Quality Rating

Giardia Infection

Saccharomyces cerevisiae boulardii (Biocodex strain)


  • Giardia
  • Antibiotic Recovery:
    • Reduced antibiotic diarrhea after 1 week of use
    • Reduced negative microbiome changes
    • Reduced antibiotic symptoms

United States Supplements: 

Research: Decreased Stool Frequency, Improvements in jejunum ⭐⭐⭐⭐

In children suffering from chronic diarrhea after a Giardia infection, use of the biocodex strain resulted in a 65% decrease in stool frequency compared to only 15% in the placebo group. A histological improvement in the mucosa of the jejunum was also seen (70% improvement compared to 10% in the placebo group).

Link to Research: https://pubmed.ncbi.nlm.nih.gov/16798698/


Lactobacillus rhamnosus GG 


  • Giardia
    • Reduced Duration of Infection
    • Reduced Giardia cysts

United States Supplements: 

  • Culturelle

Research: Decreased duration of infection, decreased Giardia ⭐⭐

Taking the LGG strain prior to infection and after Giardia significantly reduced Giardia cysts and decreased amounts in the small intestine. The LGG strain also shortened the duration of infection from 25 to 13 days. 

Link to Research: https://pubmed.ncbi.nlm.nih.gov/21760784/