Sugar consumption will not directly cause either type of Diabetes - Type 1 or Type 2. However, too much sugar intake can make you overweight, which is a risk factor for Type 2 diabetes. On the other hand, Type 1 diabetes is an autoimmune condition, which causes a person’s immune system to attack the cells that produce insulin. In conclusion, if you are diabetic, eating too much sugar can cause complications once you have the disease. Cutting down sugar from your diet is essential for a healthy lifestyle whether you are diabetic or not.