Golden Rules for Using Probiotics: Insights from Italian Experts

Introduction to Probiotics

Experts in Italy have conducted a thorough evaluation of existing research to develop ten essential guidelines, referred to as “golden rules,” aimed at optimizing the use of probiotics for health enhancement and medical treatment. Probiotics, which are live microorganisms, have gained significant attention in recent years due to various claims regarding their benefits for digestive health, allergic disorders, and diabetes. Given the overwhelming number of available products, the University of Milan’s researchers sought to clarify the best practices for using probiotics. Their findings were published in the Journal of Digestive and Liver Disease.

Understanding Probiotics

The World Health Organization (WHO) defines probiotics as “live microorganisms which, when administered in adequate amounts, confer a health benefit to the host.” These beneficial organisms are commonly found in dietary supplements and fermented foods such as yogurt. The most prevalent bacterial strains in these products include Lactobacillus and Bifidobacterium, along with yeasts like Saccharomyces boulardii and Saccharomyces cerevisiae.

Defining Non-Probiotic Components

It is crucial to differentiate between true probiotics and other microbial components. Non-living bacteria, spores, and certain microbial components may be touted for health benefits, but they do not qualify as probiotics since they lack the ability to replicate and establish colonies in the host gut. As a result, these components require frequent administration to maintain any health advantages.

The Importance of Identifying Bacterial Strains

Accurate identification and tracking of specific microorganism strains are vital, as the health benefits are often linked to particular strains and may not extend to others. Advances in molecular biology and microbiology have improved the identification and characterization of these strains. Manufacturers are encouraged to provide comprehensive information about the colony-forming units (CFUs), recommended daily dosage, detailed strain identities, and assurance against pathogenic factors that could cause illness.

Single-Strain vs. Multi-Strain Products

Probiotic products may contain either a single strain or multiple strains. While some suggest that multi-strain formulations offer enhanced health benefits, evidence indicates that improvements may sometimes be attributed to the dosage rather than any synergistic effect. In certain cases, competing microbial strains may reduce effectiveness. Further research is necessary to determine the clinical efficacy of single versus multi-strain products.

Antibiotic Resistance Considerations

The increasing use of probiotics alongside widespread antibiotic use raises concerns about the potential development of antibiotic resistance genes within probiotic microorganisms. While antibiotic resistance can be advantageous for probiotics to survive in the gut during antibiotic treatment, the transfer of these genes to harmful bacteria poses a risk. It is essential for commercial strains used in food supplements to be evaluated for the absence of transferable antibiotic resistance.

Survival in the Gastrointestinal Environment

The gastrointestinal tract presents a challenging environment for microorganisms, and only those strains capable of withstanding these conditions should be used as probiotics. Such strains must demonstrate resilience to ensure their effectiveness.

Colonization of the Gut

Probiotics exert their beneficial effects primarily through colonization of the gut, which helps inhibit the growth of pathogenic microorganisms. Hence, it is crucial to select strains that have proven their ability to establish colonies in the gut.

Interactions with Normal Gut Flora

Probiotic strains may also positively influence the normal gut microbiota while inhibiting pathogenic microbes. Although research in this area is limited, only products that show a beneficial impact on normal gut flora should be considered.

Safety and Health Considerations

While probiotics are generally considered safe for most individuals, there have been instances where they adversely affected patients with serious gastrointestinal conditions. It is important for products to be screened for pathogenic strains and used cautiously in severely ill patients.

Choosing Clinically Effective Probiotics

Regulatory bodies classify probiotics as food supplements rather than medications, which limits the requirement for rigorous evidence of health benefits by manufacturers. Nonetheless, substantial research supports the positive impacts of probiotics on conditions such as inflammatory bowel disease, atopic dermatitis, and type 2 diabetes. It is vital to select strains with established clinical efficacy for treating specific medical conditions.

Conclusion

Probiotics represent a promising avenue for enhancing health and managing illnesses. However, the lack of regulatory oversight surrounding their production and health claims can create confusion for consumers. The authors advocate for stricter safety controls and scrutiny of health claims, hoping that these ten “golden rules” will guide effective probiotic use.

Reference

Toscano M, Grandi R, Pastorelli L, et al. A consumer’s guide for probiotics: 10 golden rules for a correct use. Digestive and Liver Disease 49(2017) 1177-1184. Doi:10.1016/j.dld.2017.07.011.