Hair loss treatment: Four ingredients to help hair regrowth - and where to find them Chanel Georgina Replay Video UP NEXT The American Academy of Dermatology Association (AAD) noted that being low on biotin, iron, protein, or zinc may be contributing to hair loss. Which foods are rich in these ingredients? "If you're not getting enough of one or more of these, you can have noticeable hair loss," said the AAD. "When your body gets enough of the missing nutrients, hair can regrow." Biotin The National Institutes of Health (NIH) identified the foods that contain the most biotin,...