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It is a challenge and scientists are working hard to come out with a new form of gray hair treatment that would prevent gray hair and give a run to dyes. In fact, most agree there are some formidable hurdles yet ahead since the target is a complex one.About 85 to 90 percent of a person's some 110,000 hairs are actively growing while the remaining is dormant. Each strand grows for three to five years and then falls out after about four months. Each strand of hair is made of the protein keratin and grows out of a follicle in the scalp's skin that has cells filled with melanin. As a strand grows, these cells donate a little colour to the hair cells in the form of tiny granules of melanin. One form of melanin, called pheomelanin which creates blondes and redheads, while another, eumelanin gives brown or black colour to the hair. The problem starts around the age of 30 in men and a little later in women when these pigment cells gradually stop producing melanin and without the chemical, our hair turns white or gray.The surgeon uses a 1mm punch to make a small circular incision in the skin around the upper part of the follicular unit. It is then directly extracted from the scalp. Very often follicular unit extraction (FUE) and follicular unit transplantation (FUT) are treated as two different things. It's wrong. FUE is basically a type of FUT in which the follicular units are extracted directly from the scalp, instead of microscopically dissected from a strip that has already been removed. In follicular hair transplant the individual follicular units can be obtained either through single-strip harvesting and stereomicroscopic dissection or through FUE. Follicular transplant preservationIn follicular hair transplants it is crucial to keep the individual follicular unit as it is. Neither the unit should be broken up into smaller units nor combined with larger ones.This is a ground-breaking development in the history of cosmetic surgery. Often hair transplant surgeons combine several follicular units or split them up.