A beneficial bacteria called Lactobacillus plantarum 58, isolated from vinegar dregs, significantly lowered cholesterol and triglycerides in animal studies by activating fat-burning genes while suppressing fat-making genes. According to Gram Research analysis, fish receiving this bacteria showed reduced blood cholesterol and less liver fat accumulation even when eating high-fat diets, with the bacteria also reshaping gut microbiota composition toward more beneficial species.
Researchers discovered that a specific type of helpful bacteria called Lactobacillus plantarum 58, found in vinegar dregs, can significantly lower cholesterol and fat levels in the blood. When this bacteria was added to the diet of fish eating high-fat food, it reduced triglycerides and total cholesterol while also preventing fat from building up in the liver. The bacteria works by turning on genes that break down fat and turning off genes that create fat. This study suggests that this natural bacteria might be a promising way to help manage cholesterol and metabolic health, though more research in humans is needed.
Key Statistics
A 2026 research article found that Lactobacillus plantarum 58 from vinegar dregs reduced serum triglycerides and total cholesterol in hybrid grouper fish regardless of whether they consumed normal or high-fat diets.
The bacteria activated four fat-burning genes (ATGL, CPT-1, FXR, and LPL) while simultaneously suppressing two fat-making genes (FAS and SCD-1) in the livers of fish consuming high-fat diets.
Fish receiving Lactobacillus plantarum 58 showed markedly reduced hepatic fat vacuolation and lipid-droplet accumulation compared to control groups, indicating significant liver protection against fatty infiltration.
The probiotic bacteria caused a pronounced shift in gut microbiota composition, increasing beneficial bacteria including Bacteroides, Faecalibacterium, and Lachnospiraceae species, along with a surge in Lactobacillus abundance.
The Quick Take
- What they studied: Whether a specific probiotic bacteria from vinegar could lower cholesterol and fat levels in animals eating high-fat diets
- Who participated: Hybrid grouper fish (a type of farmed fish) divided into four groups eating different diets: normal fat, high fat, normal fat with bacteria, and high fat with bacteria
- Key finding: Fish that received the special bacteria had significantly lower triglycerides and cholesterol in their blood, plus less fat buildup in their livers, even when eating high-fat diets
- What it means for you: This research suggests probiotics from natural sources like vinegar might help manage cholesterol and fat metabolism, though human studies are still needed to confirm these benefits apply to people
The Research Details
Scientists isolated a beneficial bacteria strain called Lactobacillus plantarum 58 from vinegar dregs and added it to fish feed at a specific concentration. They created four different diet groups: one with normal fat content, one with high fat, one with normal fat plus the bacteria, and one with high fat plus the bacteria. This setup allowed them to test whether the bacteria could help even when animals ate unhealthy high-fat diets.
The researchers measured multiple outcomes over the study period. They tested blood samples to check cholesterol and triglyceride levels, examined liver tissue under a microscope to see fat accumulation, and analyzed the bacteria living in the fish’s digestive system. They also used advanced genetic testing to see which genes were turned on or off in the liver, and identified beneficial compounds in the intestines.
This research approach is important because it tests whether a natural, food-derived bacteria can work as a functional food ingredient to prevent metabolic problems. Rather than just looking at one outcome, the researchers examined multiple biological systems—blood markers, liver health, gut bacteria composition, and gene expression—to understand exactly how the bacteria helps. This comprehensive approach provides stronger evidence for how the bacteria actually works in the body.
The study used a controlled experimental design with multiple comparison groups, which strengthens the reliability of findings. The researchers used multiple measurement methods (blood tests, tissue examination, genetic analysis, and metabolite profiling) to confirm results from different angles. However, this research was conducted in fish, not humans, so results may not directly apply to people. The study was published in a peer-reviewed journal, indicating it met scientific standards for publication.
What the Results Show
The most striking result was that fish receiving the special bacteria had significantly lower cholesterol and triglycerides in their blood compared to fish without the bacteria, regardless of whether they ate normal or high-fat diets. When researchers examined the livers under a microscope, they found that fish getting the bacteria had much less fat accumulation and fewer fat droplets forming in liver cells.
Genetic testing revealed how the bacteria accomplished this: it activated genes responsible for breaking down and burning fat (including ATGL, CPT-1, FXR, and LPL) while simultaneously suppressing genes that create new fat (FAS and SCD-1). This dual action—burning more fat while making less—explains why the bacteria was so effective.
The bacteria also dramatically changed the composition of microbes living in the fish’s digestive system. The proportion of beneficial bacteria increased, particularly Bacteroides, Faecalibacterium, and Lachnospiraceae species, along with a surge in Lactobacillus bacteria themselves. These changes in the microbial community appear to support the fat-lowering effects.
Beyond the main cholesterol-lowering effects, researchers discovered that fish receiving the bacteria had higher levels of beneficial fatty acids in their intestines, specifically linoleic acid and alpha-linolenic acid. These are essential fatty acids that the body cannot make on its own and must obtain from food. The presence of these beneficial compounds suggests the bacteria may improve overall metabolic health beyond just lowering cholesterol.
This research builds on existing knowledge that certain probiotic bacteria can influence cholesterol metabolism and gut health. Previous studies have shown that Lactobacillus species can help manage lipid levels, but this study is notable for isolating a specific strain from a traditional food source (vinegar dregs) and demonstrating its effectiveness even under challenging high-fat diet conditions. The comprehensive analysis of how the bacteria changes gene expression and microbial communities provides more detailed mechanistic understanding than many previous studies.
The most important limitation is that this study was conducted in fish, not humans. Fish metabolism differs from human metabolism in important ways, so these results cannot be directly applied to people without human clinical trials. The study did not specify the exact number of fish used in each group, making it difficult to assess statistical power. Additionally, the research was conducted in a controlled laboratory setting with specific diet formulations, which may not reflect real-world conditions. Finally, while the study measured short-term effects, it did not assess whether benefits persist over longer periods or whether the bacteria remains effective with continued use.
The Bottom Line
Based on this research, Lactobacillus plantarum 58 shows promise as a potential probiotic supplement for cholesterol management, but confidence in human applications is currently moderate. The evidence is strong in the animal model tested, but human clinical trials are needed before making definitive recommendations. People interested in cholesterol management should continue following established medical advice from their healthcare providers, which typically includes diet, exercise, and when necessary, prescribed medications.
This research is most relevant to people concerned about cholesterol levels, metabolic health, and those interested in natural approaches to health management. It may be particularly interesting to those who prefer food-derived probiotics over synthetic supplements. However, people with existing cholesterol problems should not replace prescribed medications with probiotics based on this research alone. Those with compromised immune systems should consult healthcare providers before trying new probiotics.
In the animal study, the beneficial effects on cholesterol and liver health were measurable within the study period, suggesting relatively quick action. However, realistic timelines for human benefits cannot be determined from this fish study. If similar bacteria were tested in humans, benefits would likely take weeks to months to become apparent, similar to other probiotic interventions.
Frequently Asked Questions
Can probiotics from vinegar actually lower cholesterol?
Research shows Lactobacillus plantarum 58 from vinegar dregs reduced cholesterol and triglycerides in animal studies by activating fat-burning genes. However, human studies are needed to confirm these benefits apply to people. Consult your doctor before relying on probiotics instead of prescribed cholesterol medications.
How does this bacteria change your gut microbiota?
The bacteria increases beneficial species like Bacteroides and Faecalibacterium while boosting Lactobacillus populations. This shift toward more beneficial microbes may support metabolic health and fat breakdown, though the exact mechanisms in humans require further research.
Is this bacteria safe for humans to consume?
Lactobacillus plantarum is generally recognized as safe and commonly found in fermented foods. However, this specific strain (58) was only tested in fish. People with weakened immune systems should consult healthcare providers before trying new probiotics.
How long does it take to see cholesterol benefits from probiotics?
This animal study showed measurable effects within the study period, but human timelines are unknown. If similar bacteria were tested in people, benefits would likely require weeks to months of consistent use combined with dietary improvements.
Can I use this instead of cholesterol medication?
No. This research was conducted in fish, not humans, and shows only preliminary promise. Continue taking prescribed cholesterol medications as directed by your doctor. Discuss any probiotic supplements with your healthcare provider before adding them to your routine.
Want to Apply This Research?
- Track weekly cholesterol and triglyceride levels (if you have access to testing) or monthly blood work results. Also monitor digestive health markers like bloating, regularity, and energy levels, which may correlate with beneficial gut bacteria changes.
- If you try a probiotic supplement containing similar Lactobacillus strains, pair it with consistent dietary changes—reducing saturated fat intake and increasing fiber—to maximize potential benefits. Log your supplement intake daily and note any changes in energy, digestion, or how you feel.
- Establish a baseline cholesterol level through your doctor, then retest after 8-12 weeks of consistent probiotic use combined with dietary improvements. Track subjective markers like energy levels, digestive comfort, and bloating in your app daily. Note any changes in blood work trends over time rather than expecting dramatic single-test improvements.
This research was conducted in fish, not humans, and results cannot be directly applied to people without human clinical trials. This article is for educational purposes only and should not replace professional medical advice. Anyone with high cholesterol or metabolic concerns should consult their healthcare provider before making dietary changes or starting supplements. Do not discontinue prescribed cholesterol medications based on this research. Probiotic supplements are not regulated the same way as medications, and effectiveness varies by product and individual. People with compromised immune systems should consult healthcare providers before consuming new probiotic products.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.