According to research in 2007, traders are more successful when they are high on their own hormones, including adrenalin, cortisol and testosterone.

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Certain metabolic and kidney diseases, including diabetes, are known to cause abnormally low testosterone, Shabsigh says, adding the prevalence of those disorders rises with age.

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He also said officers had failed to properly investigate and catalog evidence found there, including ammunition and a bottle of what Botha first called testosterone before backtracking.

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Now in his TV interview with Oprah Winfrey he seems intent on spinning a new backstory, including the idea that he took performance-enhancing hormones like testosterone because his testicular cancer required him to.

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That may sound surprising, but high levels of testosterone in the womb have been linked to several other brain-related phenomena, including left-handedness, dyslexia and female homosexuality.

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Therefore, the Phase III LibiGel (testosterone gel) safety study will continue as per the FDA-agreed protocol, without modifications including continued enrollment of new subjects.

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