Definition of Diabetes published by Lily Research Library, 1980. February 20, 2018

Diabetes mellitus is a chronic systemic disease characterized by disorders in

•  metabolism of insulin and  carbohydrate, fat, and protein and 
• the structure and function of blood vessels,

The principle early symptoms and sings are usually related to the metabolic defects, findings late in the disease are linked with complications resulting from vascular defects.
Diabetes Mellitus
Eighth edition published by Lily Research Libraries, 1980

         So, according to Lilly Research Libraries diabetes is disorders in metabolism of insulin among with fat, protein and carbs. But still, it is abnormal metabolism of insulin. Now it is soon to be 100 years since insulin discovery. The first successful treatment of diabetes was treatment with insulin added in injections. If so, then how insulin possibly would metabolize if there is no insulin at all secreted by patient's pancreas? Simple, obvious, but still out of any effect and logic. Regardless if there is insulin secreted by patient's ill pancreas, or if even pancreas is absent, still diabetes is metabolic disorder of insulin, right?
      There is no logic in this definition of diabetes mellitus.It is not possible to use what we do not have. We cannot buy food if we do not have money; we cannot eat if there is no food available to eat, and no one human body can metabolize insulin if there is no insulin secretion.
     Second part of definition even more falling apart from the reality. How structure of blood vessels effect metabolism of fat, carbs, and proteins? What wrong with blood vessels in diabetics body? If there is disorder then test must be run to find out if this disorder present or not, right? How structure or defect in blood vessel structure identified or diagnosed? Otherwise there is not possible to see if treatment applied effective or not.
      One of most effective test to diagnose diabetes is Glucose Tolerance test. At the same time before glucose tolerance test would be Rx patient must be identified as diabetic. Test on glucose tolerance only to confirm diagnose, not to make it is initial identification.
      So, patient come to clinic, fasting, and test for level of sugar in blood taken. Now I am lost. In diabetic body there is no insulin to be metabolized; the fat, carbs and protein also absent because of fasting stage, and it is identified if patient diabetic or not. The problem is not that there would not be high level of sugar in blood. The matter of fact, blood sugar is high. What is diagnose? In all education official medical recommendation is to find out if one diabetic, pre-diabetic, or diabetes already fully established. Still, there is big difference between early stage any disease and late stage of the same medical condition. What is it? with what level of sugar in blood diabetic is in critical condition and must be treated in ICU in hospital?
      When blood sugar is high there is no time to order glucose tolerance test. Anyway, what is this test about? How diabetic metabolize carbohydrates? What about fat and proteins? And what about blood vessel structure and function? This test does not give any answers to any one of these questions. If so, then how disorder identified? How treatment effect would be controlled? How to see if disease was cured or controlled with treatment?
     Most effective test to diagnose disease diagnose nothing. Even more then that, this test does not show the stage of disease development. Test developed to find out only if sugar in blood go up after eating carbs. Still, it is not diagnose yet. In the same part of book authors publish that many factors can effect blood sugar level, even rain outside. On the other hand, this test does not show if diabetes in full bloom and fatal stage of development. Test created only for lowest numbers of abnormal level in blood. There is no any recommendations or diagnosis if stage of diabetes already critical.

via Ravenvoron