Building muscles

There are some people who try their best in order to loos weight or build muscle, but they could not see the result of their effort. I have a friend who constantly goes to the gym, he pumps his arms, he walks in the treadmill and uses many supplements just to lose weight, but nothing works he is still a heavy weight. The bad thing is that he never he never got a bulging muscle in his arms. He then went to a physician to test what is the cause of his heavy weight. The doctor then test him and found out that he had low level of testosterone. That makes him flabby and soft unlike other guys. Luckily there are available medication for this just like the natural testosterone. The doctor recommends this to hm in order for him to utilize the excess sugar in his body since testosterone can help in metabolizing sugar which can lead to muscle building. Right now my friend is happy because he continuously loose excess weight, he is also building up muscle and some facial hairs since he never saw that in his body before.