Whole Grain

Whole grains contain biotin, iron, zinc, and vitamin B. Biotin is an essential part of amino acids that are building blocks of the body. Hence, biotin promotes hair growth and makes them healthy and thick. You can also incorporate fortified whole grains into your diet as they are a rich source of iron. Maintaining optimal levels of iron in the body improves circulation in hair follicles and helps to attain healthy and thick hair.