Low Carb Nutrition: Metabolism Diet and Clean Eating for Low Carb The Low Carb Nutrition book covers two distinctive diet plans the metabolism diet and the clean eating diet. Each of these diets promotes nutrition through healthy foods such as whole vegetables, fruits, whole grains, and lean meats. These diets are naturally low in carbs making them excellent choices for those who wish to eat low carbs and high protein. Good carbs are allowed, and the proteins come from lean meats, legumes, and nuts. Good fats are allows such as those found in olives, avocados, and nuts. No junk food is allowed on either of the two diets.