Observational study finds mature British cheeses may support gut health through bacterial composition — Evidence Review
Published in ACS Food Science & Technology, by researchers from University of Reading, Nettlebed Creamery
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Table of Contents
Scientists tracking the maturation of three British artisan cheeses found that their unique bacterial communities not only shape flavor but may also offer gut health benefits. Related research generally supports these findings, highlighting the probiotic potential of cheese microbes and the low lactose content of mature cheeses, as reported in ACS Food Science & Technology.
- Multiple studies confirm that bacteria found in fermented dairy products, including artisan cheeses, can survive the digestive process and exert beneficial effects on gut health by promoting microbial balance and supporting immune function 2 3 4 5.
- The near-complete absence of lactose in mature cheeses aligns with broader evidence that well-aged cheeses are suitable for lactose-intolerant individuals, as residual lactose is typically undetectable after ripening 6 8 9.
- The identification of specific probiotic and prebiotic components in cheese, such as live lactic acid bacteria and chitin from cheese rinds, expands upon recent findings that fermented dairy foods may modulate gut microbiota and confer diverse health benefits 2 4 5 13 14.
Study Overview and Key Findings
Understanding the microbial makeup of artisan cheeses is increasingly relevant as consumers and researchers alike explore the links between fermented foods, gut health, and functional nutrition. This study, conducted by researchers at the University of Reading in collaboration with a local creamery, addresses a gap in knowledge about the specific bacteria present in British artisan cheeses and their potential human health implications. The research is timely given rising interest in both traditional food production and the health-promoting properties of fermented foods. Notably, the study also considers the role of cheese matrix and rind as vehicles for delivering beneficial microbes, and provides detailed insights into the dynamic changes in bacterial populations during cheese maturation.
| Property | Value |
|---|---|
| Organization | University of Reading, Nettlebed Creamery |
| Journal Name | ACS Food Science & Technology |
| Authors | Sabrina Longley |
| Population | Three varieties of British artisan cheeses |
| Methods | Observational Study |
| Outcome | Bacterial communities and chemical composition changes |
| Results | Mature cheeses contained almost no lactose. |
Literature Review: Related Studies
To provide context for these findings, we searched the Consensus database, which contains over 200 million research papers. The following search queries were used to identify relevant studies:
- cheese bacteria gut health benefits
- lactose content mature cheeses
- fermented dairy gut microbiome effects
Below is a summary of related research, grouped by key topics:
| Topic | Key Findings |
|---|---|
| How do cheese bacteria influence gut health and inflammation? | - Cheese-derived lactic acid bacteria (LAB), including Lactobacillus and Streptococcus, can survive passage through the digestive tract, adhere to gut cells, and help modulate immune responses and reduce inflammation 1 2 3 4 5 14. - Cheese and other fermented dairy products may positively alter gut microbiota composition, increasing beneficial bacteria and improving gut barrier integrity 2 3 5 11 12 13 14. |
| What is the lactose content of mature cheeses, and how does it impact tolerance? | - Well-aged cheeses typically contain little to no lactose, making them suitable for lactose-intolerant individuals 6 8 9. - Modifying lactose content during cheesemaking influences flavor and texture but does not significantly affect the overall probiotic potential 6 7 10. |
| What are the mechanisms by which fermented dairy products affect the microbiome? | - The food matrix of cheese and other fermented dairy products helps protect probiotic bacteria, enhancing their survival through the gastrointestinal tract and increasing their efficacy 2 5 14. - Fermented dairy bacteria and their metabolites (such as short-chain fatty acids and bioactive peptides) contribute to immune modulation and improved metabolic health 2 4 5 12 13 14. |
| Are there specific compounds in cheese rinds or matrices with prebiotic effects? | - Mold-ripened cheese rinds may contain fibers like chitin that can act as prebiotics, providing substrates for beneficial gut microbes 5. - The diversity of microbial species increases during cheese maturation, potentially enhancing both probiotic and prebiotic effects 5 14. |
How do cheese bacteria influence gut health and inflammation?
Several related studies support the idea that bacteria commonly found in cheese, particularly lactic acid bacteria, can have beneficial effects on the gut. These microbes can modulate the gut microbiota, reduce inflammation, and help maintain the integrity of the intestinal barrier. The new study's identification of Streptococcus thermophilus and Lactococcus lactis as dominant and persistent bacteria in artisan cheeses aligns with these findings, reinforcing the potential role of cheese as a functional food.
- Multiple studies report that cheese-derived LAB, like Lactobacillus brevis and Streptococcus thermophilus, can survive gastrointestinal transit and adhere to gut epithelial cells 1 2 3 5 14.
- These bacteria can modulate immune responses, reduce pro-inflammatory markers, and strengthen gut barrier function by upregulating tight junction proteins 1 2 4 5.
- Fermented dairy consumption is linked to increased abundance of beneficial genera such as Lactobacillus and Bifidobacterium in the human gut 2 3 11 12 13 14.
- Cheese and other fermented dairy products may help reduce symptoms of inflammatory and metabolic disorders by promoting a healthier gut environment 5 13 14.
What is the lactose content of mature cheeses, and how does it impact tolerance?
The finding that mature artisan cheeses are nearly lactose-free is well-supported in the literature. Studies using enzymatic assays confirm that many aged cheeses, including Cheddar and Parmesan, contain undetectable levels of lactose after maturation. This has practical implications for individuals with lactose intolerance and for dietary management of metabolic disorders.
- Analytical studies show that Gruyere, Emmental, Parmigiano Reggiano, and mature Cheddar typically have lactose contents below detection limits after full ripening 8 9.
- The absence of lactose in mature cheeses results from fermentation by lactic acid bacteria, which consume almost all available lactose during the aging process 6 7 10.
- Cheese texture and flavor are influenced by lactose content and fermentation parameters, but probiotic potential remains high in both low- and high-lactose cheeses 6 7 10.
- These findings support the inclusion of specific mature cheeses in lactose-restricted diets, such as for galactosaemia 8.
What are the mechanisms by which fermented dairy products affect the microbiome?
Researchers have identified several mechanisms by which cheese and other fermented dairy products impact the gut microbiome. The protective food matrix in cheese enhances probiotic survival, while fermentation-derived metabolites like short-chain fatty acids and bioactive peptides contribute to immune modulation and metabolic benefits.
- The cheese matrix buffers probiotic bacteria against stomach acid and bile, increasing their chances of reaching the gut alive 2 5 14.
- Fermentation produces compounds such as propionic acid, which can have anti-inflammatory and appetite-regulating effects 5.
- Bioactive peptides and other metabolites from dairy fermentation can improve metabolic parameters and reduce systemic inflammation 4 5 12 13.
- Clinical studies have observed improved gut homeostasis and reduced symptoms in conditions like irritable bowel syndrome after consumption of fermented milk products 12 13.
Are there specific compounds in cheese rinds or matrices with prebiotic effects?
The new study highlights the potential prebiotic role of chitin in the rind of white mold cheeses, an area that has received less attention in prior research. The increase in microbial diversity during hay-aging, as observed in the artisan cheese study, may further enhance the prebiotic and probiotic potential of mature cheeses.
- Some cheese rinds, particularly those formed by Penicillium candidum, contain chitin, a fiber that may act as a prebiotic by nourishing beneficial gut microbes 5.
- The maturation process, particularly in cheeses aged with hay or under unique conditions, substantially increases microbial diversity, which can enhance both flavor complexity and potential health benefits 5 14.
- Prebiotics from cheese rinds could work synergistically with probiotic bacteria to support gut health, though more research is needed to confirm these effects in vivo 5 14.
- The combination of diverse microbial populations and prebiotic components in artisan cheeses represents a promising area for future functional food research 5 14.
Future Research Questions
While the current study and related literature provide valuable insights, several key questions remain unanswered. Future research is needed to clarify the health effects of specific cheese-derived microbes and prebiotics in humans, the durability of these effects, and the optimal conditions for maximizing functional benefits in cheese.
| Research Question | Relevance |
|---|---|
| What are the effects of consuming specific cheese-derived probiotic strains on human gut microbiota composition and health outcomes? | Direct evidence from human trials is limited, and intervention studies are needed to determine if the beneficial bacteria identified in cheese can colonize the gut and confer measurable health effects 2 5 11. |
| How do cheese matrix and rind components (such as chitin) influence the delivery and activity of probiotic and prebiotic agents? | The protective effect of the cheese matrix and the prebiotic potential of rinds like those from Penicillium candidum warrant further study to understand their roles in supporting beneficial gut microbes 2 5 14. |
| Can regular consumption of matured artisan cheeses improve markers of metabolic and immune health in humans? | Observational and experimental studies suggest possible benefits, but well-designed clinical trials are needed to confirm effects on metabolic and immune parameters in diverse populations 4 5 13 14. |
| What are the long-term effects of fermented cheese consumption on the gut microbiome and host health? | Most studies assess short-term outcomes; long-term, adaptive trials are necessary to determine the durability and safety of cheese-derived microbiota modulation 5 11 12. |
| How do different cheesemaking practices and aging conditions affect the probiotic and prebiotic content of cheese? | The diversity and abundance of beneficial bacteria and prebiotics vary with production methods and aging; comparative studies could guide industry practices for maximizing health benefits 5 6 7 10 14. |