An accurate glycemic index chart that covers many common foods is published by Harvard Medical School on its website. Glycemic index measures how certain foods raise blood glucose levels, according to the American Diabetes Foundation.
Understanding how glycemic index affects blood sugar can help diabetic patients plan healthy meals and manage their blood glucose levels, according to the American Diabetes Foundation. Diabetic patients can create balanced meals by pairing high-glycemic-index foods with lower ones. A glycemic index of 55 or less is considered low, between 55 and 69 is considered medium and above 69 is considered high. While creating meals with a low glycemic index can help regulate blood sugar, it is important to eat a well-balanced meal with a variety of foods.