What I've been learning about testosterone in the literature (I'm very much not done learning) 1/n
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Modern-day hunter-gatherers, such as the Ache, have much *lower* T than men in developed countries. https://link.springer.com/article/10.1007/BF02692109 … … The authors think it's probably a result of parasites & infectious disease. (8/n)
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Baboons exposed to a stressor (injections) have sharply differing testosterone responses. Dominant males experience a spike in testosterone, while subordinate males experience a drop. https://www.sciencedirect.com/science/article/pii/0018506X82900277 … (9/n)
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Sleep deprivation reliably causes a large (temporary) drop in testosterone, e.g. https://www.sciencedirect.com/science/article/pii/S0301051112002037 … (10/n)
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Does *repeated* performance of activities that temporarily raise/lower T levels result in *chronically* higher/lower T or changes in fertility? I don't know yet. (11/n)
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I couldn't find any population studies examining secular trends in cortisol levels, or population-level correlations between cortisol & testosterone levels. (12/n)
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I also couldn't find any studies examining the association between testosterone and occupation (do men with physical labor jobs have higher testosterone than men with sedentary jobs?) (13/n)
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End of conversation
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But can we tell if it was from being captives or from being released?
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no, unfortunately. Can't very well tell the Iranian government to please run blood tests on hostages and share the data with us!
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