The Gut-Brain Axis During Neurorehabilitation; Prebiotic Treatment to Alter the Gut Microbiome and Neurologic Symptoms

Brain Injury Patients Inclusion * Ages 18 and above * Admitted to Moody Neurorehabilitation Institute for care * Less than 6 months post-injury * English speaking * Must be able to eat and drink by mouth * Willing and able to comply with study procedures * Willing and able to provide consent (with LAR if needed) Exclusion * Significant heart, liver, kidney, blood or respiratory disease * HIV, Hepatitis B or Hepatitis C * Pregnancy or becoming pregnant during the study * History of inflammatory bowel disease * History of celiac disease * Active diverticular disease * Known allergy to study agent * Any medical condition that, in the opinion of the investigator, would place the subject at increased risk for participation Community Control Subjects Inclusion * Ages 18 and above * Have a family member who is admitted to Moody Neurorehabilitation Institute for care OR is working at Moody Neurorehabilitation Institute * English speaking * Willing and able to comply with study procedures * Willing and able to provide consent * FACs score ≤ 50 Exclusion * Trauma to head in last 6 months * Stroke in last 6 months * Significant heart, liver, kidney, blood or respiratory disease * HIV, Hepatitis B or Hepatitis C * Pregnancy or becoming pregnant during the study * History of inflammatory bowel disease * History of celiac disease * Active diverticular disease * Any medical condition that, in the opinion of the investigator, would place the subject at increased risk for participation