Triheptanoin (C7 oil), a triglyceride oil synthesized from castor beans. is an investigational pharmaceutical-grade medical food that has shown potential as a treatment for a number of inherited metabolic diseases. When metabolized by the body, C7 oil produces ketones similar to those produced on a ketogenic diet in addition to other types of ketones that are thought to fulfill further metabolic requirements in the absence of sufficient glucose. A phase 3 clinical trial however failed to find an improvement in patients with GLUT1 DS with disabling movement disorders.