Lactobacillus rhamnosus GR-1 for Improved Cervical Smear Quality
This conversation explores whether Lactobacillus rhamnosus GR-1 can enhance cervical smear quality over time. Based on a 2019 randomized trial, evidence shows that this probiotic, combined with L. reuteri RC-14, significantly reduced mildly abnormal and unsatisfactory smear rates at 6 months, likely by supporting a healthy vaginal microbiome.
Does Lactobacillus rhamnosus GR-1 help improve the quality of cervical smear results over time?
Yes, research suggests that Lactobacillus rhamnosus GR-1 may help improve the quality of cervical smear results over time.
Evidence Summary
A randomized placebo-controlled trial (2019, n=121) investigated the effects of Lactobacillus rhamnosus GR-1 (along with Lactobacillus reuteri RC-14) on cervical smear quality and HPV clearance1.
Pillser's research database shows 1 study on this topic, with a beneficial effect reported2.
Key Findings
- At 6 months follow-up, both mildly abnormal cervical smear rates and unsatisfactory cervical smear rates had decreased significantly in the probiotic group compared to the control group (p = 0.017 and p = 0.027, respectively)1.
- The daily dose used in the study was one capsule daily of the probiotic combination1.
How It Works
The proposed mechanism is that Lactobacillus rhamnosus GR-1 helps maintain a healthy vaginal microbiota. A balanced vaginal microbiome — dominated by lactobacilli — produces lactic acid and other antimicrobial substances that create an environment less favorable for pathogens and abnormal cellular changes. This may help normalize cervical cytology and reduce inflammation that can interfere with smear quality1.
Footnotes