He means Ketones. When you are eating excessive sugars and carbs like most people today, your body doesn't burn fat. You only use sugars for energy. That's why

He means Ketones. When you are eating excessive sugars and carbs like most people today, your body doesn't burn fat. You only use sugars for energy. That's why you have your energy levels constantly up and down. I have been on ketagonic diet last 3 months. I eat no sugars and less than 50gr carbs. My energy levels are always stable now, lost 20lb. I don't need glucose for energy. I see it as winter mode vs summer mode: - If it's is summer there are sugars and carbs. So, your body keep storing as much fat as possible and uses carbs for energy and pushes you to eat as much as you can. Making you feel hungry all the time so you eat more and store more fat. - if it is winter, there are nothing much to eat, so your body uses fat as energy. The problem with modern world is that there are just so much food and carbs around us that we are always in summer mode.