There are several options when it comes to weight loss. Most people find that replacing one meal with a NutriBlast helps them keep portions in check and not eat too much food. However, if you are choosing to make a NutriBlast that might be lacking in protein then you are more than welcome to add a side of an animal or plant-based protein. It's all about a healthy balance of nutrients and making sure you don't eat more calories than your body needs. It will depend on your personal nutritional needs and preferences. For an average sized person, aim for about 400-500 calories per meal for weight loss.