Then there's all the microplastic and teflon and whatever else seeps into the food supply from industrial equipment operation.
We've not only eliminated a lot of "dirt" but introduced a lot of things which can cause issues whether due to volatility or chemical stability causing inability of the body to clear it up.
B) the people with really bad food allergies like Coeliac just died young.
We have severe amnesia when it comes to just how rough the state of health was until basically the 50s (eradicating Polio is a big turning point). Fortunately, we can learn about history so we don't repeat it :massive eyeroll:
Coeliac is just a word that means "relating to the abdomen", Coeliac Disease is a disease of the abdomen characterized by an immune response to gluten that causes the villi in the intestines to consume themselves, among other characteristic symptoms. Coeliac (or Celiac) Disease is not a food allergy.