Legumes

Legumes (aka beans and lentils) are saturated with hair-improving vitamins and minerals like zinc, iron, and, most importantly, biotin. "Biotin strengthens the structure of keratin, which makes up the hair, skin, and nails," notes St. Surin-Lord. "It makes hair stronger, more resistant to breakage, and thicker in appearance." Legumes are a great source of protein—especially if you`re vegetarian or vegan.