[yummypaint]

Think of IF as excercise for your cells' different metabolic pathways. People are able to live without ever walking or running, and some do, but that doesn't mean it's a good idea to never excercise.

I know some people who have NEVER in their lives gone more than ~12 hours without a meal, and all of them are ~30 years old but with the standard array of contemporary american health problems more typical of people in their 40s. Our ancestors certainly entered ketosis at least occasionally. It seems like a drastic change to switch to never using that cellular process over a span of just 1 or 2 generations.