Intermittent Fasting, as described on the internet, doesn't involve eating less food but rather eating within a narrower time window. You can get 16-23 hours of fasting in a 24 hour day, and suggestions are that useful changes happen around 12 hours after eating, and (e.g. work of Prof. Sachin Panda) that fasts of this kind of length can do significant good for animal health.
Are you talking of this kind of thing, low body fat makes even this difficult, or are you talking of multi-day fasting?
Are you talking of this kind of thing, low body fat makes even this difficult, or are you talking of multi-day fasting?