Acetoacetate and D-3hudroxybutyrate are produced in the liver and provide an alternative supply of fuel for the br a in under starvation conditions or in diabetes.

• 乙酰乙酸及 D-3- 羟丁酸产生与肝脏，在饥饿时，或患糖尿病时，它们对脑是可供选择的燃料。