The majority of men who find themselves losing their hair do so because of male pattern baldness.  This condition causes a loss of hair that generally starts at the front of the scalp and the crown.  As time goes on the hair loss expands from the front to the back resulting in a complete loss of hair on the upper half of the head.  This condition has been known of for years but it is only recently that the hair regrowth medical community has really determined the cause.

Male pattern baldness is caused by a build up of DHT (a metabolite of testosterone) on the roots of the hair.  This build up inhibits the transfer of nutrition and oxygen to the hair follicle thus causing it to stop producing hair.  Revivogen was developed by a MD with a dermatological board certification as a substance to combat the build up of DHT.  If you have hair loss you owe it to yourself to check it out.