Skip to content

Effects of GABA with Butyrate, GABA/Butyrate-producing Synbiotics on Pain Relief in Fibromyalgia: A Phase II, Multi-Center, Double-Blinded, Randomized-Controlled Trial

Effects of GABA with Butyrate, GABA/Butyrate-producing Synbiotics on Pain Relief in Fibromyalgia: A Phase II, Multi-Center, Double-Blinded, Randomized-Controlled Trial

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2500115868
Enrollment
Unknown
Registered
2025-12-31
Start date
2026-01-02
Completion date
Unknown
Last updated
2026-01-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Fibromyalgia

Interventions

GABA/Butyrate group:Purified GABA and butyrate in separately bottles respectively (Bottle 1 and Bottle 2). The patients will be instructed to take 1 capsule from Bottle 1 (500mg GABA) and 1 capsule fr
Synbiotics Group:GABA-producing Synbiotics (Bifidobacterium longum ATCC 51870 + Lactobacillus plantarum 299v + 500mg Fructooligosaccharides) and Butyrate-producing Synbiotics (Lactobacillus rhamnosus
Placebo Group:StarCap - a mixture of Pregelatinized Maize starch and maize starch. The patients will be provided with 2 bottles and instructed to take one capsule from each of the bottles twice a day

Sponsors

The Chinese University of Hong Kong
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Patients who are >=18 years old, under care of the pain clinics in the collaborating hospitals; 2. FM has been diagnosed according to the revised 2016 American College of Rheumatology (ACR) Preliminary Diagnostic Criteria for FM, and 3. Able to provide written informed consent and agree to adhere to the trial protocol and follow-up schedule for 12 months, including the 3-monthly follow-up for half a year and a follow-up at 1 year.

Exclusion criteria

Exclusion criteria: 1. Pregnant; 2. Known history of allergic reactions to maize, probiotics or prebiotics; 3. Using prebiotics and/ or probiotics within 15 days before enrolment; 4. Immunocompromised with (a) active chemotherapy or immunotherapy or (b) chronic leukopenia (with cell count < 4x10^9/L) within 3 months of enrolment.

Design outcomes

Primary

MeasureTime frame
average of pain severity score;

Secondary

MeasureTime frame
average of pain severity score;pain interference score;Depression Anxiety Stress Scale;Pittsburgh Sleeping Quality Index;plasma GABA level;fecal GABA level;plasma butyrate level;fecal butyrate level;I-FABP level;bacterial DNA level;16S RNA gene sequencing ;fecal calprotectin ;metagenomic and metabolomic;

Countries

China

Contacts

Public ContactMandy Hiu Man CHU

Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong

hiumanchu@cuhk.edu.hk+852 3505 2375

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026