From elsewhere in the forum it seems like intermittent fasting is the way to go to lose weight AND fix those beta cells. Sadly I've already lost weight by eating a low carb diet and moving more. I'm now on a BMI of 20 and if I go much lower I'll be pretty skinny (and wrinkly). Is it advisable to fast when you'd rather not loose any more weight? And if you follow the 5-2 diet, how to get the calories high enough on the normal days on a LCHF diet to make a big enough difference when you go 500 cal on fast days. Has anyone tried this without a weight loss in mind? I only want to shock the beta cells into working again, if possible, not lose weight.