What determines who is a responder and who is not? Is it the amount of sulfotransferases in the scalp or something else? I always assumed those who don’t respond to the topical version will respond to the oral because the liver has more of these enzymes which will convert the minoxidil to minoxidil sulfate.
There are tests that can tell you if you will respond to topical minoxidil. These are expensive tests. If taken orally, the response is much, much higher.
