The QNT Protein Burst bar contains three of the best sources of protein Whey Isolate Calcium Caseinate amp Soya Protein. The confectionary taste of these bars makes them a fantastic snack for any time of the day. However they are best used as a recovery products after a workout. The rich source of protein will help give your muscles what they need to rebuild & recovery quickly & effectively. These bars also contain a good source of carbohydrates to help maintain energy levels.