US researchers recently discovered a particularly health-promoting effect of cherries: their pigments (anthocyanins) stimulate insulin production in the pancreas and can thus lower blood sugar. Insulin moves sugar from the blood into the cells. Doctors believe it is likely that type 2 diabetes can be prevented with the fruit. To achieve this effect, one should eat at least ten cherries a day. Tip: Dark sweet cherries provide the most anthocyanins and are particularly helpful when trying to lower your blood sugar.