Normally, the pancreas makes the hormone, insulin, to help the body store and use the sugars and starches that you eat. Diabetes develops when the pancreas does not make enough insulin, or the cells in your body become resistant to insulin, Insulin usually keeps a tight control on blood sugar levels. People with diabetes have blood sugar levels that high and need to be through diet, medication, and lifestyle changes. Diabetes affects your digestive health as a result of poor nutrition and uncontrolled blood sugar levels.