Testosterone is significantly correlated with aggression and competitive behaviour and is directly facilitated by the latter. There are two theories on the role of testosterone in aggression and competition.  The first one is the challenge hypothesis which states that testosterone would increase during puberty thus facilitating reproductive and competitive behaviour which would include aggression.  Thus it is the challenge of competition among males of the species that facilitates aggression and violence.  Studies conducted have found direct correlation between testosterone and dominance especially among the most violent criminals in prison who had the highest testosterone levels.  The same research also found fathers (those outside competitive environments) had the lowest testosterone levels compared to other males. 
Crazy Bulk steroids are known to be the best legal alternative steroids and are therefore considered to be safer than the real one. This is one of the most popular reasons why many are switching on legal steroids these days. This is also known to be as effective as real steroids and many users even claim that it is better. This starts by helping you burn excess fats first as these are hindrances to having a better body. Once the fats are eliminated, you can see that your body would immediately look leaner. These steroid alternatives also help in the gain of more muscle mass and making them stronger too. However, you have to note that this is only as effective as your lifestyle and routine. This will not give you maximum changes if no proper diet and exercise is established. One of the best things about Crazy Bulk legal steroids is that there are no side effects at all and there are no controlled substances too.