If you decide to buy Sustanon for the purpose of performance enhancement, in many cases, especially if you live in the . youll be doing so on the black market, and this compound comes with a cost with such a purchase. First and foremost, this is one of if not the most expensive testosterone compounds youll ever find; this is largely due to is extreme popularity. Further, this is without question the most commonly counterfeited testosterone compound youll ever find. In most cases, when counterfeited its still testosterone, but its normally a single large ester testosterone compound and not the precise four ester mixture as described above. For these reasons, if you decide to buy Sustanon 250 , youll need to put in a little extra effort if youre going to find a good price, and more importantly, if youre going to find a quality product. Make no mistake, theres plenty of high quality product at a reasonable and fair rate, but you may need to do a little digging.
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.