A new probiotic bacteria called Blautia coccoides CML164 significantly improved fat metabolism in chickens by reshaping their gut bacteria to produce more acetate, resulting in reduced abdominal fat and better cholesterol levels without slowing growth. According to Gram Research analysis, this 2026 study reveals how specific probiotics can activate metabolic pathways that help the body burn fat more efficiently through gut microbiota changes.
Scientists discovered a new type of helpful bacteria called Blautia coccoides CML164 that can improve how chickens’ bodies handle fat and energy. When researchers added this bacteria to chicken feed, it changed the mix of microbes in the chickens’ guts in a good way, helping them produce more of a healthy substance called acetate. This led to chickens having less belly fat, better cholesterol levels, and stronger energy-burning abilities in their cells—all without slowing down their growth. According to Gram Research analysis, this discovery shows how probiotics can work through the gut to improve metabolism, which could have important applications for animal health and potentially human nutrition.
Key Statistics
A 2026 research article published in Probiotics and Antimicrobial Proteins found that supplementation with Blautia coccoides CML164 significantly increased acetate-producing bacteria in broiler chicken guts while reducing abdominal fat deposition and improving serum lipid profiles.
The probiotic strain enriched beneficial bacteria including Phocaeicola vulgatus, Parabacteroides distasonis, and Prevotellaceae family members while simultaneously upregulating fat-burning genes (PPARα, ACOX1) and suppressing fat-storage genes (SREBP1, PPARγ) in chicken livers.
Research on Blautia coccoides CML164 demonstrated that probiotic-induced metabolic improvements occurred without compromising normal growth performance in broiler chickens, indicating the bacteria enhanced health without trade-offs.
The Quick Take
- What they studied: Whether a new probiotic bacteria could help chickens burn fat more efficiently and improve their overall metabolism through changes in their gut bacteria.
- Who participated: Broiler chickens (the type raised for meat production). The exact number of chickens wasn’t specified in the abstract, but they were divided into groups receiving either the new bacteria or a control diet.
- Key finding: Chickens that received Blautia coccoides CML164 had significantly less abdominal fat, better cholesterol levels, and improved energy metabolism compared to control chickens, while maintaining normal growth rates.
- What it means for you: This research demonstrates how specific probiotics can reshape gut bacteria to improve fat metabolism. While this study focused on chickens, it suggests similar mechanisms might work in humans, though more research is needed before applying these findings to people.
The Research Details
Researchers isolated a new probiotic bacteria called Blautia coccoides CML164 from chicken guts and tested whether adding it to chicken feed would improve how their bodies handle fat and energy. They compared chickens that received this bacteria to chickens on a regular diet, measuring changes in gut bacteria composition, fat storage, cholesterol levels, and how well their cells could burn energy.
The scientists used advanced genetic sequencing to map exactly which bacteria were living in the chickens’ guts before and after the probiotic treatment. They also measured specific molecules in the chickens’ blood and organs to understand how the bacteria were affecting metabolism at a cellular level.
This type of study is valuable because it shows not just that something works, but how it works—by identifying the specific bacteria involved and the biological pathways being activated.
Understanding how probiotics work through the gut microbiome is important because it reveals the mechanism behind health improvements. Rather than just observing that chickens got healthier, this research identified exactly which bacteria increased, which molecules they produced (like acetate), and which genes in the chicken’s body were turned on or off. This mechanistic understanding is crucial for developing better probiotics and potentially applying similar strategies to human health.
This research was published in a peer-reviewed journal focused on probiotics and antimicrobial proteins, indicating it underwent expert review. The study used modern molecular techniques (genetic sequencing) to identify bacteria and measure metabolic changes. However, the sample size was not specified in the abstract, which makes it harder to assess the statistical power of the findings. The research was conducted in a controlled laboratory setting with chickens, so results may not directly translate to other animals or humans without further testing.
What the Results Show
When chickens received Blautia coccoides CML164, their gut bacteria composition changed significantly. Specifically, beneficial bacteria that produce short-chain fatty acids (particularly a substance called acetate) increased in abundance. These bacteria included species like Phocaeicola vulgatus and Parabacteroides distasonis, as well as members of a bacterial family called Prevotellaceae.
The increased acetate production had direct effects on the chickens’ metabolism. Their cells’ energy-producing structures (mitochondria) worked more efficiently, and their livers showed increased activity in genes responsible for burning fat (PPARα and ACOX1 were upregulated). At the same time, genes that normally promote fat storage and creation (SREBP1 and PPARγ) were suppressed or turned down.
These metabolic changes resulted in measurable improvements: chickens had significantly less fat stored in their abdomens, better cholesterol and lipid profiles in their blood, and maintained normal growth rates. This means the probiotic didn’t slow down the chickens’ development while improving their body composition.
The research demonstrated that the probiotic’s benefits weren’t due to a single mechanism but rather a coordinated series of changes. The bacteria produced acetate, which activated specific metabolic pathways in the chicken’s body. This shows that probiotics work by communicating with the host’s cells through the molecules they produce, not just by competing with harmful bacteria. The fact that growth performance wasn’t compromised is particularly important for practical applications, as it shows the probiotic improved health without trade-offs.
This research builds on existing knowledge that probiotics can influence metabolism through the gut microbiome. Previous studies have shown that short-chain fatty acids like acetate play important roles in metabolism, but this study specifically identifies a new bacterial strain capable of producing these beneficial compounds and demonstrates its effects on multiple metabolic pathways simultaneously. The comprehensive approach—measuring both microbial changes and the resulting metabolic effects—represents an advancement in understanding how probiotics work.
The abstract doesn’t specify the exact number of chickens studied, making it difficult to assess whether the sample size was large enough to detect reliable differences. The study was conducted only in chickens, so it’s unclear whether the same bacteria would have identical effects in other animals or humans. The research was performed in controlled laboratory conditions, which may not reflect real-world farm environments where many other factors affect chicken health. Additionally, the long-term effects of continuous probiotic supplementation weren’t discussed, so it’s unknown whether benefits persist over extended periods.
The Bottom Line
Based on this research, Blautia coccoides CML164 appears to be a promising probiotic for improving fat metabolism and reducing fat storage in poultry. However, recommendations for human use would be premature at this stage. The evidence is strong for chickens (high confidence for poultry applications), but moderate confidence for potential human applications pending further research. Anyone considering probiotics for metabolic health should consult healthcare providers, as this specific strain hasn’t been tested in humans.
Poultry farmers and producers should pay attention to this research as it offers a potential tool for improving chicken health and meat quality without compromising growth. Nutritionists and researchers interested in how probiotics affect metabolism should find this work relevant. People interested in metabolic health and probiotics may find the mechanisms interesting, but should not assume this chicken-specific bacteria will work identically in humans. Those with existing health conditions should discuss any probiotic use with their doctors.
In the chicken studies, the metabolic improvements were measurable during the study period, though the exact duration wasn’t specified in the abstract. For practical poultry applications, benefits would likely appear within weeks of supplementation. If similar mechanisms were eventually tested in humans, realistic timelines for seeing metabolic changes would likely be several weeks to months, as gut microbiota changes typically take time to establish and produce measurable effects.
Frequently Asked Questions
Can this probiotic bacteria help humans lose weight or burn fat?
This research was conducted only in chickens, so it’s too early to say whether Blautia coccoides CML164 would have the same effects in humans. The mechanisms identified—increased acetate production and improved fat metabolism—are theoretically relevant to human health, but human studies would be needed to confirm effectiveness and safety.
How does this probiotic bacteria actually improve metabolism?
The bacteria produces acetate, a short-chain fatty acid that activates specific genes in the body responsible for burning fat and suppresses genes that store fat. This shifts the body’s energy balance toward fat burning rather than fat storage, improving overall metabolic efficiency.
What are short-chain fatty acids and why do they matter?
Short-chain fatty acids like acetate are molecules produced when beneficial gut bacteria break down fiber. They’re important because they fuel cells, reduce inflammation, and regulate metabolism. Higher levels of these compounds are associated with better metabolic health.
Is this probiotic available for people to buy?
Blautia coccoides CML164 is a newly identified strain that has only been tested in chickens. It is not currently available as a consumer probiotic supplement. Any commercial availability would require human safety and efficacy testing first.
How long does it take to see benefits from probiotics?
Gut bacteria changes typically take 2-4 weeks to establish, though measurable metabolic effects may take longer. In the chicken study, improvements were observed during the study period, but the exact timeline wasn’t specified. Individual results vary based on diet, health status, and the specific probiotic used.
Want to Apply This Research?
- Users interested in gut health and metabolism could track their probiotic supplementation alongside measurements of energy levels, digestion quality, and body composition changes (weight, waist circumference) on a weekly basis to monitor personal response patterns.
- Users could implement a habit of taking a probiotic supplement at the same time daily while logging their energy levels, digestive comfort, and any changes in how their body feels. The app could send reminders and allow users to correlate probiotic intake with their tracked metabolic markers.
- Establish a baseline of current energy, digestion, and body metrics, then track these weekly for at least 8-12 weeks while using probiotics. Create a simple dashboard showing trends in energy levels, digestive health, and body composition to identify whether the probiotic is having noticeable effects for that individual.
This research was conducted in broiler chickens and has not been tested in humans. The findings about Blautia coccoides CML164 should not be interpreted as recommendations for human use. Anyone considering probiotic supplementation for metabolic health should consult with a healthcare provider, especially those with existing health conditions, taking medications, or with compromised immune systems. This article is for informational purposes only and does not constitute medical advice. Always seek professional medical guidance before starting any new supplement regimen.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.