People grow bald because follicles from which hair grows die or become stunted. A dead follicle can never be revived. A stunted one may be. Rarely does a scalp get so fouled with germs or fungus that follicles die and hair falls out. Despite hair tonic advertisements, dandruff, per se, does not cause baldness.
Hormones of the endocrine glands control the growth of hair. The adrenals stimulate growth. Precisely what hormone causes baldness is unknown. But in man the male sex hormone is definitely the ringleader. Wiry, energetic men are apt to be...
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