Dr Joslin uses fasting and a low carb diet to treat diabetes.
The Treatment of Diabetes Mellitus
Elliott P. Joslin
"Alternate feeding and fasting are adopted when it is found that the glycosuria persists after a preliminary four days' fast. The method which I have found most successful has been to allow, following the first fasting period, 20 to 40 grams carbohydrate not far from half a gram per kilogram body weight-and about one gram of protein per kilogram for two days.This can be avoided by still further restricting the carbohydrate, either temporarily or permanently. It is always necessary to bear in mind that one food which the diabetic patient cannot do without is protein, and to it everything else must be subservient. While testing the protein tolerance, a small quantity of fat is included in the eggs and meat given."