Feed your hair The secret to think, strong, shiny strands isn't an expensive shampoo or fancy salon treatment-it's all about your diet. Eating a variety of healthy foods will give you the mane you've always dreamed of. Fill up on these nutrients to begin growing your healthiest hair ever. Several studies have found that vitamin D may help activate hair growth. However, D is a tricky vitamin. Few foods contain it naturally, and although sitting in the sun for a few minutes a day can help your

body produce more of it, many experts advise against it due to the increased exposure to harmful UV rays. Your best bet? Take a 1,000 IU supplement daily, and try these recipes that contain vitamin D. Protein is one of the building blocks of life, promoting cell growth and repair-and it boosts your hair strength, too! Women should get at least 46 grams a day (3 ounces of chicken has about 23). Follow this guide to determine exactly how much protein you should be consuming daily.