Oxalobacter formigenes


A healthy result should fall into the range 0 - 1.5 CFU/g stool.

Oxalobacter formigenes is a bacterium that colonizes the colon of a substantial proportion of the normal population and metabolizes dietary and endogenous oxalate and hence reducing the incidence of kidney stones.

More about kidney stones:

Kidney stones are hard deposits made of minerals and salts that form inside your kidneys. Kidney stones are common, affecting 1 in 11 people in the United States. The most common form of the condition is the calcium oxalate stone. Current treatments include dietary modification, medications, and surgical treatment. Dietary modifications include increasing fluids, increasing dietary calcium, and decreasing oxalate in the diet (e.g. spinach, rhubarb, potatoes, nuts), and avoiding high dose Vitamin C. Medications may be used to reduce calcium in the urine or to reduce uric acid levels.

Oxalate degradation by Oxalobacter formigenes is important for human health, helping to prevent hyperoxaluria and disorders such as the development of kidney stones.

Some antibiotics affect colonization with Oxalobacter formigenes

Oxalate degradation by the anaerobic bacterium Oxalobacter formigenes is important for human health, helping to prevent hyperoxaluria and disorders such as the development of kidney stones.

-O. formigenes may be beneficial to host thyroid function by lowering circulating oxalate.


  1. http://www.urologystone.com/CH18WhatsNew/2001AUA.html
  2. https://www.ncbi.nlm.nih.gov/pubmed/24857648
  3. https://www.ncbi.nlm.nih.gov/pubmed/23536130
  4. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3071521/
  5. https://aem.asm.org/content/68/8/3841
  6. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6151321/
  7. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5571629/ 
  8. https://www.ncbi.nlm.nih.gov/pubmed/12147479/
  9. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3362665/
  10. https://link.springer.com/article/10.1007%2Fs00203-016-1272-y
  11. https://jasn.asnjournals.org/content/19/6/1197.long
  12. https://www.tandfonline.com/doi/abs/10.3109/00365528009181482?journalCode=igas20 

Oxalobacter formigenes result calculator

insert the value from you Oxalobacter formigenes test result.

What does it mean if your Oxalobacter formigenes result is too low?

Studies suggest that the gut microbiome may play a role in calcium stone formation, and may therefore present a novel treatment approach. A low level of Oxalobacter formigenes has been identified as a risk factor for calcium oxalate stone formation.

O. formigenes breaks down oxalates in the gut, and if O. formigenes levels are low, oxalate levels can accumulate in the kidneys and potentially form calcium oxalate stones. The presence of O. formigenes is associated with a 70% reduction in the risk of recurrent kidney stones .

-Diminished O. formigenes colonization in the gut of urinary stone forming subjects was associated with reduced bone mineral density.

-Males carry O. formigenes at significantly lower abundance than females. This correlates with the higher kidney stone incidence in males compared to females.

Treatment options:

  • A low oxalate diet: A diet low in oxalate is suggested to reduce urinary oxalate formation. Foods high in oxalate include: spinach, nuts/nut butters, beets, potatoes, rhubarb. Research suggests that dietary oxalate consumption must be reduced to 80 - 100 mg/day in order to be effective.
  • Avoid calcium in supplement form: Calcium supplementation has been found to increase kidney stone risk. However, normal calcium intake through dietary sources did not, as this can help bind oxalates in the digestive tract.
  • Recommend a low-fat diet: A low-fat diet is suggested to help limit the effects of bile acids on oxalate absorption in the colon.
  • Avoid antibiotics to which O. formigenes is known to be sensitive, including: Azithromycin, Ciprofloxacin, Clarithromycin, Clindamycin, Doxycycline, , Gentamicin, Levofloxacin, Metronidazole, Tetracycline.
  • Check bone density: Diminished O. formigenes colonization in the gut of urinary stone forming subjects was associated with reduced bone mineral density.

Upload Full Test and Learn More

Sign Up, Upload Tests, Get Insights and Improve with HealthMatters.io.

Sign up now

Are you concerned about your lab test results?
Upload your lab report and get instant interpretation on your results.

DIY Health One

One Lab Report Interpretation

  • One lab report interpretation
  • Use self upload form
  • 800+ biomarkers explained
  • Recommendations
  • Pay per additional interpretations
  • Report uploading support*

15 $

Analyze and Interprete Now

*Additional costs may apply

DIY Health Track

Unlimited Lab Report Interpretations

  • Unlimited lab report interpretations
  • Use self upload form
  • 800+ biomarkers explained
  • Recommendations
  • Online support
  • We do the uploading for you*

59 $/year

Analyze and Interprete Now

*4 report uploads by our team are included per year

Your Privacy And Security

At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put security measures in place to help protect against the loss, misuse or alteration of information under our control. We use procedural, physical and electronic security methods designed to prevent people who aren't authorized from getting access to this information. Our internal code of conduct adds additional privacy protection. See our Privacy Policy for more information.