Study: Those Following a High Fat Diet Live LongestA ketogenic diet — which is very low in net carbohydrates and high in healthy fats — is key for boosting mitochondrial function. Healthy fats also play an important role in maintaining your body's electrical system. When your body is able to burn fat for fuel, your liver creates water-soluble fats called ketones that burn far more efficiently than carbs, thereby creating fewer reactive oxygen species (ROS) and secondary free radicals. Ketones also decrease inflammation, improve glucose metabolism and aid the building of muscle mass. The benefits of a cyclical ketogenic diet are detailed in my latest bestselling book, "Fat for Fuel." While the book was peer-reviewed by over a dozen health experts and scientists, a new large-scale international study (known as the international Prospective Urban Rural Epidemiology, or PURE, study) adds further weight to the premise that high intakes of healthy fats — especially saturated fats — boost health and longevity.