The 10 times is a huge overstatement.
“The 10 times is a huge overstatement.”
Agree - it’s all calorie balance. Fat is roughly 3500 calories per pound, so if you exercise a bit you’ll lose about 0.7 pounds per day by fasting (once you go ketogenic - about 60 hours after starting a fast), of which I’ve done many times, for long periods. During the first 60 hours, you’ll think you’re losing weight much faster, but that’s just because your body is clearing out the food it has, and is burning non-fat energy stores, which are not nearly as storage-efficient as fat. But after 5 days of fasting (water only), the numbers will not lie.