Testosterone versus HGH . Some patents have questions about the differences between testosterone and hgh or if both types of hormone shots can be used at the same time: "HGH vs Testosterone", "Can I use HGH with Testosterone?" Some of the main health benefits of taking both testosterone and growth hormone is building strong muscle, burning body fat, boosting libido and sex drive, better sleep, improved skin, memory, mood and vision. One of the most significant health benefits besides increased muscle mass is increased energy, stamina and stronger bones allowing both men and women to better exercise and recover from workouts. Regarding sexual health, testosterone and HGH increase sexual desire in men and women, prolong and help strenthen erectile function in men, and provide enhanced sensation in women.
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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.