Here's something interesting for anyone with insulin resistance or even full blown Type 2 Diabetes. It's reversible.
You can actually become more insulin sensitive and remove markers of T2D by intermittent fasting (IT). Fasting and calorie restriction are two different things. Dr. Jason Fong from Toronto has pioneered work in fasting. There are many myths including those around starvation, burning muscle, hunger, and lack of energy. All of those are not true.
I just came off a 60 hour fast. I only had water, coffee, green tea, and hot salt water (to stave hunger), and a daily multi-vitamin. I was already in nutritional ketosis, so I didn't have to go through the initial stage where your glycogen depletes and your body shifts from using glucose to fatty acids as it's primary source of fuel.
Before you fast, it makes sense to do a ketogenic diet for a week or more first so you can ease yourself into ketosis. Here is Dr. Fung's critical lecture on the benefits and fallacies of fasting:
Oh yeah, I lost 4 pounds (of fat - not water) on this fast, and I'm down 33 since I started eating keto on February 1st. I plan on fasting at least 24 hours every week, possibly twice a week, as I move forward. This will help bring my general insulin level down, which will increase insulin sensitivity, the essence of Type 2 Diabetes.