Testosterone not to blame for men's bad behavior?

December 8, 2009 Instead, the sex hormone may actually encourage fair play, according to a study in the journal Nature.

Participants took either a testosterone pill or a placebo pill. They were then given money and the opportunity to negotiate fair or unfair offers to a partner.

Those taking testosterone generally made the fairest offers and were more sensitive about their dealings.

Researchers suspect it's the myth about testosterone that actually encourages bad behavior and not the actual effect of the hormone.

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