Well, he is a lunatic for different reasons, but the reason for declining testosterone is not because of a crime, a plot, or correlating to a lack of masculinity, heavily masculine individuals still exist en masse, rather the average is being brought down by associated factors including average USA population increases in weight, diabetes, and of course age (See the Table below). Other factors that haven't necessarily been proven to effect us on this scale, but probably do, is the move away from meat. While strictly veganism and vegetarian demographics have declined in recent years depending on who you ask, meat-replacement markets have grown massively in the last two decades.
There is no current widespread deficiency or emergency. Even with lower Testosterone levels most males are sufficient to remain healthy, even the chart shows that all but one blip of the collected data is above the 350 mark which is considered safe.
EDIT: Looks like consumption of fat contents in meat inversely correlates with testosterone, so vegans might actually be more masculine by that definition.
A quick literary search suggests there is no evidence linking a vegan diet with a reduction in testosterone. In fact, most studies found an small but significant increase in testosterone with specifically vegan men.
A simple google search shows nothing that backs up your claim, odd that you would have made it.
Odd that you would concentrate on the one claim OP himself says is a weak link, especially when the influence of veganism would be so much less than age and obesity. Odd that you wouldnt look into the connection of age/obesity and T-levels.
Being a vegan, I like to stay abreast of the literature, and I'd never heard of a link between veganism and low T-levels. I quickly checked it, there's no link (in fact the opposite seems more likely), so it seemed like an unnecessary dig at veganism for no reason. I don't have a vested interest in any of the other claims OP made, so that's why I picked at that one. You don't have to fact check an entire comment to have an issue with one point.
I used words like "not proven to" and "probably" as reasons to express doubt, but yeah it looks like it was a recent controversy with men's health magazine and several studies going back about at least a decade disprove it citing a very clear inverse correlation with higher fat concentration in meats.
EDIT: Looks like consumption of fat contents in meat inversely correlates with testosterone, so vegans might actually be more masculine by that definition.
Could you please provide your source for that? I would like to read more on that.
To be clear the fat contents correlate with the lower testosterone, but the same was not true for high carbohydrate diets, so it's a correlation specifically with high fat meats.
