I have no authoritative knowledge here, but the typical answer is they eat mostly fermented soy. I personally have no idea if that actually matters, but that's the answer I've heard.

Asian cultures are aware.

In China for example, tofu is one of the cheapest possible protein sources (think in terms of a massive pallet of it sold for five dollars) but people are generally aware that it is poisonous in some weird ways that won't kill you. Males are generally urged not to consume it.

This could be a knowledge of just the upper class, though. An unspoken suggestion to leave the tofu and soy for the poor.

According to this (https://www.otsuka.co.jp/en/nutraceutical/about/soylution/en...) Japan consumes 8.19 kg/year/person of soy, while the US consumes 0.04 kg/year/person. That's 200x difference. Japanese life expectancy is half a decade longer than the US, not to mention 1/10 the obesity.

I'm surprised how big the difference. 40g/y seems to just eat soy once per year, despite soy are farmed in the US.

So it's all a big conspiracy of the elite against the masses ?

Pretty much anything is a conspiracy if you ask certain people.

No group of professionals meets except to conspire against the public at large.

— Mark Twain

So the vast majority of Asians have disrupted endocrine systems?

Asian cultures also have some of the shortest people, lowest testosterone men, and physically weakest men in the world. Whether this is worth a few more years of lifespan is up to the eater.