'Ketosis' is a metabolic state characterized by an elevated concentration of ketone bodies in the blood, typically occurring during fasting, carbohydrate restriction, or in uncontrolled diabetes, and can lead to a shift in the body's primary energy source from glucose to fatty acids and ketones.
Polyhydric alcohols having no more than one hydroxy group attached to each carbon atom. They are formed by the reduction of the carbonyl group of a sugar to a hydroxyl group.(From Dorland, 28th ed)