&gt; there are severely underweight people (like my dad, who is literally skin and bones, and I mean concentration camp prisoner of war underweight where you see every rib from the back) who still somehow developed type 2 diabetes. So, there has to be a strong generic component to type 2 diabetes.<p>That may not have been T2DM.  One of the things research has revealed over the past 30 or so years is that there are far more manifestations of diabetes than the old two-mode model though.  Incidentally, that is one reason the types were renamed &quot;Type 1&quot; and &quot;Type 2&quot;, to acknowledge that there are likely more types.  There is a particular subtype known as Latent Autoimmune Diabetes in Adults (LADA), which some researchers have named &quot;Type 1.5&quot; because it shows signs of both T1DM and T2DM.  It initially presents as T2DM, though, so people are often misdiagnosed at first.  This manifestation has only been known for about 20 years, though, so it isn&#x27;t surprising.<p>&gt; Also, no one gets cured of diabetes type 2, you just control your blood glucose levels better and in effect alleviate the symptoms of diabetes, but you still have diabetes. If you think you don&#x27;t, do a glucose tolerance test (i.e. drink a sweet drink and measure your blood glucose 1 hr later) and you will find that your glucose tolerance is still compromised no matter how well you managed to control your glucose levels by avoiding eating high glycemic food for life.<p>This is flat-out contradicted by Dr. Taylor&#x27;s research.  He is demonstrating that patients on a hypocaloric diet, either from bariatric surgery or just a medically-supervised diet, can (and in many cases do) regain normal glucose control after about 10% loss of body weight.  I personally went from borderline diabetic to normal glucose control (I <i>can</i> pass an OGTT) after a four-month, 35lb weight loss.  I changed nothing about my diet except amount of consumption.