Lots of studies out there which are correlational and thus meaningless, or worse, studies which intentionally produce false results due to being bought-and-paid

Lots of studies out there which are correlational and thus meaningless, or worse, studies which intentionally produce false results due to being bought-and-paid-for. I don't have time to look at each link that page cites, but for example the American Heart Association is a terrible entity with worse than worthless recommendations which are completely not backed up by science. Most of human evolutionary history was hunter-gatherer times, and they were not eating wheat. Farming is a relatively recent invention.