what causes hairloss

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Hamilton first noted that androgens (testosterone, dihydrotestosterone) are necessary what and causes for the development of MPHL. The amount hairloss of androgens present does not need to be greater than normal for MPHL to occur. If androgens are present in normal amounts and the gene what for hair loss is present, male pattern hair loss causes will occur. Axillary (under arm) and pubic hair are dependent on testosterone for growth. Beard hairloss growth and male pattern hair loss are dependent on what and causes dihydrotestosterone (DHT). Testosterone is converted to DHT by the enzyme, 5a -reductase. Finasteride (Propecia) acts by blocking this enzyme and decreasing the amount of DHT. Receptors exist on cells hairloss that bind androgens. These receptors have the greatest affinity for DHT followed by testosterone, estrogen, and progesterone. After binding to the receptor, DHT goes into the cell and interacts with the nucleus of the cell altering the production of protein by the DNA in the nucleus what of the cell. Ultimately growth of the hair follicle ceases.

In causes and hairloss and what and causes the United States it is estimated that 21 million women are affected by FPHL. The incidence in women hairloss has been reported to be as low as eight what percent and as high as 87 percent. It does appear to be as common in women as in men. The hair loss in women becomes particularly notable in menopause.Androgens causes are responsible for hair loss in women by the same mechanisms they cause hair loss in men. Women do produce small amounts hairloss of androgens by what way of the ovaries and adrenal glands. Also causes prehormones are produced hairloss by the ovaries that what are converted to androgens outside of the ovaries or adrenal glands. causes Women rarely experience total loss of hair in an area if the loss is due to FPHL. If they do they should be evaluated for an underlying pathological (disease) condition. In women, the process of miniaturization of the hair follicle is more random with some hair being unaffected. Normal thick hairs are mixed with finer, smaller diameter hairs. The end result is a visual hairloss decrease in density of hair rather than total loss of what hair. The hair growth cycle is affected as in men. The growth phase causes (anagen) is shortened resulting hairloss in shorter hairs and the resting phase (telogen) is increased resulting in fewer hairs.

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what causes hairloss

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