 Quote by Ivan Seeking
So I have to think this notion that it is simple matter of calories is at best selective. Maybe for some people, but I reject that claim 100%. When I went on this diet, I was still eating 1500 calories a day, but I was shedding weight so fast that it scared my wife.
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Well, most people who diet do not enter the state of ketosis thus the amount of calories consumed should be predictive for their weight gain/loss.
Ketosis is an inefficient metabolic state where energy from fatty acids is partly wasted (acetone) thus caloric requirement for sustained weight becomes higher. I tried to look up exactly what the ratio of energy production is of a normal metabolism vs a ketogenic metabolism, but unfortunately couldn't find it. It would be interesting to know the numbers..