Vitamins promote hair growth

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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 cuticle is responsible for much of the mechanical strength of the hair fibre. It consists of scale-shaped layers. Human hair typically has 6-8 layers of cuticle. Wool has only one, and other animal hair may have many more layers. Hair responds to its environment, and to its mechanical and chemical history. For example, hair which is wetted, styled and then dried, acquires a temporary 'set', which can hold it in style. This style is lost when the hair gets wet again. For more permanent styling, chemical treatments (perms) break and re-form the disulphide links within the hair structure.

Hair serves a number of different functions. It provides insulation from cold weather and, in some species, from particularly hot weather. Because hair is often pigmented, it provides coloration. This might serve to camouflage an individual; in some mammals, the pigmentation changes with the seasons, becoming white during the snowy winter, for example.

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    by Susan L. Narod. Hair growth products overview, causes of hair loss, hair transplant surgery.
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    About the Clinic, services and procedures and contact information. Includes information on hair growth type products. Located in Knoxville.
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    Natural hair regrowth systems for men and women.
  • Lucia
    Manufactures hair, eyebrow and eyelashes growth products made of natural Japanese ingredients. Based in Nagoya. Site in English, Japanese, and Korean.
  • Renu Herbs
    Specializing in detoxification and colon cleansing, natural weight loss, hair growth, and other formulas for better health.