The testosterone connection

Article Abstract:

Testosterone that is exposed to the enzyme 5-alpha-reductase produces dihydrotestosterone, which causes male pattern baldness. Thinning hair is a normal part of the aging process, which also causes each strand to become finer and weaker.

Baldness, Alopecia

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Gray hairs: facts & fiction

Article Abstract:

It is not true that hair can go gray overnight or that graying can be caused by stress. Premature graying is not a sign of aging. Both heredity and diseases influence changes in hair pigmentation.

Causes of, Gray hair

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How erections work ... or don't

Article Abstract:

Erections are controlled by an increase in blood pressure in the penis when a sphincter muscle around its main artery dilates. Testosterone level influences the action of the sphincter.

Penis

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