I’m the commenter who eats once a day. Not sure, if that’s the information you’re looking for, but I could easily do 48 hours without negative impact on my well being. I don’t do “real” fasting, but my body is really forgoving in the meantime. I don’t feel hangry or tired. If I can’t get my food in time, I’ll just get it later. Sometimes it feels like a tiny superpower compared to other people who sometimes seem to really suffer in such situations.