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Androgenetic Alopecia.
In men, androgenetic alopecia can run the gambit from spot hair loss to total baldness. In women, diffused thinning appears over the top or sides of the scalp. Basically, androgenetic alopecia is caused by inherited hormonal fluctuations that are believed to primary result in high DHT toxicity. Most male and female patterned baldness is associated with androgenetic alopecia.
DHT's impact on the hair follicle: A threat to healthy hair growth is DHT (dihydrotestosterone). Over time, the hair follicle naturally produces an enzyme named 5-Alpha Reductase. It is this enzyme or complex of enzymes that reacts with testosterone to create DHT (a toxin that is very difficult to remove from the scalp skin). Testosterone, naturally present in the hair follicle, converts to DHT and has been found to be a contributing cause of hair loss.
(reprinted with acknowledgment from "An Educated look at the causes of Hair Loss" coutesy Nioxin Research Laboratories Inc.)
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