Exercise to burn sugar for fuel and to increase insulin sensitivity. Avoid carbs and stock up on soluble fibre-rich foods to regulate your sugar spikes. Stay hydrated to prevent your liver from producing sugar. Chew slowly, eat chromium and magnesium-rich foods (with low glycemic indices), and reduce your portion size. Glucagon and cortisol spike sugar - avoid stress and sleep well. High blood sugar occurs when your body can’t effectively transport sugar from blood into cells. When left unchecked, this can lead to diabetes.