Usually, your body produces ketones in tiny amounts, but you make more if you restrict carbs or calories. This is because, while most of the body’s organs can use fat for fuel, your brain only runs on glucose or ketones, so if you don’t get enough carbs or calories to make adequate glucose, your liver ramps up ketone production. One of the reasons a keto diet can work for weight-loss is that higher levels of ketones reduces appetite.
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