Low-Fat

Health.com: The Best Diets For Your Skin

Eat More, Weigh Less

The lowdown: Cutting down on saturated fat is great for your heart and waistline. A diet low in animal fat also stems the production of free radicals that can prematurely age skin, Dr. Airan says.

Still, your skin needs some fat, especially the good kind found in nuts and olive oil. Fat helps your body absorb complexion-friendly antioxidants and fat-soluble vitamins, and strengthens cell membranes—and ultimately your epidermis—for a dewier, more supple face.

"Get at least 20% of your calories from fat, mainly the unsaturated kind," says dermatologist Cheryl Karcher, MD.

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Is Your Diet Tra...

Sure, your diet keeps your body slim and healthy, but its impact doesn’t stop there. The food you eat—from wrinkle-fighting antioxidants in fruits and vegetables to hydrating healthy fats in fish—may matter to your skin almost as much as it does to your waistline. Is your way of noshing helping or hurting your complexion? We asked top docs for their take on the face-friendliness of six popular diets. Read on to see if yours passes the beauty test, and find out how you can alter what you eat for A-plus skin.

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Mediterranean

The Mediterranean Diet, The Mediterranean Prescription

The lowdown: Fish, leafy greens, olive oil, and fruit are the stars of this heart-healthy diet. But the benefits don’t end there—eating Mediterranean may also protect against melanoma, the deadliest form of skin cancer, a recent Italian study suggests. On the cosmetic front, omega-3 fatty acids in fish help keep skin-cell membranes strong and elastic.

Olive oil, tomatoes, and red wine also have antioxidants that help block the chemical reactions that lead to sun damage, explains Leslie Baumann, MD, chief executive officer of the Baumann Cosmetic and Research Institute in Miami Beach, Florida.

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Vegetarian/vegan

The New Becoming Vegetarian, Skinny Bitch

The lowdown: Whether you skip meat and other animal products for your health, ethical reasons, or both, you probably eat more fresh produce and whole grains as a result—good news for your skin. The antioxidants in these eats neutralize the free radicals that contribute to wrinkles, brown spots, and other signs of aging.

Veggie diets tend to be low in fat, so incorporate ground flaxseeds and olive and safflower oils to help your skin retain water, making it more supple, Dr. Baumann says.

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High-Protein, Lo...

South Beach Diet, Atkins

The lowdown: Cutting back on white bread, pasta, and refined sugar can also lower the stress hormone cortisol and minimize breakouts, says dermatologist Francesca Fusco, MD. Plans that swap in whole grains, fresh produce, and lean meats also up antioxidants, blemish-busting zinc, and collagen-building protein.

But beware of meat-heavy plans. "Too much animal fat can result in an increased production of free radicals, which are thought to interfere with normal cellular processing," says aesthetic dermatologist Lisa Airan, MD.

Drink lots of water to keep skin hydrated. Choose fish and other lean proteins, not just red meat. Eat antioxidant-rich leafy greens daily.

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Low-Fat

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Raw

Raw Food Life Force Energy

The lowdown: Raw-foodists—who nosh mainly on produce, nuts, and sprouted beans and grains—believe that not cooking food preserves its natural enzymes, aiding digestion, energy, and weight loss. Though these claims aren’t universally accepted by doctors, there’s no denying that these foods make for a happy complexion. What’s more, the healthy oils in nuts, avocados, and olive oil keep skin cell membranes strong and pliant. The downside: "When you eat very little meat, it’s challenging to get enough of the building blocks for collagen," Dr. Airan says.

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What About the C...

The cornerstone of Health’s signature plan is Resistant Starch (RS), a type of carbohydrate that acts like fiber, moving through the digestive tract without being fully digested, absorbed, or converted to glucose. Piling your plate with RS foods boosts metabolism and keeps you fuller longer, which helps you steer clear of skin-damaging foods, such as fat- and sugar-laden snacks, while lowering blood sugar and insulin levels.

The result: a happy body and clearer skin, Dr. Karcher says. CarbLovers also provides lots of skin-smoothing omega-3 fatty acids, antioxidant-packed whole grains, and collagen-building protein.

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Packed with a Pu... These superfruits are packed with antioxidants, fiber, vitamins and minerals, and other nutrients that can help you live longer, look better, and even prevent disease.