First of all, like anything, your hair needs nutrients to grow. Neymar doesn’t rely on junk food to grow his latest hairstyle, so neither should you. Protein is key to a balanced diet, so hit the butcher and breakout the grill, or get fancy with oysters and sashimi–whatever it takes to get your amino acids. Nuts, eggs, yogurt, and other dairy products are rock stars in the protein department as well. While caveman diets may be all the rage in some parts of the world, you definitely need to continue to eat your whole grains, fruits and veggies, which also contain vital nutrients. If eating your vitamins is less your thing, maybe pickup some supplements such as: folic acid, fish oil, flaxseed oil, and biotin.