Was exercise a part of this diet? My doctor said the same as yours, he originally wanted to put me on metformin, I was like ummmm... no, for reasons. He was like then you're going to have to watch what you eat, exercise. Lose some weight and he recommended cardio. He said walking/running really helps to bring down blood sugar and also greatly helps losing weight. I only run when I'm being chased by ax murderers. So yeah, not a lot. But I do like to go biking on my road bike/mountain bike. Or hit the elliptical at the gym.