If you have manboobs it is most likely your testosterone levels have dropped and low testosterone levels are one main cause of manboobs. The normal levels of testosterone are around 350-1000 nanograms per deciliter (ng/dl). When you reach forty, these levels begin to decline. However when you have health problems like brittle bones are heavily overweight or obesity, these levels might begin to decline much easier.

In a clinical study of 274 hypogonodal men, 82% of males who used…