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Refined grains in
white bread and other
white flour foods can increase blood sugar levels, which lead to insulin resistance. This can raise your risk of colon
cancer—as well as other
cancers like kidney
cancer. Grains are also a leading source of fiber in people's diets.Foods that are high on the glycemic index are known to raise blood sugar and insulin levels, which can cause health problems that may lead to
cancer. Recently, bread, bagels, and other carbs with white
flour have been linked to lung
cancer.