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Partially Hydrolyzed Guar Gum (PHGG) for Small Intestinal Bacterial Overgrowth (SIBO)

C

Small studies suggest PHGG may reduce SIBO recurrence after rifaximin treatment. Promising adjunctive therapy.

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The Bottom Line

            
            
Small studies suggest PHGG may reduce SIBO recurrence after rifaximin treatment. Promising adjunctive therapy.

            
            
        

    










    

  
Key Study Findings





    

        
        

            

                
                    Review
                
                
                
                
            

            
                Role of PHGG as a dietary fiber: a review article.
            
            

                
                Dose: None
                
                
                vs: None
                
                
                Outcome: Prebiotic and GI benefits of PHGG
                
                
                Effect: None
                
                
                None
                
            

            
            
Population: Patients with GI conditions (IBS, IBD, constipation)

            
        

        
    







    
    

        
        

            

  
Key Statistics





            


    

        
2

        
Studies

    

    

        
100

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        C

        
Grade

    




        


        
        
        

            

  
Referenced Papers





            

                
                

                    

                        
                            Role of PHGG as a dietary fiber: a review article.
                        
                        
                            
                                Review
                            
                            
                            
                        
                    

                    

                        Minerva gastroenterologica e …
                        2013
                        
                    

                

                
            

        

        

        
        
        

            

  
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
                                --
                                
                                    
                                    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 Small Intestinal Bacterial Overgrowth (SIBO)?
            
        
        

            Based on 2 studies with 100 participants, there is limited but promising evidence that Partially Hydrolyzed Guar Gum (PHGG) may support Small Intestinal Bacterial Overgrowth (SIBO) management. Our evidence grade is C (Some Evidence).
        

    

    
    

        
            How much Partially Hydrolyzed Guar Gum (PHGG) should I take for Small Intestinal Bacterial Overgrowth (SIBO)?
            
        
        

            Studies have used various dosages. A commonly studied range is 5-7 g/day. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Partially Hydrolyzed Guar Gum (PHGG)?
            
        
        

            Reported side effects may include Minimal gas and bloating (significantly less than other fibers), Mild abdominal discomfort in rare cases, Loose stools at very high doses. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Partially Hydrolyzed Guar Gum (PHGG) and Small Intestinal Bacterial Overgrowth (SIBO)?
            
        
        

            We rate the evidence as Grade C (Some Evidence). This rating is based on 2 peer-reviewed studies with 100 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                

                    
Other ingredients for Small Intestinal Bacterial Overgrowth (SIBO)

                    

                        
                        
                            Berberine
                            C

                        
                        
                    

                

                

                
                

                    
Partially Hydrolyzed Guar Gum (PHGG) for other conditions

                    

                        
                        
                            Irritable Bowel Syndrome (IBS)
                            B

                        
                        
                    

                

                
            

        

        

    


    
    












    

        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.