For DHT and hair issues, there's a doc in California who sells 15% minioxdil. The stuff works. He has been at it a long time, and the problem with that high a dose normally is getting it to liquify and stay that way - he has figured it out. It also has a couple of other things in it, to help it absorb, etc. The way to use the stuff is to put it on at night before you go to bed - just rub it in. He suggests that you use it with liquid Saw Palmetto. You can find liquid Saw Pal all over the net, and of course its totally legal. Really inhibits the DHT in your scalp, and I think probably helps some in other places. The doc knows what he is doing and says you really get more of the Saw Palmetto in your system topically like this, then from taking the pill supps. You have to pay $25 for an on-line "exam", but then you can order the high concentration minioxdil from him forever. Don't have his name or website right here, but just type "Minoxdil" in Google. He's American-Oriental and in California - an MD. Since I've been using his stuff, my bald spot on the back of my head has srunk to half of what it was, and my front hairline is coming back. And I'm a REALLY old guy, whose been on supps on and off for 20 plus years. I take finisteride low dose one a day each day also, and of course up it when I'm on. This is a safe and effective way to fight the hair loss, whether from "supps" or just general MPB.
BTW - you have to continue to use this stuff - if you stop, in a few months things will go back to where they were, hairwise - but its not particularly expensive, and has helped me keep a lot more hair.