Hair is something all people are born with. Some people have thick hair, some people don’t. Some people grow hair fast, but some do not. These all depends on a lot of things including genetics, how you take care of your hair, the food you eat, and more. Your hair can drastically change the way you look. It can make you look younger or older, and depending on the style, it can compliment the features you might be insecure about. But hair is not just for vanity, it serves a more important purpose than that. Hair found on the head is the primary source of heat insulation and cooling, and protects our scalp against ultra-violet radiation exposure.