Intermitted fasting works on the principle that if you eat 1800kcal in one sitting you are going to puke. I can easily eat even 3000-4000kcal in 1 day, but in one meal going over 1500kcal is very hard.
Edit: Yes I'm wrong I should have said "if you eat 1800kcal of clean food", I forgot the existence of fast food because it is not something common in my country
> Intermitted fasting works on the principle that if you eat 1800kcal in one sitting you are going to puke.
Fasting (intermittent and otherwise) causes several physiological responses that have a wide range of health benefits, including reducing risks for cancer and heart disease, and even completely reversing diabetic symptoms for some people. It is absolutely NOT some cheesy self-help way of tricking yourself into eating less because you "just can't fit any more in there" -- you completely made this up.
A personal anecdote but I eat ~1600-1700 kcal each meal. I've been eating one meal a day for years. This is simply because I don't get hungry until around dinner time.
I believe your whole premise is wrong. I only ever eat "clean food" (haven't really tried fast food for 10-15 years) and can easily go over 4 kkcal in one sitting. Feel just fine afterwards, the stomach can stretch very far if you work at it hard enough.
Nuts, cheese, and vegetable oils are really energy dense.
I also don't consider myself to be a glutton a have a BMI of 21.
It is available, it is just not common, I'm from Sardinia, in my province ( Oristano: an area of 3000 square km) there's only 1 McDonald's, and only teens go there. If you don't live in the main city, a trip to McDonald's can take easily 1 hour or more.
We dove a lot of pizza places, but it is Italian pizza and it is not as caloric as the American version, ours is made with 200grams of dough and has less stuffing as possible, one pizza should be around 800kcal and majority of people I know usually eats 3/4 of it and leaves the remaining 1/4 for the day after
Edit: Yes I'm wrong I should have said "if you eat 1800kcal of clean food", I forgot the existence of fast food because it is not something common in my country