Testosterone levels have declined in adolescent and young adult males over the last two decades. https://www.sciencedirect.com/science/article/pii/S1743609519315292 …pic.twitter.com/9AFyMaQlpq
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For changes this large, it is unlikely to be any of those. It is probably increased obesity: "Obesity lowers testosterone levels.... a 2007 study of 1,667 men found that each one-point increase in BMI was associated with a 2% decrease in testosterone."https://www.health.harvard.edu/mens-health/obesity-unhealthy-and-unmanly …
The study found BMI to be unrelated to the decline in T. Also social context often has large effects on testosterone.
Modified feed probably.
Ok, thanks for responding, thats very interesting
The first is debated in the anatomy and physiology texts. We need more information.
Or it could be all of those factors men's lifestyle has changed dramatically in the past few decades.
Nutricional changes I guess.
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