5. Sweet Potatoes
Sweet potatoes make the list because of their beta-carotene. This compound is converted by the body into vitamin A, which we know helps in the production of sebum. Sebum is critical to scalp health and by extension, helps keep hair moisturized.
Vitamin A may also increase the rate of hair growth and encourage thicker strands, as well as prevent other hair follicles from regressing. You can get more than 4x your RDA of beta carotene in one medium sweet potato.