halo. so what is the corelation between reduced blood flow, lets say due to stress, and androgen receptors and PGs? lets say you restrict the blood flow to the scalp of a woman, and her hair starts to shrink and eventually falls, does it still have any connection with DHT?

Well if you have truly, severely reduced blood flow the tissue won't get enough nourishment anymore and it starts to die. That's not only the case with hair of course. No it's not related to DHT. But in general the "blood flow" theories are not correct. It only affects your hair in extreme cases.

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