We are born with the total number of hair follicles that we will ever have in our lives. Our body has around 5 million follicles, whereas our scalp has around 100,000 follicles. People with oval follicles have curly hair, whereas those with round follicles have straight hair. Some follicles cease generating hair as we age, resulting in baldness or hair thinning.
According to the American Academy of Dermatology, hair grows roughly 1/2 inch every month on average. That works up to roughly 6 inches every year for your hair on your head.
Keratin and dead skin cells make up hair. Science has learned a little bit about how hair development is controlled at the molecular level in the body, but not enough to know how to directly accelerate hair growth. While there is no immediate way to help your hair grow quicker, there are things you can do to keep your hair healthy and long.