I'm sorry to tell you this . . .
A diagnosis of pre-diabetes (insulin resistance) can often be reversed if caught early enough, but . . .
Type II Diabetes
is an incurable
dsease and it is also a progressive disease (that means that it does get worse with time). Once you have full-fledged diabetes all you can do is control it in order to avoid some of the terrible side effects.
Some can control Type II Diabetes with diet and exercise alone; some require oral medications to assist in that control; still others require insulin injections as well.
By far the most important thing you can do to get control of your diabetes is to lose your excess weight -- and that is not an easy task since the disease itself, and most of the medications available to treat it, tend to make gaining weight even easier. It can be done, though.
Gastric Bypass surgery has recently been shown to completely reverse the signs of Diabetes within a very short time. This is above and beyond the normal Blood sugar levelling impact shown by weight loss alone. You might want to discuss this option with your Doctor as well.
I would definitely say save your money, my dear . . . there simply is no magical way to overcome this disease.
There are lots of very reputable books on diabetes available through your local bookseller and/or Amazon and I do suggest that you do as much reading and learning about your disease as you possibly can.