Partially Hydrolyzed Guar Gum (PHGG) for Irritable Bowel Syndrome (IBS)
BReduces both IBS-C and IBS-D symptoms. Well-tolerated prebiotic that does not cause excess gas. Also shows promise for SIBO-associated symptoms.
The Bottom Line
Reduces both IBS-C and IBS-D symptoms. Well-tolerated prebiotic that does not cause excess gas. Also shows promise for SIBO-associated symptoms.
Key Study Findings
Population: Patients with IBS
Population: Patients with IBD or IBS on drug therapy
Population: Ibs undertook a 90-day intervention and follow-up
Population: None
Population: healthy volunteers
Population: Adults with IBS
Key Statistics
5
Studies
350
Participants
Positive
Grade
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 5-7 g/day
- ibssupport:
- 5 g/day for 4-12 weeks
- siboadjunct:
- 5 g/day alongside antimicrobial therapy
Upper limit: Well-tolerated up to 36 g/day in clinical trials
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| None | 8 weeks | Positive | 47 |
| Partially hydrolyzed guar gum (PHGG) | -- | Positive | -- |
| None | 12.9 weeks | Positive | -- |
| None | -- | Positive | -- |
| None | 13.0 weeks | Mixed | -- |
| partially hydrolyzed guar gum (PHGG) 5g/day | 12 weeks | Positive | -- |
| various probiotic strains | -- | Mixed | -- |
| None | 4.0 weeks | Positive | -- |
Best taken: Mixed into food or beverages; dissolves completely without altering texture
Safety & Side Effects
Reported Side Effects
- ⚠ Minimal gas and bloating (significantly less than other fibers)
- ⚠ Mild abdominal discomfort in rare cases
- ⚠ Loose stools at very high doses
Known Interactions
- ● May slow absorption of some medications (space 1-2 hours)
- ● Diabetes medications (may modestly affect blood glucose)
Tolerable upper intake: Well-tolerated up to 36 g/day in clinical trials
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Partially Hydrolyzed Guar Gum (PHGG) help with Irritable Bowel Syndrome (IBS)?
How much Partially Hydrolyzed Guar Gum (PHGG) should I take for Irritable Bowel Syndrome (IBS)?
Are there side effects of Partially Hydrolyzed Guar Gum (PHGG)?
How strong is the evidence for Partially Hydrolyzed Guar Gum (PHGG) and Irritable Bowel Syndrome (IBS)?
Related Evidence
Other ingredients for Irritable Bowel Syndrome (IBS)
Partially Hydrolyzed Guar Gum (PHGG) for other conditions
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.