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We should not confuse a "fine hair" with alopecia as there are many people who have always had fine hair or looks weak. This does not necessarily mean alopecia. In androgenetic alopecia, responsible for hair loss are the enzyme 5-alpha-reductase and the hormone testosterone. The enzyme converts testosterone into dihydrotestosterone (DHT) who is responsible for reducing finally the hair causing scalp membranes from becoming stiff. Thus, the follicular structure receives less blood flow and new hairs are weaker and fine normal. At the end of the process, the follicles atrophy and hair that falls out is not replaced by new hair. Were studied DHT levels in people with androgenetic alopecia usually normal? Therefore, science has determined that there is a high level of DHT which causes hair loss but a particular sensitivity of follicles against DHT. What causes excessive hair loss? A number of things can cause the fall Excessive hair.

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