"Some folks" sincerely believe vaccines cause autism. "Some folks" believe the earth is flat.
I don't care what "some folks" beliefs are, I care about the ground truth.
It doesn't take a lot of equipment to deduce that billions of people eating grains consistently over the course of millenia means that people are in fact well equipped to eat grains.
how cereal grains—the world’s most abundant food source—can affect human behavior and mental health. We present the implications for the psychological sciences of the findings that, in all of us, bread (1) makes the gut more permeable and can thus encourage the migration of food particles to sites where they are not expected, prompting the immune system to attack both these particles and brain-relevant substances that resemble them, and (2) releases opioid-like compounds, capable of causing mental derangement if they make it to the brain. A grain-free diet, although difficult to maintain (especially for those that need it the most), could improve the mental health of many and be a complete cure for others."
I don't care what "some folks" beliefs are, I care about the ground truth.
It doesn't take a lot of equipment to deduce that billions of people eating grains consistently over the course of millenia means that people are in fact well equipped to eat grains.