Lactobacillus parakefiri

Probiotic

What is it

Lactobacillus parakefiri is a lactic acid bacterium isolated from kefir grains. It is one of the characteristic species of kefir microbiota and is studied for probiotic potential.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Probiotic / gut health

Mixed Evidence

Limited specific clinical evidence; whole kefir consumption is better studied.

How it works

L. parakefiri ferments lactose and other sugars to lactic acid and contributes to kefir's flavor and biochemical profile. Like other lactobacilli, it produces exopolysaccharides (such as kefiran) and may modulate gut microbiota balance. Direct clinical evidence specific to L. parakefiri as an isolated supplement is limited; most evidence relates to whole kefir or mixed Lactobacillus blends.

Dosage

No established RDA. Probiotic doses commonly 1-10 billion CFU per day.

When and how to take it

Taken with or just before meals.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Probiotic capsule

Less common single-strain product.

Variable colonization.

Safety

Generally regarded as safe. Theoretical risk of bacteremia in severely immunocompromised individuals.

Who should be cautious

Caution in severe immunosuppression and central venous catheter use.

Interactions

May interact with antibiotics (reduces probiotic viability). Separate dosing by 2-4 hours.

Food sources

Kefir

Amount
1 cup
%DV
—

Frequently asked questions

Is L. parakefiri the same as L. kefiri?⌄

They are closely related species both found in kefir grains.

Should I take it as a single-strain supplement?⌄

Mixed probiotic blends or whole kefir are more practical sources.

References

Lactobacillus parakefiri on Wikidata — Wikidata link

Lactobacillus parakefiri on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Lactobacillus parakefiri (PubMed search) — PubMed link

Track Lactobacillus parakefiri with Pilora

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.