this is my 15th day of water fasting and I have kept track of my daily weight. I’ve done water fasting several times now and the weight loss follows always the same pattern. First, I lose a lot of weight on the first 3-4 days (about 12 pounds, or 5.5 kg), then the weight loss continues more or less linear, about 1 pound (0.5 kg) a day, but reducing slowly over time.
I understand that the first days, the body losses a lot of water that doesn’t need any more because of the reduce insulin levels, and that would explain why I lose so much water at once when starting the fasting. However, the loss weight I experience over the following days is far more than the expected fat loss as suggested by Dr Jason Fung in his book. He writes that expected fast loss should be about 0.5 pounds per day. I experience twice as much. Has anybody any insight of why might be the case? I play soccer on weekends, but otherwise, I sit all day in a desk, so no meaningful extra calories are burned to explain so much weight loss. I’m wondering whether I’m not just losing fat, but also muscle or if my body continue to get rid of more and more water over time. Or is it reasonable to expect so much fat loss in a single day?