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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.

    Have a 2- to 4-ounce serving just two to three times a week, she says. You can enjoy different kinds of lean protein 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 a great 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.

    If you remember Brussels sprouts with dread because you had them boiled when you were a child, take heart: You can roast them with a drizzle of olive oil and find them much tastier.

    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. Some 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. Enjoy 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.