Testosterone replacement is an issue that concerns most men over the age of 35 or 40. Although these men may feel great, they know, deep down, that they feel differently than when they were in their twenties. Granted, a lot of it has to do with general wear and tear and a host of age-related declines, but some of it has to do with the steady decline in testosterone production.

He's baaack! The one. The only. The original "Steroid Guru," Dan Duchaine is, once again, on the loose and talking to Testosterone.