I dont know wouldnt slower/less blood flow just mean less/slower androgens getting to the hair and causing male pattern baldness like normal? I mean androgens move through the blood stream I would imagine along with everything else so local DHT seems it would be influenced by systemic but maybe im wrong. So less blood flow just means lower local androgens both T and DHT which would help hair it seems so I dont know how you rule that out and say its something more elaborate although it certainly could be. I dont buy into the idea that blood flow nourishes hair or anything plenty of people eat total garbage and have like no hair loss which makes no sense if nutrition were some controlling factor IMO