I don't want to discount your experience, but as with a post advocating for fasting, you need to put a personal experience/your mileage may vary disclaimer on here, because your experience isn't going to be what everyone will experience.
I've done fasting in pretty varied ways. The longest was for eight days. What I usually do now is a 24-hour fast: dinner, skip the following breakfast and lunch, and then dinner.
When I fasted for eight days, I dropped about ten pounds. On a 24-hour cycle of fasting, I will drop between 1 and 2 pounds a day depending on activity level. I have never had the experience of gaining 20lb after fasting, nor have I ever felt like I was in famine mode. I think I gain weight a bit quicker than before I started doing the 24-hour fasts, but at the same time, it drops off quicker, too (it's true that fasting changes how your body stores and uses fat).
If you go from fasting back to junk food binges three or four times a day, yes, you will (unsurprisingly) gain the weight back. If you're putting 6k calories a day in, nothing about the effects of that are going to go away after your fast. If you go from fasting back to a reasonably balanced diet, the weight isn't coming back--if you aren't overeating, how could it?
This has been my experience. Your mileage may vary. I am not a doctor and this is not medical advice.
I've done fasting in pretty varied ways. The longest was for eight days. What I usually do now is a 24-hour fast: dinner, skip the following breakfast and lunch, and then dinner.
When I fasted for eight days, I dropped about ten pounds. On a 24-hour cycle of fasting, I will drop between 1 and 2 pounds a day depending on activity level. I have never had the experience of gaining 20lb after fasting, nor have I ever felt like I was in famine mode. I think I gain weight a bit quicker than before I started doing the 24-hour fasts, but at the same time, it drops off quicker, too (it's true that fasting changes how your body stores and uses fat).
If you go from fasting back to junk food binges three or four times a day, yes, you will (unsurprisingly) gain the weight back. If you're putting 6k calories a day in, nothing about the effects of that are going to go away after your fast. If you go from fasting back to a reasonably balanced diet, the weight isn't coming back--if you aren't overeating, how could it?
This has been my experience. Your mileage may vary. I am not a doctor and this is not medical advice.