Protein

Your body uses protein to repair and build tissue cells, including hair. It uses keratin, a protein found in 80 to 85 percent of your hair.

Zinc

The mineral zinc plays an essential role in hair growth and maintenance. It is involved in numerous cellular reproductive activities, including cell division, wound healing, protein synthesis, and DNA synthesis. Hair growth depends on the proper functioning of these processes,

Vitamin A

The body requires certain vitamins and nutrients in order to grow healthy hair. Vitamin A is among these nutrients. This group of fat-soluble vitamins supports the immune system and vision, among other functions.

Iron

The human body needs iron for healthy hair. This nutrient is essential for healthy cell and organ functions and a deficiency in iron can lead to a variety of health problems including brittle hair. Unlike other nutrients, iron is essential for hair growth, so it is essential to get enough of it each day.