Men already have sufficient estrogen naturally, but many aging men develop excess estrogen. In fact, many aging men have more estrogen than their postmenopausal wives.
If you want to see the effect of excess estrogen and insufficient testosterone in men, just look at the average post-middle-aged man.
Increased incidence of cancer has been mentioned.
Estrogen supplementation in men will cause shutdown of testosterone production (via negative feedback). Low testosterone has been linked with insulin resistance, obesity, heart disease, and increased mortality in men.
Loss of libido.
Impotence is indeed a side effect in men.
Estrogen is pro-inflammatory (whereas testosterone is anti-inflammatory). Chronic inflammation is linked with all kinds of morbidity.
Estrogen lowers pain thresholds whereas testosterone tends to raise it. Women are indeed more susceptible than men to chronic pain conditions such as fibromyalgia.
Excess estrogen in men tends to cause water retention, high blood pressure and cardiovascular disease.
Estrogen causes fat accumulation. Women indeed have higher body fat than men.
Excess estrogen has been linked to prostate hyperplasia and prostate cancer in men.
Excess estrogen in men tends to cause depression and anxiety disorders. Indeed, women are more susceptible to these disorders than men.
Edited by viveutvivas, 27 December 2010 - 04:03 PM.