Does fasting make your body more efficient in gaining weight?

I've noticed that ever since I've begun fasting, I seem to gain weight extremely quickly (gained 5kg of fat in just one month) even if I just slightly overeat. I realize I've been eating too often and too much of fruits and carbs that's raising my insulin more than necessary, but still, I'm shocked by just how quickly and efficiently my body is putting on fat. If I have lost 20kg fasting and intend to keep that weight off, am I forever bound to only eat within my caloric range and avoid overly glycemic foods to make sure I don't gain weight via /r/intermittentfasting https://ift.tt/8J0zLRX https://ift.tt/O4TwZ5z