In some ways, hormone replacement in men is more important than it is for women. The most important hormone to replace in men is testosterone. It usually peaks around the age of 20, and then starts to decline yearly. Around the ages of 50 to 60 it has often decreased to a level where symptoms become noticeable. The classic changes that occur most often relate to a decrease in libido (loss of interest in sex) and erectile dysfunction. However, there are other aspects to testosterone replacement that men should be aware of. For example, almost 100% of men that have...