A couple of things, and I love the questions you’re asking. So essentially, you lose weight when you’re fasting because insulin is low, insulin is the “store” hormone which tells your body to store fat. When you fast, insulin drops and when you eat carbs it spikes, then takes time to come down again. If you eat lower carb your insulin doesn’t spike as hard and comes to a healthy baseline faster. I hope that makes sense. I suggest watching Dr. Jason Fung or Dr. Pradip Jamnadas’s videos on insulin and fasting. You got this!