The MicroByte Series- Lactiplantibacillus plantarum: The Versatile Probiotic with Ancient Roots

Jul 02, 2025

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5 min read

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First identified in 1919, Lactiplantibacillus plantarum is a versatile Gram-positive bacterium capable of supporting a wide array of human health functions. Driven by an advanced metabolic flexibility and a nomadic lifestyle, it effortlessly modulates host immunity, thriving dynamically across diverse environmental niches and gastrointestinal tracts. Benefits range from relieving localized irritable bowel syndrome to improving systemic metabolic, immune, and mental well-being markers. Accurate identification leverages classic core-genome phylogeny and modern tools like 16S rRNA sequencing. While optimization typically requires targeted probiotic supplementation for specialized strains, robust safety relies heavily on cautious antibiotic spacing and strict vulnerability screening.

History and naming

After its first isolation from human saliva in 1919 by Orla-Jensen, who originally named it Streptobacterium plantarum, the organism was placed on the approved lists as Lactobacillus plantarum by Bergey et al. in 1923. The genus Lactobacillus itself was proposed by Beijerinck in 1901 and systematically classified by Orla-Jensen in that same year; mid-20th-century revisions then subdivided species into homo- versus heterofermentative groups. With the advent of molecular tools, 16S rRNA sequencing and core-genome phylogeny, a major taxonomic overhaul in 2020 moved L. plantarum into the newly defined genus Lactiplantibacillus to better reflect its evolutionary relationships. Comparative genomic analyses further reveal that L. plantarum exhibits a “nomadic” lifestyle, lacking strong ecological clustering and thriving across diverse niches from plants and insects to vertebrate gastrointestinal tracts, underscoring its remarkable adaptability.

Genus- A biological classification rank that groups closely related species; it forms the first part of an organism's formal scientific name.

Species- A specific group of closely related living organisms that share distinct common features and a high degree of genetic similarity.

Homo- versus heterofermentative groups- The classification of lactic acid bacteria based on how they process sugars: "homofermentative" groups produce only lactic acid, while "heterofermentative" groups produce lactic acid alongside carbon dioxide, alcohol, or acetic acid.

16S rRNA sequencing- An advanced laboratory method that reads a specific, highly conserved region of bacterial genetic code to precisely identify and classify different microbes.

Phylogeny- The study of the evolutionary history, ancestral development, and family tree relationships among different groups of living organisms.

Ecological Niches and Sources

Lactiplantibacillus plantarum is a highly adaptable and resilient bacterium that thrives in a wide variety of environments, thanks to its impressive metabolic flexibility. It naturally lives in the human body too, showing up in the mouth, gut, and even the vaginal microbiome. This wide range of habitats shows just how versatile L. plantarum really is, each strain adapting uniquely to its environment, making it one of the most diverse and useful bacteria out there.

Health benefits

Lactiplantibacillus plantarum is gaining recognition as a powerful, strain-specific probiotic with wide-ranging health applications. A systematic scoping review of 69 human and animal studies highlights how different strains target specific conditions: L. plantarum 299 relieves IBS symptoms, improves oral health, and lowers inflammation; Lactiplantibacillus plantarum IS-10506 modulates immune responses in atopic dermatitis; L. plantarum LB931 supports vaginal health by limiting pathogenic bacteria; and L. plantarum CCFM8724 helps prevent early childhood cavities. These targeted effects stem from L. plantarum’s ability to interact with host immune and metabolic pathways, influence microbiota composition, and enhance anti-inflammatory cytokines.

Beyond specific strains, L. plantarum as a species supports gut barrier integrity, boosts immunity, and shows promise in lowering cholesterol, managing blood sugar, improving skin conditions like acne and eczema, and even enhancing mental well-being by reducing stress and anxiety. Its antioxidant activity and ability to improve iron absorption add to its clinical appeal. As research deepens, experts emphasize the need for precise strain selection and standardized clinical trials to optimize therapeutic use. With growing evidence, L. plantarum stands out as a multi-functional probiotic with benefits that reach well beyond the gut.

Atopic dermatitis- A chronic, inflammatory skin condition commonly known as eczema that causes dry, red, intensely itchy, and easily irritated patches on the skin.

Pathogenic bacteria- Dangerous, disease-causing bacteria that can successfully invade host tissues and trigger harmful infections or illnesses.

Metabolic pathways- Continuous, step-by-step chemical reaction sequences inside a cell that break down nutrients to create energy or build new cellular materials.

Anti-inflammatory cytokines- Beneficial signaling proteins released by immune cells that act as internal peacemakers, working to calm down swelling and irritation in the body.

Gut barrier integrity- The structural strength and sealing quality of the intestinal lining, which allows vital nutrients into the bloodstream while locking out harmful toxins and bacteria.

Eczema- A chronic inflammatory skin condition that causes the skin to become dry, intensely itchy, red, cracked, and highly prone to infections.

Antioxidant activity- The health-boosting process where specific molecules neutralize highly unstable compounds, keeping them from attacking and harming healthy tissue cells.

Applications

Lactiplantibacillus plantarum is a versatile and resilient bacterium widely used in the food industry and known for its powerful probiotic properties. Its key role in fermentation comes from its ability to convert sugars into lactic acid through glycolysis, a process that not only provides energy to the microbe but also helps preserve food and enhance its flavor. From simple sugars and lactose to complex plant carbohydrates, L. plantarum can ferment a wide variety of substrates, making it essential in both traditional and industrial fermentation.

This microbe is a common starter culture in the production of yogurt, cheese, sourdough bread, kimchi, pickles, sauerkraut, olives, and even sour beers. It improves the flavor, texture, and shelf life of these foods while also producing natural antimicrobial compounds that act as preservatives. Some strains even go a step further, detoxifying food by neutralizing aflatoxins and reducing allergens, and contributing to the creation of functional foods and specialized enzymes.

Recognized by the European Food Safety Authority, L. plantarum is also a well-studied probiotic with benefits that go beyond digestion. It helps restore microbial balance in the gut, boosts the production of short-chain fatty acids, and supports oral, skin, and vaginal health by outcompeting harmful bacteria. Emerging research also links L. plantarum to the gut-brain axis, showing promise in reducing stress, anxiety, and symptoms associated with depression, autism, and neurodegenerative disorders.

Fermentation- A natural biochemical process where friendly microbes break down sugars and carbohydrates into beneficial acids, gases, or alcohol in the absence of oxygen.

Glycolysis- A core metabolic pathway where cells break down glucose (sugar) to extract energy and produce smaller chemical building blocks.

Lactose- A natural, unique sugar found exclusively in milk and dairy products that requires specific digestive enzymes to break down properly.

Antimicrobial compounds- Protective substances manufactured by cells or friendly microbes that directly weaken, stop the growth of, or destroy competing, harmful germs.

Aflatoxins- Highly dangerous, poisonous toxins produced by certain molds that can contaminate crops and cause severe tissue damage or illness if consumed.

Short-chain fatty acids- Beneficial organic acids produced when friendly gut bacteria ferment dietary fiber; they serve as primary fuel for gut cells and help manage body-wide inflammation.

Safety

Lactiplantibacillus plantarum is widely regarded as safe, with GRAS and QPS status. Most people tolerate it well, though mild bloating or gas may occur initially. Rarely, serious infections have been reported in those with weak immunity or heart valve issues. Its benefits depend on the strain and condition, and it may not work for everyone. It should be taken a few hours apart from antibiotics, and is not recommended for those with severe immune or gut issues. Safety checks are needed to avoid risks like antibiotic resistance.

GRAS- "Generally Recognized as Safe," an official U.S. regulatory designation indicating that a food ingredient or microbe is universally accepted as safe for human consumption based on extensive testing and history.

QPS- "Qualified Presumption of Safety," a European regulatory standard used to fast-track safety evaluations for specific microbes based on a proven, long-standing history of safe usage.

Antibiotics- Powerful prescription medications designed specifically to kill dangerous bacteria or stop them from reproducing inside the body.

Taxonomic Classification

Domain: Bacteria

Phylum: Firmicutes

Class:Bacilli

Order:Lactobacillales

Family: Lactobacillaceae

Genus:Lactobacillus

Species: Lactiplantibacillus plantarum

Microbe Profile

Gram nature: Gram +ve

Shape: Short-rod

Spore formation: No

Biofilm formation: Yes

Oxygen requirement: Microaerophilic

Optimal Temperature: 37°C

Optimal pH: 5.6

Food source: Galactose, lactose, maltose, mannitol, raffinose, sucrose

Reference

Duar, R. M., Lin, X. B., Zheng, J., Martino, M. E., Grenier, T., Pérez-Muñoz, M. E., Leulier, F., Gänzle, M., & Walter, J. (2017). Lifestyles in transition: evolution and natural history of the genus Lactobacillus. FEMS microbiology reviews, 41(Supp_1), S27–S48. https://doi.org/10.1093/femsre/fux030

Popova-Krumova, P., Danova, S., Atanasova, N., & Yankov, D. (2024). Lactic Acid Production by Lactiplantibacillus plantarum AC 11S-Kinetics and Modeling. Microorganisms, 12(4), 739. https://doi.org/10.3390/microorganisms12040739

Behera, S. S., Ray, R. C., & Zdolec, N. (2018). Lactobacillus plantarum with Functional Properties: An Approach to Increase Safety and Shelf-Life of Fermented Foods. BioMed research international, 2018, 9361614. https://doi.org/10.1155/2018/9361614

Garcia-Gonzalez, N., Battista, N., Prete, R., & Corsetti, A. (2021). Health-Promoting Role of Lactiplantibacillus plantarum Isolated from Fermented Foods. Microorganisms, 9(2), 349. https://doi.org/10.3390/microorganisms9020349

Yilmaz, B., Bangar, S. P., Echegaray, N., Suri, S., Tomasevic, I., Manuel Lorenzo, J., Melekoglu, E., Rocha, J. M., & Ozogul, F. (2022). The Impacts of Lactiplantibacillus plantarum on the Functional Properties of Fermented Foods: A Review of Current Knowledge. Microorganisms, 10(4), 826. https://doi.org/10.3390/microorganisms10040826

Hao, Y., Li, J., Wang, J., & Chen, Y. (2024). Mechanisms of Health Improvement by Lactiplantibacillus plantarum Based on Animal and Human Trials: A Review. Fermentation, 10(2), 73. https://doi.org/10.3390/fermentation10020073

LACTIPLANTIBACILLUS PLANTARUM

PROBIOTICS

Frequently Asked Questions

Why was the bacterium previously known as Lactobacillus plantarum renamed to Lactiplantibacillus plantarum?

Advanced molecular tools like 16S rRNA sequencing and core-genome phylogeny prompted a major taxonomic overhaul in 2020. This renaming was established to more accurately reflect the bacterium's true evolutionary relationships and history.

What does it mean when researchers describe Lactiplantibacillus plantarum as having a "nomadic" lifestyle?

It means the species lacks a single, restricted ecological home and easily adapts to highly diverse environments. It thrives with equal resilience across plants, insects, food matrices, and vertebrate gastrointestinal tracts.

Are the health benefits of Lactiplantibacillus plantarum universally identical across all of its available forms?

No, its therapeutic benefits are highly strain-specific, meaning distinct genetic variants target completely unique clinical conditions. For instance, strain 299 focuses on easing IBS symptoms, while strain IS-10506 modulates immune responses in eczema.

How does this bacterium naturally preserve fermented foods while simultaneously enhancing their culinary traits?

Through a metabolic pathway called glycolysis, the microbe converts raw sugars into protective lactic acid during fermentation. This process increases acidity to block spoilage while generating natural antimicrobial compounds that boost texture and flavor.

What safety precautions should be taken when consuming this probiotic alongside prescription antibiotics?

To prevent the medication from accidentally destroying the beneficial live bacteria, you should space their consumption a few hours apart. Additionally, individuals who are severely immunocompromised should avoid using this probiotic due to rare systemic infection risks.

BugSpeaks®

BugSpeaks®, developed by Leucine Rich Bio Pvt Ltd, South Asia’s first microbiome company, is headquartered in Bengaluru, India. Since 2014, the company has pioneered advanced analytics to analyze complex genomics data. Collaborating with leading research institutes globally, Leucine Rich Bio has leveraged its expertise to create BugSpeaks®, South Asia’s first gut microbiome test.

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