There is more supporting evidence Richard doesn’t supply.
AA pound of fat is equal to 3500 kcal. The average person might use 2400 kcal. 2400/3500= .685 pound of energy available if you can access it all. You would need 77 pounds of fat at 31 kcal per fat pound. We do see this type of loss in the early stages of our obese community. Then it tapers down.
Take Angus Barberi who fasted 382 days. He lost an average of .72 pound per day. However if you consider the amount of TDEE required to run 480 pounds, he was likely in the beginning using a pound and a half of fat a day.
Jason Fung sees an average of 1/2 per day on EFs according to his IDM blogposts. Again the math works out. Lets say you are 50 pounds overweight. That is 1550 available fat calories. 1550/3500 = .45 or just under 1/2 pound of energy consumed . Per day.
So I think it is safe to say that the Alpert paper which @richard based his premise on is accurate.
We just completed a ten day fast. After a 2 week feast we will get Dexascan- ed again. I have a calculated amount of fat I think the wife and I lost. being lean the best I could do is about 1/3 pound. She, being heavier should have lost about 1/2 of fat each. No matter what the scale says.
i’ll know next Wed. The math has always worked out in the past.