Ketone bodies are a vital source of energy when the body is fasting or if there is a shortage of carbohydrates. There is a lot of misinformation out there about low-carb diets. People often stop losing before they reach their desired weight. If you're on a low-carb diet but not losing weight, here are 15 things you can try. Low-carb diets may offer a potential cure for some of the world's biggest health problems, including obesity and type 2 diabetes.