You’ve come to the right place. Lots of good info here, and many good people who have reversed their own health issues.
McDougall Common Health Problems
https://www.drmcdougall.com/health/educ ... -juvenile/McDougall Hot Topics
https://www.drmcdougall.com/health/educ ... /diabetes/An index of links to articles specific to diabetes. Some of these explain in detail the reasons behind different diet recommendations.
I found this one particularly interesting: Feb 2004 Newsletter (Type 2 Diabetes: Expected Adaptation to Over-nutrition) Explains purpose of both insulin resistance (avoid becoming too fat) and sweet urine (avoid too much blood sugar).
http://www.nealhendrickson.com/mcdougal ... abetes.htmIn a nut shell, insulin resistance is caused by fat stored in cells not designed to store fat, particularly muscles and liver. Get the fat out of the cells, and insulin sensitivity improves. Get the fat out by not eating added fats or oils, eating low fat whole foods, and generally eating whole grains, beans and potatoes, which provide energy and satiety, with additions of fruits and vegetables, for flavor and variety. You can both be full and satisfied, while reducing your calories such that stored fat is metabolized. When insulin sensitivity returns to normal, the sustained high insulin levels that cause A1C to rise goes away. When everything is working, temporary rises are normal and expected response to food.
Both Dr Neil Barnard (PCRM) as well as Dr Cyrus Kambata, PhD (Mastering Diabetes), talk about this extensively too.
If it makes you feel more comfortable, you can always focus on lower glycemic foods like whole grains, beans, lentils and sweet potatoes, until your insulin sensitivity improves. There is no need to eat any particular food like white potatoes. Just some of us like them, and there is no need to fear them. It’s the french fry oil, and toppings like butter, cheese and bacon fat, that are damaging to our health.