US dollars mefenamic acid forte and pregnancy Since hair and nails are made of protein, people who don't get enough in their diet may experience brittle nails or hair loss, says Wu. Typically, this only occurs in people with severe diet limitations or eating disorders, she says.Vegetarians should keep in mind that protein doesn't have to come from meat -- beans, tofu, spinach, lentils and more are all beneficial. Foods with a particular amino acid that creates keratin, called cystine, can also help, like pork, broccoli, wheat germ and red peppers, says Wu.
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