The name sounds like a graduate school exam question. The bacteria itself is something else entirely.
Lactobacillus plantarum is, in my opinion, among the most remarkable strains in the probiotic world. It has been used in consumer products for over fifty years, carries generally recognized as safe status, and is recognized by the FDA as a legitimate probiotic. That baseline credibility matters in an industry full of products that have neither the history nor the science to back up their claims.
This probiotic was developed and manufactured in Bulgaria during the years I was building Juice Press. When I left in 2019, I sold my interest in it along with everything else. I have no commercial relationship with it today and nothing to gain by recommending it. What I do have is fifteen plus years of direct experience with it, and a clear opinion: it remains the only thing still worth recommending that came out of that company. Make of that what you will.
What makes this strain genuinely interesting is not just what it does in the gut but what it does to food. Lactobacillus plantarum has a natural preservative function. It extends the shelf life of vegetables across Europe without synthetic preservatives, which means it can be added in small amounts to fresh foods like kimchi, guacamole, tahini, soups, and salad dressings, preserving the food while simultaneously delivering the probiotic benefit to whoever eats it. That dual function, preservation and supplementation in the same ingredient, is not a marketing concept. It is a biochemical property of the strain itself, and it has real implications for how we think about functional food.
I have used it as a personal supplement for years and notice a consistent and meaningful difference. That is anecdotal. It is also true.
For the science behind the strain, the following research is worth your time:
GLB18 Center for Applied Studies and Innovation at University of Sofia
GLB44 Paper from Andrew Onderdonk, Professor of Pathology, Harvard Medical School
All statements herein have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.