 The dietary requirements of fewer carbohydrates and low glycaemic index have been relaxed with the introduction of faster-acting types of insulin and pump treatment. But several studies have shown that intensive treatment can contribute to preserving more beta cells 17,18, perhaps because the beta cells are quiescent to a higher degree, rather than active, as active beta cells are more sensitive to toxic stimuli 19. In addition, the composition of the diet is important for the glycaemic control 20 and potentially affects the immune system indirectly by affecting the intestinal microflora 21. The quantity and quality of carbohydrates can also be important for the insulin requirement. 