The secular decline in testosterone. It's happening, and fast.pic.twitter.com/NMFfwjvhUz
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Candidate for cause of decline in T: US dietary guidelines encouraging empty carbs, discouraging meat, causing widespread zinc deficiency.
Important to remember that young men in poor countries have much lower T than we do; http://humrep.oxfordjournals.org/content/17/12/3251/T1.expansion.html …
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Declining T bad, but doesn't explain millennials. The guys working at the Apple store probably have more T than Roman legionaries
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