Given that Type 2 diabetes is generally believed to be caused by diet, it makes sense that diet could fix it as well.<p>My personal hypothesis is that some people have intestinal bacteria that are really, really good at breaking down sugar very quickly. So when you eat high GI foods, your gut turns them into glucose very quickly releases them into your blood, and your body has to deal accordingly. IMO that would help explain why people who are very obese get type 2 with some regularity, but how otherwise healthy adults who are simply moderately overweight can also develop it.<p>A corollary to this hypothesis is that the ability of your (personal) intestinal bacteria to break down different types of foods at different rates means that there is no such thing as a &quot;universal diet&quot;. Some people will be healthiest eating large amounts of red meat, some will be healthiest on a high-carb diet, while others may need something more fiber-rich (assuming appropriate calorie control, of course). This appears to be borne out anecdotally, with diet plans having different efficacy on different people.<p>Intestinal flora is something the medical community is just now beginning to research and understand. There&#x27;s something unique that happens in our intestines, and while there&#x27;s obviously a genetic component to it, the genes your intestinal flora carry may be just as important. We don&#x27;t understand the system or the feedback loops (maybe eating too much sugar causes these bacteria to over-populate the intestines in some people and crowd out other bacteria?) The point is, there&#x27;s a whole lot we don&#x27;t know about how our bodies process the nutrients we take in. There are a lot of studies underway, but holistic medicine is pretty obviously a real thing -- we just don&#x27;t understand the science behind it yet.