Many dont realise that carnivore/other healthy diets is a lot about taking out the simple carbs. Our carb sources were selected in the 70's when there was fear about how we would produce enough food for everyone. In came industrial agriculture which selected wheat strains based on calorific content. 

As we know today calories isn't the problem. We are in fact getting too many calories. But the lack of life in our topsoil and qbundance of chemicals used in our food chain mean our food leaves a lot to be desired. 

Try taking out bulk carbs and people usually feel a lot better.