Spoken from someone who probably has a head of hair like a 12 year old latin boy!!
I read on seveal boards if you want to block DHT locally (safer than Propecia) you can use Nizoral shampoo - just let it sit on your scalp for 10-15 minutes. The 2% is the good stuff.
Ripped this post from another site a while back and I am trying this now. Seems to be working but it could all be in my head (pun intended):
Hair loss prevention?
Ok:
-Order the Nizoral shampoo, 100mg tabs of spironolactone, and Azelaic Acid cream
-empty 50ml of the shampoo (one bottle) into a bowl, and microwave for 20 secs
-crush 1gram of the spironolactone tabs (1 package of the 100mg tabs) into a FINE powder, and mix into the warm shampoo.
-Microwave again for 20 secs
-add in 1 tube of the azelaic acid cream and stir
-microwave for 15 secs
-add in 50 more ml of shampoo
-wait a moment, then microwave again for another 15 seconds
-Stir
Use this in the shower EOD. Wash with regular shampoo first, then put the mixture on for about 5 minutes and rinse. Do not get in your eyes, as the spironolactone is a STRONG Anti-Androgen.
This is a topical solution to blocking DHT and DHT related AAS from the hair follicle, in addition to regrowing new hair