The Complete Guide to Fasting: Heal Your Body Through Intermittent, Alternate-Day, and Extended Fasting

by Jason Fung

They were absolutely right; it wasn’t good for them. As patients took insulin, they gained weight, and when they did, their type 2 diabetes got worse, demanding more insulin. And the cycle repeated: they took more insulin, they gained more weight, and as they gained more weight, they needed more insulin. It was a classic vicious cycle.

Dr. Fung will talk in more detail about those benefits in the coming chapters, but suffice to say, if you’re struggling with obesity and/or type 2 diabetes, fasting can have an incredible effect on weight and blood sugar. I’ve seen it with my own eyes, even when I was still skeptical about fasting.