Postbiotics

Curious about the newest trend in microbiome research? Postbiotics are making waves with their potential health benefits. Want to know what sets them apart from probiotics and prebiotics? Dive into the science behind this emerging field.

The field of ‘biotic’ research has seen significant advancements over the past few decades, with probiotics and prebiotics becoming common household terms. However, a new player, postbiotics, is emerging and gaining attention for its potential and demonstrated positive physiological effects. Despite their promise, there remains controversy around the multiple definition(s) of the term postbiotics and other related terms, and their differentiation from probiotics and prebiotics.

What exactly are postbiotics? Understand the definition and the complexity behind this bioactive compound, and why it’s becoming an important area of research.

Postbiotics are usually understood as bioactive compounds composed of non-viable microbial ingredients. Unlike probiotics, which are live microorganisms that confer health benefits when consumed in adequate amounts, postbiotics are non-living microbial cells and/or their components, such as cell wall fragments, metabolites, and enzymes. The ambiguity in defining postbiotics stems from the variety of substances that have been classified and interpreted under this term. Some definitions include only non-viable microbial cells and their cell fragments, while others encompass a broader range of microbial-derived substances.

How do postbiotics differ from their well-known counterparts, probiotics and prebiotics? Explore how these three categories are linked, but distinct in their effects on health.

To understand postbiotics, it is essential to distinguish them from probiotics and prebiotics. Probiotics are live microorganisms that, when administered in adequate amounts, confer a health benefit on the host (Hill and all 2014). Common examples include strains of lactobacilli and bifidobacteria but also other bacteria and yeasts. Prebiotics, on the other hand, are “A substrate that is selectively utilized by host microorganisms conferring a health benefit.” (Gibson and all 2017). Although some prebiotics also classify as dietary fibres, not all prebiotics are fibres. Examples of prebiotics include among others inulin, galacto-oligosaccharides, fructo-oligosaccharides, xylo-oligosaccharides, manno-oligosaccharides, and human milk oligosaccharides.

Postbiotics differ from probiotics and prebiotics, in that they are not live microorganisms (like probiotics) nor are they substrates for promoting growth of beneficial endogenous microbes (like prebiotics). Instead, they are the product of microbial metabolism followed by inactivation and/or inactivation and then separation of cell fragments or metabolites, which can exert beneficial physiological effects.

Wondering why postbiotics are creating such a buzz? Learn how they could revolutionize health benefits with their stability and the targeted physiological effects they provide.

The potential advantages of postbiotics are numerous and varied. One of the primary benefits is their stability. Unlike probiotics, which require careful handling and storage to maintain viability, postbiotics are more stable and can withstand a wider range of environmental conditions, including moisture, temperature, and pH variations. This stability generally makes them easier to incorporate into various food products and supplements.

Postbiotics may also offer targeted beneficial physiological effects. Research has shown that they may modulate the immune system, reduce inflammation, and improve gut barrier function. For instance, certain postbiotics have been found to enhance the production of anti-inflammatory cytokines and reduce the levels of pro-inflammatory cytokines, thereby contributing to a balanced immune response. Additionally, postbiotics may improve gut health by strengthening the intestinal barrier, preventing the translocation of harmful bacteria and toxins. Many of these findings are based on preclinical research, and thus there is an urgent need for human intervention studies.

Manufacturing postbiotics comes with unique challenges. Curious about what makes their production so complex? Uncover the hurdles faced by industry.

Despite their potential, the manufacturing of postbiotics presents multiple challenges. Quality control and quality assurance are critical issues. Ensuring the consistency and potency of postbiotic products requires stringent manufacturing processes and thorough testing.

Another challenge is the identification and quantification of bioactive components in postbiotics. Unlike probiotics, where the focus is on the viability and concentration of live microorganisms, postbiotics may require detailed analysis to identify the specific bioactive compounds responsible for their beneficial physiological effects. This necessitates advanced analytical techniques and robust quality control measures.

Interested in how postbiotics are used and regulated? Find out about the current status and the regulatory hurdles they face.

The applications of postbiotics in food and supplements are promising, but it also faces regulatory hurdles due to the lack of consensus on a definition and the variety of the encompassed compounds. Currently, there is little to no standardized regulatory framework for postbiotics in many jurisdictions, which can lead to inconsistencies in product labelling and claims.

Moreover, the safety of postbiotics must be thoroughly evaluated. While they are generally considered safe, especially those derived from well-characterized strains from accepted microbial safe lists, comprehensive safety assessments might be necessary in some cases to rule out any potential adverse effects. This might include evaluating the potential for transfer of antimicrobial resistance, toxicity, and interactions with other dietary components or the manufacturing process of final consumer products.

Postbiotics represent a promising frontier in the field of ‘biotic’ science, offering stability and targeted positive effects that distinguish them from probiotics and prebiotics. However, the uncertainty around the category definition and the various terms (and their respective components) which are encompassed within the entire category, coupled with challenges in manufacturing, quality control, application, and regulation, highlights the need for further research and regulatory guidelines. IPA’s postbiotic committee is currently exploring these aspects, along with the potential advantages of the category and the challenges associated with their manufacturing, application, and regulation. As the scientific community continues to explore the potential of postbiotics, it is essential to address these challenges to fully harness their benefits for human health and provide the consumer with high quality products as postbiotics are already on the market and gain increased interest of consumers.