About GI The glycaemic index (GI) measures how quickly carbohydrate is broken down into glucose and entered into the bloodstream. There are times when you want this to happen quickly for instance after an intense workout. On these occassions you will look to refuel with predominantly High GI foods. On other occassions you will want glucose to be drip fed into the blood system for a steady stream of energy. This is neccessary for when you want to be at your sharpest and you will need low and medium GI foods. As High GI foods enter the blood stream quickly they can if they are not burned quickly (as they would be post exercise) give you a surge of energy but the downside is that once you have had that high and the insulin has done its job you will invariably feel hungry again. The problem is that you can become addicted to this high and the desire to reach for these High GI foods becomes more and more frequent. Long term this could lead to weight gain & diabetes. So if you find you are hungry within 2 hours of eating and there is no explanation (like you have been exercising for 30 minutes) then take a look at the carbohydrate you have eaten. It will probably be High GI and then switch to a lower GI and feel the benefits.