Earlier quoted context omitted.
Fung is a quack.
Agreed. I've read his book on diabetes and intermittent fasting. I have a problem with anybody who makes the claim that there is more to weight loss than "calories in calories out". There isn't.
Why must the body adhere to a reductionist calories-in/calories-out model as if it’s a simple furnace, when it’s clearly vastly different from a furnace?
Why the need to ignore the involvement of neurotransmitters, hormones, enzymes, organ function, emotions, microbiotas, inflammation, and countless other inter-related components and processes that would easily explain why metabolism differs so much from one person to another, as distinct from furnaces that all combust in the same way?
I mean, sure, calories-in/calories-out is ultimately right when you reduce everything down, but why the need to wave away the influence of the above factors on the flow of calories in and calories out?