Although differing carbohydrates do have different glycaemic responses (glycaemic index), there is limited evidence to show long term glycaemic benefit when low glycaemic index diets versus high glycaemic index diets are implement. The concept of the glycaemic index is perhaps best used for fine tuning postprandial responses after first focusing on total carbohydrate. Although very large amounts of fibre (50 g) can have beneficial effects on postprandial glycaemia, it is doubtful that the majority of patients will regularly consume enough dietary fibre to see this benefit.