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In addition to this function of testosterone supplements, expect that you will also have better endurance, leaner muscles, improved sexual performance and vigor. This will surely add vitality to your life as you want to, right where you want it. To be able to get all these benefits, better check on each facet of the supplement you want to order. You have to be certain you get ultimate results. Even if results may vary from one person to another, you can be assured that you will be able to see outcomes accordingly as long as the product is efficient enough.
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.