If you are suffering from depression, irritability, fatigue, low sex drive, thinning or wrinkling of the skin, loss of body or facial hair, belly bulge and several other health issues, then perhaps you are experiencing a drop in testosterone level in your body. Testosterone is the primary male sex hormone as well as an anabolic steroid which plays a very crucial role in human body. If the body is suffering from low testosterone levels it can cause to the development of more severe ailments as it disturbs the blood sugar metabolism of the body, which eventually leads to obesity and diabetes.