Two firms that are particularly well know for the the low carb bars that they produce are Atkins and AdvantEdge. These companies are market leaders in the increasingly confusing low carb bar market. A typical low carb bar rich in fiber and extremely low in carbohydrates and are quite filling. Balance is another firm that makes a down market type of low carb bar. These bars are perfect as a snack and can even be used to replace meals in some diets. Please consult with a nutritionist before attempt this.