There is no doubt being overweight puts anyone at increased risk of getting diabetes, but there is a little more to it, like genetics, hormones, and more. We've probably all seen relatively thin people who still developed type 2 diabetes. Type 1 diabetes is an autoimmune disease. Symptoms & Causes of Diabetes - NIDDK.Diabetes is caused by years over consuming more energy than the body can burn . Whether that is from fat , carbs , protein, it doesn’t matter . Once the body passes its fat storage threshold, you get diabetes .