Testosterone therapy for body hair growth
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Among humans, nature selected for little body hair as part of a set of adaptations including bipedal locomotion and an upright posture. Bipedal locomotion is extremely inefficient, and many animals can outrun human beings for short periods of time; such animals, however, are inefficient radiators of heat, and cannot run for long periods of time. Thus, human hunters must be able to chase animals for long periods of time, and must therefore have an efficient mechanism for radiating body heat. Upright posture, which exposes less surface area of the body to direct solar radiation, and subcutaneous sweat glands, which operate best with an absence of hair.
The diameter of a human hair ranges from about 18 µm to 180 µm. In people of European descent, blond hair and black hair are at the thinner end of the scale, while red hair is the thickest. The hair of people of African descent is typically thicker than the hair of other groups.
The speed of growth is roughly 10 cm/yr = 0.3 mm/day = 3 nm/s. The cells at the base of the hair follicle divide and grow extremely rapidly. This is why people under chemotherapy sometimes lose their hair; the treatment targets any rapidly-dividing cell, not just the cancerous ones.
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- Hairobics All Natural
All natural herbal solutions for ethnic hair growth, hair loss,and thinning hair. - Norris Hair Transplant Clinic
About the Clinic, services and procedures and contact information. Includes information on hair growth type products. Located in Knoxville. - Rogaine.com
Questions and answers about minoxidil hair growth solution. Pharmacia and Upjohn the manufacturers of Rogaine own this web site. - Vaniqa
Features, eflornithine hydrochloride, a prescription cream that slows the growth of woman's unwanted facial hair. - Physicians Hair Growth
Hair loss treatment center that supplies ReMox, a combination of minoxidil and tretinoin.