Halo Top is used as a meal replacement in some WOW challenges and other challenges where calories and nutrition throughout the entire day is controlled by the challenge. However, it is not approved as a meal replacement for a regular Shibboleth day. Most flavors are gluten free but not all so check the container if you need gluten free.
Nutrition in included here for vanilla bean but all flavors are approved. Some flavors are more calories per serving. Do not go over 200 calories for a snack.