[DoreenMichele]

The truth is we are only just now beginning to understand the impact of food on health and we have tons more to learn.

https://en.m.wikipedia.org/wiki/Semmelweis_reflex

https://en.m.wikipedia.org/wiki/Ignaz_Semmelweis

[PostOnce]

I provided some evidence (billions of people have been eating many kinds of grains since the dawn of agriculture).

The Semmelweis effect is regarding rejecting new evidence -- and yet you provide no evidence, while dismissing mine.

Perhaps you should question your beliefs.