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By this, I mean sugars which are powdery or in small cubes which are use to make cakes and other delicacies. So no sugar in your Coffee or tea as from now. Replace white bread with wholewheat breads. Stop drinking sodas. These food products have a high glycemic index: they contain a lot of sugar which are digested and absorbed very quickly by the human body. Cancerous cells need a lot of glucose to develop rapidly. A diet with lots of sugars can favorize the development of tumors in your body. Moreover, your pancreas, the organ which produces insulin in your body, must increase its turnover of insulin to break down surplus sugar. This increase of insulin, according to the chief of cancerology department, stimulates the growth and diffusion of cancerous cells. It is imperative then to limit the consumption of fine sugars.