I'm deeply confused by the worldwide drop in testosterone levels & sperm counts. It's a *huge* effect, too big to be explained by obesity. The most common explanation I see proposed is environmental contaminants. But I don't know if that's true, or which contaminants matter most.
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one angle to look at for this is urban vs rural T levels (urbanization could be dramatic enough to explain)- unfortunately it seems understudied, but there's a small study in South Africa showing no effect on men:https://www.nature.com/articles/1001493 …
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another small one showing no urban/rural diff: https://www.sciencedirect.com/science/article/pii/S0045653512012994 …
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Also bad sleeping habits, which at this point ia worldwide phenomenon, have a huge affect on testosterone production
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Someone gave a like to this tweet just now while having insomnia
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data lags behind intuition sometimes but word
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what about increase in sedentary lifestyle?
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it is a social adaptation of the society when the high death rate is excluded. Evolutionary mechanism.
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Possibly.
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Trust your instinct. It's often more correct than the numbers.
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“Science is what we have learned about how to keep from fooling ourselves.”
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