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Why do we have hair The simple answer is protection. I've heard dermatologists argue about whether the scalp hair we modern humans have is enough to protect us from the elements. I have proof that it is: My bald grandfather's head gets cold when the temperature drops below 50掳 F (10掳 C), and his scalp and neck are covered with skin-cancer scars.What hair's made ofYou may have no interest whatsoever in knowing what the strands of your hair are made of, or how they grow. But the answers are interesting - and important, too. Once you understand how hair is built and how it functions, you'll find it easier to care for, be better able to pinpoint bogus hair-care claims, and know enough about how your locks behave to stop worrying about them and let them do what nature intended.The only areas of the human body without hair follicles are the lips, the palms of the hands, and the soles of the feet.Hair is an appendage of the skin. Each individual strand grows from a single live follicle that is anchored in the subcutaneous layer of your skin. A sebaceous gland that produces sebum is attached to each follicle.The problem of hair loss presents the various issues not only in terms of the looks but the effect on an individual's self-esteem as well. The problem of hair loss is not a new problem for sure, but where the issue of baldness in the past was considered a natural part of the aging process, today the men and women very well associate baldness with "growing old."