Medium chain triglycerides or mcts have become especially popular as the word spreads about the many benefits of nutritional ketosis or when you successfully use fat as your primary fuel instead of glucose from carbohydrates this burning of high quality fats 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 dr mercola pure power ket