The Brain, the Bug, and the Binge: the Interplay Between Binge Drinking, Gut Microbiota, and Brain Functioning

Inclusion Criteria: * College students whose native language is Portuguese; * Age 18-23 years; * Binge Drinkers: report (i) drinking 4 (for women)/5 (for men) or more drinks on one occasion at least once a month, (ii) drinking at a speed of at least two drinks per hour during these episodes (which brings blood alcohol concentration to 0.08 g/dL or above), and (iii) having an AUDIT score \< 20. * Non/Low-Drinkers: report (i) never drinking 4/5 or more drinks on one occasion and (ii) having an AUDIT score ≤ 4. Exclusion Criteria: * Use of illicit drugs as determined by the Drug Use Disorders Identification Test (DUDIT); * Alcohol abuse (i.e., AUDIT ≥ 20); * Personal history of psychopathological disorders (according to DSM-V criteria); * History of traumatic brain injury or neurological disorder; * Family history (mother/father) of alcoholism diagnosis of substance abuse; * Occurrence of one or more episodes of loss of consciousness for more than 30 minutes; * Non-corrected sensory deficits; * Diagnosis of any gut disease/problems or other medical conditions: inflammatory bowel disease, irritable bowel syndrome, Crohn's Disease, celiac disease, lactose intolerance, autoimmune disease; * Consumption of medical drugs with psychoactive effects (e.g., antidepressants, anxiolytics or benzodiazepines) during the 4 weeks prior to the experiment; * Use of any of the following drugs in the last 4 weeks: laxatives, antibiotics, anticoagulants, non-steroidal anti-inflammatory drugs, analgesics, corticosteroids; * No type of metal object implanted in the body, especially in the head (orthodontic appliances are not excluded).