What is Lactobacillus rhamnosus? High and low values | Lab results explained

Lactobacillus rhamnosus was first isolated in 1983 and is known to have a strong avidity for human intestinal cells and can survive acid and bile environments. It is considered one of the most studied probiotics, with research showing that it could do the following:

– alleviate rotavirus diarrhea in children,

– prevent atopic dermatitis,

– protect against urinary tract infections,

– and improve symptoms of irritable bowel syndrome.

Lactobacillus rhamnosus appears to be safe and effective in prolonging remission in UC patients. LGG has also been studied in CD, but found to be no better than placebo.


Inflammatory Bowel Disease. / Parian, Alyssa M.; Mullin, Gerard E.; Langhorst, Jost; Brown, Amy C., Integrative Medicine: Fourth Edition. Elsevier, 2018.

What does it mean if your Lactobacillus rhamnosus result is too low?

When Lactobacillus and other anaerobic bacteria levels are low, like in IBD patients, the gut loses anti-inflammatory features that exist in healthy individuals and the disease flares up.

Probiotics can help to restore the gut homeostasis. There is a lot of research which shows probiotics, like Bifidobacteria and Lactobacilli, can help control gut inflammation and improve IBD.


Test results may vary depending on your age, gender, health history, the method used for the test, and other things. Your test results may not mean you have a problem. Ask your healthcare provider what your test results mean for you. 

The information on is NOT intended to replace a one-on-one relationship with a qualified health care professional and is not intended as medical advice.

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