Effects of an international ceremonial ayahuasca retreat on the diversity and community composition of the human gut microbiome: A preliminary observational single-arm pre-post study
Brain Behavior and Immunity Integrative July 1, 2026 Lyanna R. Kessler, Lamya'a Dawud, John D. Sterrett et al.
ABSTRACT Posttraumatic stress disorder (PTSD) is a mental health condition that can develop following exposure to a traumatic event, often with persistent anxiety and depressive symptoms. Recent research suggests the microbiome-gut-brain axis may play an important role in the etiology and pathophysiology of PTSD. At the same time, retreats incorporating psychedelic-assisted therapies have...