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ARTICLE |

The Biology of Hair Growth.

William B. Bean, M.D.
AMA Arch Intern Med. 1960;105(6):974-975. doi:10.1001/archinte.1960.00270180152021.
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ABSTRACT

Hair represents an expendable, transient substance, proliferated in the skin by a remarkable complicated cellular system. It has been studied extensively, particularly in fur-bearing or wool-producing mammals. Now, more attention is being given to hair in man. Whole industries have waxed and waned around the styles of hair dress, of wigs, of fashions in cutting hair or letting it grow long. Hair dying not only has added to what milady thinks is real beauty but has introduced a new array of possibly toxic and harmful agents, occasionally causing distressing, spectacular, and sometimes dangerous forms of sensitivity. This book approaches the biology of hair from many different directions. It ranges over embryology, anatomy, histochemistry (including electron microscopy), the details of mitotic activity in the hair follicle, the chemistry of keratinization, the problem of hair pigment, the skin, its vascularity and their relationship to hair growth, nutritional factors, hormonal factors, age,

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The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
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