In an obese patient suffering from a fairly advanced case of stable diabetes of many years duration in which the blood sugar may range from 3-400 mg%, it is often possible to stop all antidiabetic medication after the first few days of treatment. The blood sugar continues to drop from day to day and often reaches normal values in 2-3 weeks. As in pregnancy, this phenomenon is not observed in the brittle type of diabetes, and as some cases that are predominantly stable may have a small brittle factor in their clinical makeup, all obese diabetics have to be kept under a very careful and expert watch.
A brittle case of diabetes is primarily due to the inability of the pancreas to produce sufficient insulin, while in the stable type, diencephalic regulations seem to be of greater importance. That is possibly the reason why the stable form responds so well to the HCG method of treating obesity, whereas the brittle type does not. Obese patients are generally suffering from the stable type, but a stable type may gradually change into a brittle one, which is usually associated with a loss of weight. Thus, when an obese diabetic finds that he is losing weight without diet or treatment, he should at once have his diabetes expertly attended to. There is some evidence to suggest that the change from stable to brittle is more liable to occur in patients who are taking insulin for their stable diabetes.
Excerpt from Pounds and Inches, by Dr. Simeons