If you don’t consume enough protein, your hair follicles may not get the nutrients they need to regenerate. Try eating more lean meats, nuts and eggs for a boost of protein. If you’re vegetarian or vegan, protein can be hard to come by—but there are plant sources that pack a punch, like kale, soybeans and spinach.
Copper is critical for healthy hair, as it helps to produce tyrosinase, an enzyme that breaks down melanin—the protein in your hair that gives it its color. Copper deficiency has been linked to thinning hair, so be sure to get enough of it in your diet. Good sources include beef liver and pumpkin seeds. In addition, you can take a copper supplement if necessary.