Some people are looking at this study, and the studies about
intermittent fasting that seem to show improved BG indicators, and doing the JUDDD program. (Up day/down day, or alternate day diet)
Basically, you eat about 600 calories one day, then the next 2200 or so. The two-day average is about what you'd need to lose weight (1400, in this case), but your body doesn't go into the dreaded "starvation mode". The every-other-day refeeding keeps you from changing your metabolism, and the
calorie restriction can give you health benefits (better insulin response, anti-aging and reduced risk of cancer, for three). I've heard those who follow it say that as long as you eat your full allotment of up-day calories, the down-day restriction isn't that bad.
I've been trying it now for about a week (was doing IF for the last few months), and am liking it quite a bit. The scale is beginning to move in the right direction again, and my blood sugars are stabilizing.
YMMV... I am an unmedicated pre-diabetic, so it may be more dangerous to try a diet plan that restricts food if you need diabetes medications.