Sorry to sound stupid on this subject - But when everyone talks about a 36 hour liquid fast, is that just with water (i.e. zero calories in 36 hours) or with miso and stock cubes and tea etc (i.e. not zero calories in 36 hours)?
Because if it is with miso and other hot drinks to keep it as a 'liquid fast' then you are having your calories and in theory as long as it was a liquid you could have your 500 calories.
I would say it's zero calories, and this "liquid fast" term is confusing despite its popularity. It might be because ome say the hunger reflex doesn't kick in if you avoid solid foods. "Zero cal fast" fast would be more precise.