Ketone monoester is an orally available ketone monoester that serves as a source of nutritional ketones. Ketone monoester increases plasma beta-hydroxybutyrate, acetoacetate, blood glucose, blood sodium, and blood creatinine levels in mouse models. Ketone monoester has the potential to improve athletic performance and endurance in animals. Ketone monoester partially prevents myasthenia in septic mice. Ketone monoester may also be used to study Parkinson’s disease or diabetes.