A ketogenic (or ‘keto’) diet is an extremely-low carbohydrate diet that is sometimes used as a medical treatment for certain groups of people. The ketogenic diet is sometimes confused with a general ‘low-carb’ diet or promoted as a weight loss technique for healthy people. But it is not recommended for the general population. Carbohydrates, or ‘carbs’, are an important nutrient. They are an excellent source of energy for the body and brain and most foods that contain carbohydrates also provide vitamins, minerals and fibre for good bowel health.