prevent sun damage.

Try roasting Brussels sprouts with a drizzle of olive oil.

Also try: kale, collard greens, broccoli, cauliflower.

6. Salmon

This fish is one of the best ways to get healthy omega-3 fats in your diet. Recent studies have suggested that omega-3s, especially from fish, may keep skin cancer cells from growing and spreading.

Aim for at least two 3-ounce servings of fish each week. Try it grilled with a whole-grain side dish like brown rice or barley salad.

Also try: flax and chia seeds, walnuts, mackerel, sardines, fortified milk, eggs.

7. Grapes

Resveratrol, which comes from the skin of grapes, counters inflammation, Jaliman says. "Many people think it slows the aging process, plus it may fight the effects of UV light and sun damage. But you still need to use your sunscreen."

Also try: boiled peanuts, cocoa powder.