Inclusion Criteria:  Patients who are overweight or obese (Body Mass Index over 25 and 30, respectively)  Exclusion Criteria:  Individuals <18 years Patients with history of cognitive brain disease including traumatic brain injury, dementia, Parkinson's disease Individuals with uncontrolled neuropsychiatric illnesses or overt hepatic encephalopathy Ongoing alcohol or illicit substance use patients with cirrhosis