The right nutrients and vitamins are essential for healthy, beautiful hair. Deficiency in nutrients can lead to slow hair growth and actual hair loss. In order to thrive, hair needs protein, iron, zinc, vitamin C and biotin. Our hair is actually made out of protein and something as simple as a lack of protein can seriously impact the appearance and health of your hair. Here is a list from Shop Hair Dryers of the best 7 foods to eat for healthier hair.