Question: How long should our fasting windows be?
I think someone who eats three meals a day and no snacking is doing a form of intermittent fasting that most people aren't doing. And I don't even have a basis for believing whether that is superior, inferior, or the same as one meal a day in a 20 hour, four-hour feeding window. And so I think it's very clear that you want to cycle through the fed and fasted states. I think exactly how you do that is all trial and error and anecdotal accumulation of anecdotes and experiences at this point.
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DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing herein is medical advice.