Correction: The vast majority of people can eat anything, and as much, as they want. Insulin resistance is not caused by poor diet. It is caused by a genetic defect that leads to insulin resistance in the face of a variety of factors.
Current research is consistent with the theory that chronic high insulin levels in people with the genetic predisposition for Metabolic Syndrome develop insulin resistance in response to chronically high insulin levels. lifestyle that produces this situation is a high carb diet, not poor nutrition and/or food choices. Once can eat a very healthy diet loaded with carbs, and still wind up diabetic.
Once insulin resistance starts to kick in, it's a vicious circle... Insulin levels become chronically high, no matter what one eats. Eventually insulin resistance becomes bad enough that the pancreas can't keep up, and fasting BG levels start to rise, meeting the medical definition of diabetes.
While it is, of course, good advice to eat well, typing poor nutrition to diabetes as if it's the cause, and therefore the individual's fault, is not only wrong, it can lead to depression because people end up blaming themselves for something they really had little to no control over.
Post diagnosis, a T2 diabetic should get busy losing weight (if overweight), and agressively controlling their BG. Once diabetic, continuing a high carb diet and taking truckloads of insulin will only maintain, or exacerbate the problem.
To me, trying to typify diabetes creates a false dichotomy. In 2009 I was diagnosed with late onset type 2 because I was over 40 years old with a healthy lifestyle and nobody in my family is diabetic. Nobody prescribed anything except food and exercise, which were both well balanced, but a subsequent routine HbA1C test scared the doctors, who asked me to rush to Accident & Emergency (We call the emergency room A&E)twice in one week during May 2012 with suspected type 1 diabetes. Healthcare professionals wanted to pump in insulin and water but my veins froze up and I refused injections unless they were prepared to diagnose the condition they wanted to prescribe for.
To me it is unethical to prescribe prior to diagnosis.
It took months before anyone agreed to do any of the tests (for insulin, ICA and GAD antibodies) which I believed could inform their treatment. Finally the GAD test results were off the scale and type 1 diabetes was diagnosed.
I spent eleven months on insulin and finally found it depressed me more than I could tolerate so I stopped at the beginning of July this year, whereupon my blood sugars went down to below normal. I am delighted that I can influence my immune system and would like to continue to improve it.
I do not know if I can. All I know is that 'experts' misdiagnosed me because of numbers (over 40 years of age must be type 2)and this was inconsistent with my symptoms, which were simply excessive sweat and poor concentration.
Without insulin, my entire energy system seems to have improved and my eyesight and teeth are both returning to normal with some vigilance on my part. It seems that high protein low carbohydrate food intake is good for my health, but I have lost some weight and do not want to become anorexic.
Recently I ate some bread and my blood sugars went up extortionately. My cholesterol is already above normal, so I am requesting an appointment with a dietician. I hope she can give me some advice about how to maintain my weight without upsetting the other numbers.