Hydrogen Water FMT Improves Autism Symptoms in Children Study Shows
- Authors
- Masahiko Shirotani, Shin Shimizu, Kunihiro Kitamura, Yasuhito Mikawa, Reiko Haruna, Yuichi Kawai, Seiji Koide, Ikuko Mohri, Hideo Matsuzaki, Kenji J Tsuchiya, Yoshimu Tanaka, Taiichi Katayama
- Journal
- Frontiers in Pediatrics
- Year
- 2026
- DOI
- 10.3389/fped.2026.1767346
- Study Type
- Human
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- Japan
- Health Condition
- Autism Spectrum Disorder
- Body System
- Neurological
TL;DR
Hydrogen nanobubble–based fecal microbiota transplantation improved autism-related symptoms and gut health in a small single-arm clinical study, with no reported adverse events.
Key Finding
Children with autism spectrum disorder who received fecal microbiota transplantation in hydrogen nanobubble water showed a 29% improvement in social responsiveness scores that was sustained one year later, with 19 of 30 children improving from severe to mild or normal symptom levels.
Summary
This study tested a new treatment for autism spectrum disorder (ASD) in 30 children aged 5-12 years. The treatment involved giving children a fecal microbiota transplant (a transfer of healthy gut bacteria from a donor) suspended in hydrogen nanobubble water (water containing tiny hydrogen bubbles) through an enema, without using antibiotics or bowel cleansing. After 30 weeks, children showed a 29% improvement in social responsiveness scores, and 19 of the most severely affected children improved to mild or normal levels. The treatment also reduced sensory, digestive, and emotional symptoms, with no serious side effects reported.
Practical Takeaway
While this early-stage study suggests hydrogen nanobubble water may help deliver fecal microbiota transplants safely in children with ASD, it is a small, single-arm trial without a comparison group, making it difficult to determine how much benefit comes from the hydrogen water itself versus the transplant alone. Much larger, controlled studies would be needed before this approach could be recommended as a standard treatment. Parents should consult healthcare providers before considering any experimental microbiota-based therapies.
Abstract (excerpt)
Background Autism spectrum disorder (ASD) is rising in prevalence, but effective treatments for its core symptoms remain limited. Fecal microbiota transplantation (FMT) has shown promise; however, conventional methods often require antibiotics and bowel cleansing, raising concerns regarding safety…