Lentils are a great way to get zinc, biotin and iron-rich protein in your diet. Protein is an important key to healthy hair, as it helps strengthen the actual strands and aids in the speed of growth. Protein also works to prevent dry scalp, making it an especially important part of your diet in the colder months. These little beans aren’t just for vegetarians! Meat-lovers could also benefit from the extra vitamin boost lentils provide. Unsure of how to add lentils to your normal nosh routine? Try adding them to a veggie soup.