>One way that this can happen is by eating refined (simple) carbs - aka sugars. Refined carbs are complex carbs not simple sugars. Fructose in fruit is a simpl

>One way that this can happen is by eating refined (simple) carbs - aka sugars. Refined carbs are complex carbs not simple sugars. Fructose in fruit is a simple sugar, sucrose (table sugar) is a simple sugar. Bread, pasta and anything containing wheat is a complex refined carb. There are refined sugars however like high fructose corn syrup which btw doesn't have the same composition as normal fructose, hence the deleterious effects. Refined carbs cause insulin problems more than fructose from fruit, that's why you never feel bad after eating fruit but you can get a food coma after eating too much pasta. The reason is because your body releases the insulin before the complex carbs are fully broken down lowering your blood sugar to below normal levels. With fructose because it is so bioavailable your insulin and blood sugar spike at the same time, in sync, resulting in normal blood sugar levels and a stable mood and energy level. When you start eating cake is where you get into trouble because it contains, guess what... refined carbs in the form of flour. That's why you feel just as bad after eating a lot of bread as a lot of cake despite one having a lot more sucrose. Sucrose is fairly similar to fructose. It's the not sucrose that's the problem, it's the complex carbs. >Not sure what an anecdotal observation of people on a weird diet proves. These people pride themselves on eating 3000+ calories a day and are dangerously skinny. What I'm saying is you can't get fat eating just fruit. These people are also incredibly unhealthy and I wouldn't recommend anyone eats like that but I think it does prove the point that the sugar in fruit is not the same as normal sugar.