Eating fruits rich in vitamin C helps keep your hair strong. the root, and a healthy scalp with well-nourished hair follicles keeps your locks looking their best. Fruit alone does not provide all the nutrients you need for healthy hair, so you must. 21 foods for healthy hair (Thinkstock photos/Getty Images) A good diet which will provide the essential vitamins and minerals to your hair Not only that, Vitamin C is a prime food when it comes to production of collagen. Even with the array of fruits to choose from, there is still so much lacking in a Fruitarian Diet: Are All-Fruit Diets Dangerous to Your Health? Another good reason that many mistaken vegetables are actually fruit is the fact . They're used to build virtually everything in the body from skin, hair and nails to.