Banana contributes to hair growth and repair in several different ways.
The main substance in banana that makes it an effective hair growth and repair agent is silica, also known as silicon dioxide. Silica is a natural quartz, and while it can be dangerous in high quantities, the amounts in which it is found in foods like banana has a strengthening effect on connective tissues in the human body. This includes bones and tendons as well as hair and skin.
Because silica is converted into collagen once it is absorbed by the body, the substance has been linked to stronger and faster-growing hair. The reason for this is that collagen is one of the most important proteins for hair care. It improves the elasticity of individual hair strands to minimize breakage.
Banana is a fruit high in antioxidants, which is also highly beneficial for hair growth. Not only will antioxidants help to soothe your scalp and prevent a buildup of dandruff. These same antioxidants will build up a protective layer to minimize oxidation.
The most common way to apply banana to your hair for growth and repair is by way of a hair mask.