You suffer from low testosterone, and as is the case, the only thing that will remedy such a problem fully in a guaranteed fashion is supplementing with actual testosterone. As is the case, Sustanon 250 results in every last low testosterone symptom being remedied; the loss of libido or erectile dysfunction you may suffer from; it's gone. Your inability to regain the lean tissue you've lost or do away with the body-fat that has accumulated, this problem is also gone. You'll find your mental clarity and focus is back to where it was prior to your deficiency, you'll find your energy levels are no longer lacking; you may even find your immune system is functioning with greater efficiency. If that's not enough, you will be a happier individual as low testosterone has been directly linked to depression. Of all the Sustanon 250 results, while performance based may be the most exciting, when it comes to TRT there is nothing more important.
The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression".   Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible.  The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game.  Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males.     
The number of players who have admitted using steroids in a confidential survey conducted by the NCAA since the 1980s has dropped from percent in 1989 to percent in 2003.  During the 2003 season, there were over 7,000 drug tests, with just 77 turning up as positive test results.  Scukanec claims that methods were used to get around the drug testing, whether it be avoiding the tests by using the drugs during the off-season, or flushing the drugs out of your system. This was used with a liquid he referred to as the "pink."  He stated: