Each carb consumed raises your blood sugar by three points. My mother and a friend were type 2 diabetics and have been able to get completely off injected insulin by monitoring carb intake and regulating it according to activity levels. Here in the US, they have completely dumped the portion control approach to diabetes management and are advocating carb counting. I know my mother's blood sugar levels are only fluctuating between 90 and 110. She checks her sugar several times per day and is very active, walking and cycling.