Bread is a big part of many diets and can affect blood sugar levels. Researchers tested different types of bread to see how they impact blood sugar. They found that bread made from whole grains doesn't always have a lower glycemic index (GI) than regular bread. However, adding ground flaxseed to bread can lower its GI. So, if you want to choose a healthier bread option, look for ones with ground flaxseed in them.