Some issues are black and white with carbs being a case in point. There are good carbs and bad carbs. Carbs low on the glycemic index (GI) are good and conversely those high on the scale aren't. High GI foods have been linked to a variety of problems, from acne to Alzheimer's as well as increasing your risk of type 2 diabetes. New research shows that foods low on the glycemic index release a hormone in your gut to make you feel satiated, helping you avoid overeating. A rating of 50 or under on the index indicates a low GI food and a rating above 70 puts a food in the bad column. For instance, three ounces of soy beans rate 18 on the GI, but one ounce of a French baguette is 95. So choose foods with a low GI rating, like whole grain bread, which has a rating of 40 instead of white bread, which is rated 70.