The few carbohydrates that you eat are a sufficient source of glucose for brain health, as the brain can function very efficiently on ketones. (queenketo.com)
Some researchers believe this has to do with their relative lack of brains, Since ketosis has been thought of as a way to spare glucose for the brain. (ketotic.org)
Therefore, proteins from various body tissues are broken down into amino acids and used by the liver to produce glucose for the brain and muscle. (strengthtrainingendeavors.com)