Scalp muscle contractions may reduce DHT levels by reducing blood flow to the scalp, thereby favoring testosterone conversion to estradiol over DHT.

“so the crazy thing about this is that i'm explaining all of this and you actually might be able to reduce dht through these mechanisms so this is totally hypothetical this is totally you know mechanistic and there's no studies to support this but technically speaking dht is a conversion from testosterone that does not require oxygen whatsoever and when free testosterone has an opportunity to do something it can either convert into estradiol and estrogen and that conversion is oxygen dependent and estrogen is very pro hair or it can convert to dht through the 5-alpha reductase enzyme”