Lately, there are a lot of diabetes snack bars being sold like DM Choice bar, the Glucerna bar, NiteBite or Extendabar. Most of these bars are meant to be eaten as a pre-bed snack to prevent low blood sugars in the middle of the night for people who take bedtime insulin. Almost all of them contain some kind of uncooked cornstarch or soluble fiber (fiber that dissolves in water to form a gel); this helps the bars to be broken down slowly. Some bars like Glucerna and DM Choice bar can be eaten as a snack and are usually worth about 1-2 carb exchanges. There is nothing super healthy or magical about these bars but some people find them convenient if they are on the run. They also often contain added vitamins and minerals like vitamin C and iron.