Unraveling the Enigma of Hair Growth: Discoveries and Insights Await
Hair is a natural covering that grows from the skin of mammals. It is composed of a protein called keratin, the same protein that makes up nails and skin. Human hair is typically straight, curly, or wavy, and can vary in color from black to brown to blonde to red. Head hair, in particular, serves several important functions. One of the primary functions of head hair is to protect the scalp from the sun's harmful ultraviolet (UV) rays. UV rays can damage the skin, causing sunburn, premature aging, and even skin cancer. Hair helps to block these rays from reaching the scalp and can reduce the risk of these conditions.