https://www.youtube.com/watch?v=xyNHvogMFDI&ab_channel=DocumentaryCentral
They've been lying to us about this since the 1960's.
If you can't starve a population to death to force them into submisison (like Stalin did...or Japan in China etc), make them too sick, both mentally and physically (bad gut health is directly linked to depressive disorders) to rise up and fight back.