Postbiotics and Their Emerging Role in Gut Health 

Postbiotics are substances derived from dead microorganisms and their components that are being investigated for their contribution to health. Postbiotics are distinct from probiotics, which are live microorganisms, while postbiotics are inactivated microorganisms that still have some useful biological effects. 

What Are Postbiotics?

Postbiotics are health-promoting preparations of inactivated microorganisms or their components. In simple terms, these are useful parts of the microorganisms that remain after the microorganisms have died.

The International Scientific Association of Probiotics and Prebiotics (ISAPP) defines postbiotics as “a preparation of inanimate microorganisms and/or their components having a health benefit on the host” (Salminen et al., 2021).

Postbiotics may include microbial cell components and microbial metabolites, products of microbial proteins, peptides, cell wall components and other. Researchers are beginning to explore beyond live probiotics to understand how microorganisms and their products interact with the body.

How Are Postbiotics Different From Probiotics and Prebiotics?

Probiotics, prebiotics and postbiotics are all related to gut health, but they work differently. Probiotics are live beneficial microorganisms, prebiotics are substances that support beneficial microorganisms, and postbiotics are preparations made from inactivated microorganisms or their components that provide a health benefit. Knowing this difference allows you to better understand what each term means when you read about gut health. 

What Are Postbiotic Foods?

Postbiotic foods are foods that contain compounds made by microorganisms during fermentation or foods that contain components associated with microbial activity.

The relevance of fermented foods is particularly because food ingredients can be transformed by microorganisms into many types of compounds during fermentation. Examples are fermented milk products, yoghurt and some traditional fermented food.

However, not all fermented foods can be automatically classified as postbiotic foods. Postbiotics are defined by ISAPP as non-viable microorganisms or their components that provide a health benefit (Salminen et al., 2021).

This is helpful because you will start seeing the word “postbiotic” more and more often on food and supplement products but what a product actually provides is the question.

What Are the Common Postbiotic Food Sources?.

Postbiotic food sources are mainly associated with fermented foods, but there is no single food that provides all postbiotic compounds. The types of compounds produced during fermentation depend on the food, microorganisms involved and fermentation process. This means different fermented foods can contain different microbial compounds and offer different nutritional properties. 

Foods that involve microbial fermentation include:

• Fermented milk products (like yoghurt)
• Kefir (fermented milk beverage)
• Kimchi
• Sauerkraut
• Tempeh
• Some traditional fermented cereal and soy foods.

The research on fermented foods has identified many microbial metabolites and other bioactive compounds that might be responsible for their health benefits (Vera-Santander et al., 2023).

What Are the Benefits of Postbiotics?

Postbiotics may support gut health, digestion, immune function and metabolic health. Their benefits depend on the type of postbiotic and the compounds it contains, so different postbiotics can have different effects on the body. 

Postbiotics and gut health

Your gut has a lot of micro-organisms that interact with the food you eat and your body’s biological systems. Microbial components and metabolites can affect the environment in the digestive tract and may interact with the intestinal cells.

The potential role of postbiotics in supporting intestinal health and maintaining healthy gut function has been studied (Ma et al., 2023).

This is one of the reasons why postbiotics have become a large area of research in the area of nutrition and gastrointestinal health.

Postbiotics and digestion

During fermentation, microorganisms metabolise the constituents of food to produce some postbiotics. These compounds can contribute to the properties of fermented foods and are being studied for their interaction with the digestive system.

A healthy digestive routine, however, requires more than just one type of food or compound. Good everyday digestive health is supported by fibre-rich foods, adequate hydration, regular physical activity and consistent eating habits.

Postbiotics and metabolic health

Gut health is closely linked to metabolism. Metabolic health is determined by food quality, eating patterns, physical activity, sleep and body weight.

Scientists are also exploring the link between metabolic health and postbiotics. Research has explored the interaction of microbial components and metabolites with pathways involved in glucose regulation, inflammation, lipid metabolism and energy balance (Zhong et al., 2024).

This is also where the timing of meals and metabolism comes into the picture. It’s not a question of timing and distribution of meals but an aspect of a larger eating pattern that affects metabolic routines.

Postbiotics and immune health

The gut and the immune system are closely interconnected. Studies have been done to determine if postbiotic preparations can modulate immune pathways and promote healthy immune responses.

The type of microorganism and postbiotic preparation are important as different preparations can have different biological effects. This means postbiotics should be viewed as a broad spectrum of products and not just one product with one universal effect.

Are Postbiotics Related to Weight Management?

Postbiotics are being explored for metabolic processes that may influence body weight, appetite, glucose regulation and energy metabolism. Just because you eat a food that has postbiotic compounds doesn’t mean you will lose weight.

Weight management is a mix of things like what you eat, how you structure your meals, your physical activity, sleep and your routine.

Research on postbiotics and metabolic health is relevant to weight-management, but postbiotics should be considered as one part of a broader healthy lifestyle pattern (Zhong et al., 2024).

Understanding circadian eating can provide useful context for those looking to achieve a healthier weight, as eating patterns are linked to the body’s natural daily rhythm and metabolic processes.

Can Postbiotics Be Found in Fermented Foods?

Fermentation can generate a range of microbial compounds that are being investigated as postbiotic components.

Microorganisms interact with carbohydrates, proteins and other food ingredients during fermentation. This process can yield organic acids, peptides and other substances that contribute to the properties of the fermented food.

The specific compounds will be dependent on the food, the microorganisms and conditions of fermentation. This means that two fermented foods can have very different microbial profiles and biological properties.

So you should think about fermented foods as part of a varied diet and not relying on one food for all the postbiotic benefits.

Postbiotics and Meal Timing

Your gut health is influenced by more than just the foods you eat. It’s also about how you eat. Eating on a regular basis, consuming nutritious food and keeping up daily routine all contribute to your metabolism and digestive health.

This relationship between food timing, gut microbiome and its metabolites is important. Late-night eating studies have also examined the relationship between when you eat and how your body processes food and its impact on sleep and metabolic health.

But that does not mean meal timing will always determine gut health. The bigger picture of patterns of eating, sleep habits, activity levels and food choices is important.

An Ayurvedic Perspective on Gut Health

Ahara or food is considered very important in Ayurveda and how it fits into a person’s daily routine.

According to Ayurveda, digestion is a key factor in maintaining overall good health. Good eating habits, good food choices, good portion sizes and attention to daily routines can help support better digestive habits.

Dinacharya, or a daily routine, also fits well with the modern research on gut and metabolic health. Regular mealtimes, adequate sleep, exercise and conscious food choices can help to establish a stable routine.

This method does not require focusing on one food or nutrient. Instead, it views daily routines as one aspect of a person’s overall health pattern.

“Gut health is closely connected with everyday food and lifestyle habits. Postbiotics are an interesting area of research, but a healthy digestive routine should begin with balanced nutrition, regular meals and habits that can be followed consistently.”

– Dr. Priyadarshini Bhalekar, Zonal Medical Head, Madhavbaug

Postbiotics, Gut and Metabolic Health at Madhavbaug

At Madhavbaug we focus on gut health and metabolic health in the overall health profile of the person. 

It begins with an individual health assessment. This may involve an understanding of body weight, dietary habits, digestion, physical activity, sleep, blood sugar and other relevant health tests and parameters depending on the person’s needs.

The dietary plan can then be built up around the person’s health needs. Looking at food, meal sizes, meal times and daily routines as a whole makes healthy habits.

It includes personalised lifestyle guidance such as Ahara, digestion and Dinacharya based on the Ayurvedic perspective. Ayurvedic therapies like Panchakarma might also be incorporated into a broader doctor-led care plan, where appropriate.

For those with weight or metabolic conditions, the focus can extend beyond digestive comfort to weight management, blood sugar management, physical activity and sustainable lifestyle habits.

The goal is to develop a sustainable routine that can be adopted in everyday life. Book a Health Checkup at your nearest Madhavbaug clinic to understand your digestive, dietary and metabolic health and plan personalised next steps.

Frequently Asked Questions

What are postbiotics?
Postbiotics are preparations made from inactivated microorganisms or their components that provide a health benefit.

What is the difference between probiotics and postbiotics?
Probiotics contain live microorganisms, while postbiotics contain inactivated microorganisms or their components.

What are postbiotic foods?
Postbiotic foods are foods associated with microbial fermentation and the production of microbial compounds, although not every fermented food technically meets the scientific definition of a postbiotic.

What are the best postbiotic food sources?
Fermented foods such as yoghurt, kefir, kimchi, sauerkraut and tempeh are commonly discussed in relation to microbial fermentation and postbiotic compounds.

What are the benefits of postbiotics?
Research is studying postbiotics for their possible roles in gut health, digestion, immune function and metabolic health.

Can postbiotics help with weight loss?
Postbiotics are being studied in relation to metabolic health, but they should not be considered a standalone weight-loss treatment.

Are postbiotics good for gut health?
Certain postbiotic preparations are being studied for their effects on gut health, but their effects depend on the specific microorganism and preparation.

References

Salminen, S., Collado, M.C., Endo, A., Hill, C., Lebeer, S., Quigley, E.M.M., Sanders, M.E., Shamir, R., Swann, J.R., Szajewska, H. and Vinderola, G. (2021). The International Scientific Association of Probiotics and Prebiotics (ISAPP) consensus statement on the definition and scope of postbiotics. Nature Reviews Gastroenterology & Hepatology, 18(9), pp.649–667.

Vinderola, G., Sanders, M.E. and Salminen, S. (2022). The Concept of Postbiotics. Foods, 11(8), p.1077.

Ma, L., Tu, H. and Chen, T. (2023). Postbiotics in Human Health: A Narrative Review. Nutrients, 15(2), p.291.

Vera-Santander, V.E., Hernández-Figueroa, R.H., Jiménez-Munguía, M.T., Mani-López, E. and López-Malo, A. (2023). Health Benefits of Consuming Foods with Bacterial Probiotics, Postbiotics, and Their Metabolites: A Review. Molecules, 28(3), p.1230.

Zhong, Y., et al. (2024). Recent advances and potentiality of postbiotics in the food industry: Composition, inactivation methods, current applications in metabolic syndrome, and future trends. Critical Reviews in Food Science and Nutrition, 64(17), pp.5768–5792.