Carnitine, which exists at high levels in your brain, helps it use fat for fuel and sense energy levels. When you switch to low-carb or keto diets, carnitine can ease the temporary fatigue and brain fog known as keto flu.
Because the brain runs on a lot of different fuels, fats being one of them, carnitine is used in very high levels in the brain. And so it can help us with the central perception of energy in our body as well as that peripheral one. The next thing is if you switch your diet, especially if you are fasting, if you do a low carbohydrate diet or you'd go on a ketogenic diet, you can have a dip in energy that they call the keto flu, right? You feel yucky and tired and everything.
