Obesity, ADS, alzhimers, lactose intolerance, etc. all begin their “epidemic” rise in the 1970’s. The same time as the healthy eating (i.e.: Meat, salt, and fat are bad; carbs and vegetable oils are good) programs began.
Correlation is not causation, but it is cause for investigation.
Interesting.
I think the bombardment sometimes weekly, of super heat on the nervous system of the developing fetus by ultrasonography is worth considering.
Diet is very very causative in heart disease, and obesity, both which are new, but since the early 20th century.
Whit sugar, flour and pasteurized dairy are problematic, as are products processed from non grass fed meat.
But Autism - I don’t know. Maybe.