This sign shouldn't be all that surprising either. Sugar has no fiber or protein, which is why you don't get full and still want more. This is why you end up consuming a ton of calories when eating sweetened foods. Sugar also stimulates the release of insulin, so the more we eat, the more we tell our body to make insulin. Excessive sugar consumption can cause insulin resistance over a certain period of time, and that is the driving factor that leads to type 2 diabetes, gestational diabetes and prediabetes.