Metabolism in the Human Brain Following Consumption of a Keto-ester in Alcohol Use Disorder (AUD) With Proton Magnetic Resonance Spectroscopic Imaging (MRSI)

Inclusion Criteria: * For AUD patients: individuals assessed to be with mild to - medium severity according to the DSM-5 criteria. * For non-dependent heavy at-risk drinkers: must be Individuals who consume more than 14 drinks per week for men or more than 8 drinks per week for women, for at least the last 2 months. * For healthy controls: must be light drinkers not dependent on alcohol, who consume fewer than 2 drinks per week for at least the last 6 months. * English speaking * Can read and understand a study the consent form Exclusion Criteria: * Non-English speaking * Unable to read and understand the consent form * History of alcohol withdrawal in the last 12 months. This will reduce chances of a volunteer having withdrawal symptoms in the middle of the experiment. * Participants with a history of psychiatric conditions (that include PTSD, schizophrenia, and bipolar disorders), or a history of neurological conditions * Women who test positive on a pregnancy test collected on either the screening visit or day of the study. * Healthy subjects identified with substance use with the exception of tobacco and alcohol will be excluded. * AC subjects identified with substance use, with the exception of tobacco, alcohol, and mild cannabis use disorder (based on the DSM-5 criteria during the medical history) in the last 6 months, will be excluded. * Persons unable to refrain from alcohol use for 48 hours and undergo a 10-hour fast prior to the study