Oh, there are certainly a multitude of diet religions out there. Paleos, vegans, vegetarians, pescatarians, non-celiac glutenphobes, ketos, the list goes on and on. Recently my mother-in-law read a book blaming all of the ills of the world on lectins that she took to heart, and wouldn't eat beans or tomatoes or grains for months.

The most aggravating thing about the diet religions is that nobody seems to be able to keep to themselves and practice quietly, they are compelled to evangelize and convert the heathen to the True Way. It's very tiresome when you have more important things to be concerned about than what you are putting down your gullet.