Research review
Does acidophilus help with kidney disease? What the research does and doesn't show
The evidence doesn't support acidophilus as something that treats kidney disease in people. The research that exists is two mouse studies of one named strain, not a human trial.
The evidence doesn't support acidophilus as a treatment for kidney disease in people — we didn't find a human trial testing it. The research that exists is two mouse studies of one specific named strain, showing kidney protection in an animal model of chronic kidney disease, which is a different thing from a trial in people.
What the evidence doesn't support
This page addresses kidney disease, which is what the search behind it is actually asking about — we found no trial, human or animal, testing Lactobacillus acidophilus specifically against liver disease or liver enzyme markers, so that isn't covered here. On kidney disease: the evidence doesn't support acidophilus as a treatment, in any form, for chronic kidney disease or any other kidney condition in people. No human trial of acidophilus and kidney disease exists that we found. The two studies that do exist were done in mice, using one specific strain (KBL409, not a strain found in a general "acidophilus" label), and animal results don't establish what happens in a person.
What the trials found
Two related mouse studies, from the same research group, tested the L. acidophilus strain KBL409 in mice with adenine-diet-induced chronic kidney disease, a standard animal model for the condition. In the first, mice received KBL409 daily by oral gavage; markers of mitochondrial energy metabolism that are typically disrupted in chronic kidney disease were evaluated, and the study aimed to test whether the strain could protect mitochondrial function in kidney tissue. In the second, mice received KBL409 daily for 4 weeks and showed reduced kidney fibrosis compared with untreated CKD mice, an effect the researchers attributed to immune-modulating activity of the strain. Both studies used mice, not people, and both tested one specific named strain rather than acidophilus as a species.
We found no human trial of any acidophilus strain against a kidney disease outcome or marker. Mouse studies like these are typically an early step that may or may not lead to human trials, and a positive result in mice doesn't establish that the same strain, at a translatable dose, would do anything in a person with kidney disease.
Questions people ask
Does acidophilus help kidney disease?
No human trial has tested that. Two mouse studies found a specific strain (KBL409) protected kidney tissue in an animal model of chronic kidney disease — that's animal evidence, not a finding about people.
Is acidophilus safe for people with kidney disease?
That's a question for your doctor, not something this page can answer generally. Kidney disease and any immune-related complications it involves change the risk profile for probiotics; see the next section.
Does acidophilus help the liver?
We didn't find a trial, human or animal, testing Lactobacillus acidophilus against liver disease or liver enzyme markers specifically, so there's no research to report on that question here.
When to talk to a doctor
Kidney disease requires monitoring and treatment from a doctor, and acidophilus is not a treatment for it. People with reduced kidney function are also more likely to have other risk factors — being immunocompromised, or having a central line or a history of certain procedures — that are linked, in case reports, to rare but serious Lactobacillus bloodstream or heart-valve infections. If you have kidney disease, ask a doctor before starting any probiotic supplement.
Related reading: who should not take acidophilus and acidophilus side effects.
Sources
- Lactobacillus acidophilus KBL409 protects against kidney injury via improving mitochondrial function with chronic kidney disease A mouse study found a specific acidophilus strain, KBL409, was tested for protective effects on kidney mitochondrial function in a diet-induced chronic kidney disease model — this is animal data, not a human trial, and used one specific named strain.
- Lactobacillus acidophilus KBL409 Reduces Kidney Fibrosis via Immune Modulatory Effects in Mice with Chronic Kidney Disease A second mouse study, from the same strain (KBL409), found reduced kidney fibrosis in a chronic kidney disease model after 4 weeks of daily dosing — again animal data, not a human trial.
- Lactobacilli Infection Case Reports in the Last Three Years and Safety Implications A 2022 survey of case reports found L. acidophilus among the Lactobacillus species occasionally linked to rare, serious bloodstream or heart-valve infections, almost always in people who were diabetic, immunocompromised, or had another risk factor like a prosthetic heart valve.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.