Testosterone deficiency is a common problem in men, but now we know that insufficient estrogen can cause problems too. Actually, if you are given supplemental testosterone, some of it might be converted to estrogen, which can be a good thing. Recent protocols actually block that conversion, which is not so good. Your doctor can guide you through hormone imbalance, especially if he or she uses bio-identical hormones.
Dr. Peter Snyder at University of Pennsylvania Medical school for more info.
Celebration of Health Association website