Insulin is a hormone that transforms sugars into energy for your body and controls the level of sugar. A healthy body has a high insulin sensitivity, while people with diabetes have low insulin sensitivity. Fasting can increase the body’s sensitivity to insulin, allowing it to transport glucose from the bloodstream to the cells more efficiently. Coupled with the potential blood sugar-lowering effects of fasting, this could help keep the blood sugar steady, preventing spikes and crashes in the blood sugar levels. Several studies have found that during the fasting process, glucose levels are stabilized which can lead to the prevention of type 2 diabetes. You could say that fasting is a great way of calibrating your insulin. Those diagnosed with a metabolic disease, need to consult your doctor for tailored advice on fasting.