The 5 Best Foods to Eat for Stronger Nails and Healthier Hair

— -- intro: Looking good is just as much about taking care of your body on the inside as it is about using products on the outside. And we're not just talking about your skin:

"A nutritious diet promotes healthy nails and hair, too," says Joshua Zeichner, MD, director of cosmetic and clinical research in the department of dermatology at Mount Sinai Hospital in New York City.

But there's no need to add a refrigerator's worth of new foods to your diet. "Since both hair and nails are made of keratin, through a similar process in the body, it's thought that nutrients that help one can also help the other," says Dr. Zeichner. Ready to say bye-bye to brittleness? Read on for foods that give your hair and nails a boost.

quicklist:1category: The 5 Best Foods to Eat for Stronger Nails and Healthier Hairtitle: Whey proteinurl:text: "Your hair needs protein to produce keratin, the proteins that make hair strong," says Dr. Zeichner.

"If hair doesn't receive enough protein, it can go into a 'resting phase,' causing noticeable hair loss," adds Beth Warren, author of Living a Real Life with Real Food.

Try adding a scoop of whey protein to your morning smoothie for simple boost. (Bonus: Whey protein may help control your appetite. In one study, people who drank whey protein ate 18% less two hours later than those who drank a carb-heavy beverage.)

quicklist:1category: The 5 Best Foods to Eat for Stronger Nails and Healthier Hairtitle: Red meaturl:text: A juicy steak is loaded with protein, and it also has another nutrient that's important for hair and nail health: iron.

"People with iron-deficiency anemia often have thin hair," says Dr. Zeichner.

And according the American Family Physician, iron-deficiency is associated with koilonychia—a nail disease characterized by spoon-shaped nails. That doesn't mean you should eat red meat every day of the week. Red meat is high in saturated fat, and eating a lot of it has been associated with an increased risk of several health problems including heart disease, several types of cancer, and type 2 diabetes. But you can safely indulge in a lean cut of beef once a week. If you think you may be deficient in iron, talk to your doctor about starting a supplement.

quicklist:1category: The 5 Best Foods to Eat for Stronger Nails and Healthier Hairtitle: Blueberriesurl:text: “Antioxidants help protect your body's cells against free radical damage," says Erin Palinski, RD, author of Belly Fat Diet For Dummies. "This damage increases stress hormones and inflammation, which impacts all cells in the body, including those in the hair and nails."

Among other fruits and dark greens, Palinski calls out blueberries: "They have one of the highest antioxidant properties of all fruits," she says.

quicklist:1category: The 5 Best Foods to Eat for Stronger Nails and Healthier Hairtitle: Almondsurl:text: Not only are almonds a good source of protein, they're loaded with magnesium, which helps maintain healthy hair and nails.

"Magnesium is Mother Nature's anti-stress mineral, and stress is a major factor in hair loss," explains Ashley Koff, RD. "Vertical ridges in your nails may be a sign of inadequate magnesium," adds Palinski. You can also get more magnesium through leafy greens, cacao nibs, and soybeans.

quicklist:1category: The 5 Best Foods to Eat for Stronger Nails and Healthier Hairtitle: Beerurl:text: Beer is one of the richest sources of silicon in the average diet, says research from the Journal of the Science of Food and Agriculture.

"Silicon is a trace mineral thought to increase circulation to the scalp, which is good news for hair growth," says Rebecca Kazin, MD, dermatologist at the Washington Institute of Dermatologic Laser Surgery and the Johns Hopkins Department of Dermatology.

That explains why a daily 10-milligram silicon supplement was shown to reduce hair and nail brittleness after 20 weeks, according to the Archives of Dermatological Research. No need to go overboard, though: Most single servings of beer contain more than 10 milligrams of silicon. Experts recommend that having no more than one drink a day if you're a woman, and two if you're a man.

This article originally appeared on Health.com.