Just an update from Nielson and Joensson, original comment here. Happened on it while chasing assorted lipoprotein numbers for another post.
HbA1c below 5% without meds is possible through diet. I wouldn't describe these people as cured, a pizza a week would have them in trouble, but with HbA1c this low I'd not be worrying about CVD too much.
"Of the total of 10 controls, who have switched diet, 2 persons after a weight reduction of 20 kg each are free of all signs of diabetes after 3 and 2 years respectively i.e. HbA1c below 5.0%, fasting blood glucose below 5.0 mmol/l and free of any blood glucose lowering medication"
Second comment is that, even with successful weight loss and diabetes imporvement, carb creep is real and hard to avoid.
"After 22 months 2 patients had resumed insulin treatment following an increase of carbohydrates."
I know that rye crisp bread was a feature of this diet. I wonder what would have happened in the complete absence of gluten? Or whether the problems of removing this potentially addictive carbohydrate source would just have sabotaged the initial compliance?