Dr. Mercola Ketone Energy MCT OilMedium chain triglycerides, or MCTs, have become especially popular as the word spreads about the many benefits of nutritional ketosis. This burning of high quality fats as your primary fuel instead of glucose from carbohydrates produces ketones. Ketones are the ideal fuel for your mitochondria because they burn cleanly and produce far fewer damaging free radicals or reactive oxygen species (ROS), compared to glucose from carbohydrates. MCT oil is