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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. [78] 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. [78] Thus it is the challenge of competition among males of the species that facilitates aggression and violence. [78] Studies conducted have found direct correlation between testosterone and dominance especially among the most violent criminals in prison who had the highest testosterone levels. [78] The same research also found fathers (those outside competitive environments) had the lowest testosterone levels compared to other males. [78]

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What testosterone pills do

what testosterone pills do

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