Introduction 

Explanation of Irritable Bowel Syndrome 

Irritable bowel syndrome (IBS) represents one of the most commonly diagnosed gastrointestinal diseases. In the absence of any other causative disease, IBS can be defined as the presence of abdominal pain or discomfort with altered bowel habits. It is estimated that between 5% and 10% of people are affected by IBS at some point in time and, in most cases, this condition reoccurs.¹

Importance of gut health in overall well-being 

In the past the importance of gut health was often underestimated. However, today as more studies are being carried out the results and information gained showed us how essential it is to maintain an optimal gut health. It is estimated that there are more trillions of bacteria in the digestive system that are involved in the normal functioning of the brain, immune function, and endocrine pathways.² Hence, gut problems don’t result only in digestive issues but can have severe consequences on the normal activity of the whole organism.

Role of probiotics in managing IBS symptoms 

As probiotics have become a hot topic right now both in the scientific community but also on social media it is fair to ask how effective they actually are to treat IBS associated symptoms. Looking at the current studies a definitive, yes or no answer cannot yet be given regarding their efficacy. However, depending on the number and types of bacteria used, as well as the particular circumstances of the person affected by IBS, probiotics can contribute to alleviating the symptoms.³

What is irritable bowel syndrome and how it can affect your daily life

Definition and symptoms of IBS 

IBS is one of the most common functional gastrointestinal disorders (FGIDs) that is diagnosed as part of general clinical practice. In the absence of an accurate biomarker for the disorder, IBS is mainly diagnosed based on symptomatology using the Rome criteria.⁴ In terms of symptomatology it varies from person to person. The disorder can be debilitating in some patients, while others may have mild or moderate symptoms. The most important risk factors are found to be female sex, younger age and previous gastrointestinal infections. The most common IBS symptoms reported are abdominal pain or discomfort, stool irregularities and bloating, as well as other somatic, visceral and psychiatric comorbidities.⁵

Impact of IBS on daily life 

Depending on how severe the symptoms are, IBS can significantly affect, in some cases, the quality of life of affected individuals. Those suffering from IBS might have to avoid certain activities or have to take more days off the non-affected individuals. Moreover, avoiding certain social interactions and deciding to eat alone to avoid the fear of being judged, along with the gastrointestinal symptoms can also lead to depression, anxiety, and/or panic disorder.⁶

Common triggers of IBS symptoms

The triggers for IBS symptoms can differ as there is not a universal list of triggers that can be avoided to prevent or lessen the symptoms. However, for many people eating or drinking certain foods or beverages can make the symptoms worse. Foods rich in carbohydrates, as well as fatty food, coffee, alcohol and hot spices, were most frequently reported to cause symptoms.⁷ Stress also plays an important role. Most people with IBS experience worse or more frequent symptoms during periods of increased stress.

The gut microbiome: your body's ecosystem 

Gut microbiome and how it influences health

The gut microbiome is a collection of diverse communities of bacteria involved in various vital functions for the overall health of the host. These bacteria contribute to how nutrients are metabolized and they also help your immune system be better equipped to fight against “bad” bacteria.⁸ Thus, considering how many processes these bacteria are involved in, any significant disruption of the gut microbiome is going to have consequences for the normal function of other organs and the overall well-being of an individual.

Importance of maintaining a balanced gut microbiome 

The importance of maintaining a balanced and hence healthy gut microbiome cannot be stressed enough. The gut microbiota deviations have been linked with many diseases including obesity, type 2 diabetes, hepatic steatosis, intestinal bowel diseases (IBDs) and several types of cancer.⁹ Eating habits and environmental factors have been shown to have a critical effect on gut microbiome. This effect can be observed in the increased number of people suffering from IBS in countries where there is high consumption of junk food as well as low-fibre diets.¹⁰

What are probiotics? 

Definition and types of probiotics

Probiotics can be defined as live non-harmful microorganisms that are administered to improve microbial balance, particularly in the gastrointestinal tract. If we were to classify them, two main groups would be Saccharomyces boulardii yeast and lactic acid bacteria ( Lactobacillus and Bifidobacterium species), which can be found as part of dietary supplements or naturally in some foods. Their positive effects occur through a series of mechanisms that they are involved in. The way probiotics work is that they reduce the number of  “bad” bacteria that can survive and grow in the gastrointestinal gut, they can help with lowering the intestinal pH as well as improving the host immune response .¹¹

Sources of probiotics: food vs. supplements 

As mentioned previously there are two main sources of probiotics, natural, from specific types of food, or synthetic, from supplements. A high source of probiotics is represented by fermented foods. Thus, if you want to help your gut you should consider consuming more yoghurt, cheese, and kimchi pickles as well as drinking kombucha or unfiltered apple cider vinegar¹² If fermented foods are not necessarily your cup of tea, you should know that probiotics can be found in some unfermented foods such as cereals, juices and smoothies, and milk. It is also important to mention that the amount of probiotics you can get by consuming these types of foods can vary based on when you eat them and whether or not they survive the intestinal transit.

Evidence-based benefits of probiotics for IBS 

Overview of scientific research on probiotics and IBS 

Research into the effects of probiotics on IBS has shown promising results. Studies have demonstrated the potential of probiotics in alleviating symptoms such as abdominal pain, bloating, and altered bowel habits in individuals with IBS.¹³

Specific probiotic bacteria studied for IBS management 

Several probiotic bacteria have been investigated for their effectiveness in managing IBS symptoms. Among the most studied are Lactobacillus species, Bifidobacterium species, and Saccharomyces boulardii.¹⁴

Results and effectiveness of probiotics in relieving IBS symptoms 

Clinical trials have indicated that probiotics can provide relief from IBS symptoms, particularly in reducing abdominal pain and improving bowel movements. However, the efficacy may vary depending on the specific bacteria used and individual differences.¹⁵

Choosing the right probiotic for IBS 

Factors to consider when selecting a probiotic supplement 

When choosing a probiotic for IBS, factors such as bacteria specificity, dosage, and formulation should be taken into account.¹⁵

Importance of bacteria specificity and dosage

Different probiotic bacteria have varying effects on gut health, so it is crucial to select a bacteria that has been studied for its efficacy in managing IBS. Additionally, ensuring the dosage matches what has been used in clinical trials is important for achieving desired outcomes.¹⁶

Guidance on consulting healthcare professionals for personalised recommendations 

Individuals with IBS should consult healthcare professionals for personalised recommendations on probiotic use, taking into consideration their specific symptoms and medical history .¹⁷

Other lifestyle strategies for managing IBS 

Modifying one's diet by avoiding trigger foods such as certain carbohydrates (FODMAPs), caffeine, and fatty foods can help alleviate IBS symptoms.¹⁸ Practicing stress management techniques such as mindfulness, meditation, and deep breathing exercises can help reduce stress levels, which may in turn improve gut health and alleviate IBS symptoms.¹⁹ Regular exercise and adequate sleep play vital roles in maintaining overall health, including gut health. Engaging in regular physical activity and ensuring sufficient sleep can help manage IBS symptoms.²⁰

Summary 

Probiotics offer a promising avenue for managing IBS symptoms, with research supporting their effectiveness in providing relief from abdominal discomfort and improving bowel habits. By understanding the importance of probiotics and other lifestyle strategies, individuals can take proactive steps to manage their IBS symptoms and improve their quality of life. With ongoing research and a growing understanding of gut health, there is hope for better management and treatment of IBS through holistic approaches that encompass probiotics, dietary modifications, stress management, and lifestyle changes.