Probiotics: gastric health risks in certain patients

The mechanisms of action of probiotics on gastric health

Probiotics, these live micro-organisms with beneficial properties, play a key role in balancing your gut microbiota. But how exactly do they work to improve your gastric health? As a consumer mindful of your gut well-being, you will no doubt be interested in the subtleties of how they act.

Interaction with the microbiota and gastric acid

Probiotics act mainly by modulating the gut microbiota, thereby promoting a balanced flora^[3]. They also interact with gastric acid to create an environment conducive to digestion. For example:

• Production of short-chain fatty acids: these acids help strengthen the gut barrier and reduce inflammation.
• Synthesis of antimicrobial substances: these help inhibit the growth of pathogenic bacteria.

Strengthening the immune system

Probiotics do not merely regulate the microbiota; they also stimulate your immune system. This translates into a better response to pathogens and a reduction in gastrointestinal infections. Certain strains are studied as an adjunct against Helicobacter pylori (H. pylori) and to lower the risk of Clostridium difficile (C. difficile) infection and antibiotic-associated diarrhoea, a topic also examined in the context of antibiotic resistance. Have you ever noticed an improvement in your resistance to seasonal illnesses after adding probiotics to your daily routine?

Improving digestion and reducing symptoms

Besides their effects on the microbiota and immunity, probiotics also aid digestion by breaking down certain complex nutrients. For those with food intolerances or chronic digestive disorders, this action can be particularly beneficial. A large systematic review and meta-analysis of randomised controlled trials in irritable bowel syndrome suggests that some strains or combinations, such as Lactobacillus, Bifidobacterium and other species, may help relieve digestive symptoms, although the overall certainty of the evidence remains low^[2]. This may help some people enjoy their meals with less bloating or discomfort.

Thoughtfully incorporating probiotics into your diet could therefore transform not only your digestive comfort but also your overall quality of life.

Risks associated with probiotic use in sensitive patients

Although probiotics are widely recognised for their benefits to digestive and immune health, they can present certain risks when used by individuals with particular sensitivities^[1]. Indeed, in some people with specific medical conditions or a weakened immune system, introducing new bacterial strains into the microbiota can cause adverse effects.

Immunocompromised patients: heightened vigilance

For immunocompromised patients, such as those on immunosuppressant treatment or with autoimmune diseases, probiotic use should be considered with caution. Why? Because their body is less able to regulate the bacterial proliferation introduced by these supplements. Isolated cases of opportunistic infections and other adverse events have been reported in such patients, where strains that are normally beneficial were able to cross a weakened gut barrier and enter the bloodstream^[1]. Particular caution applies to people with weakened immune systems and to premature infants, where probiotics have rarely been linked to necrotizing enterocolitis.

Pre-existing gastrointestinal disorders: watch for interactions

People with chronic gastrointestinal disorders such as irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD) should also exercise caution. Adding probiotics could exacerbate certain symptoms such as bloating, gas, cramping or nausea because of a complex interaction between the bacterial strains and an already fragile microbiota. This is especially relevant in ulcerative colitis and Crohn’s disease, and an excess of bacteria may even contribute to small intestinal bacterial overgrowth (SIBO).

Allergies and hypersensitivities: identifying the components at risk

Here are some recommendations for people who are allergic or hypersensitive:

• Certain probiotic products contain excipients that may induce allergic reactions.
• Read the labels carefully to avoid any problematic component such as lactose or gluten.
• Do not hesitate to consult a healthcare professional before adding a new probiotic to your daily regimen.

Remember that, although probiotics are generally safe for most individuals, it is crucial for those with specific medical conditions or particular sensitivities to assess their use carefully. A prior consultation with a competent professional can help you navigate these options while minimising the potential risks.

Precautions to take for gastric health

The use of probiotics can generate considerable interest among consumers keen to improve their gut well-being. However, it is imperative to consider certain precautions before adding these beneficial micro-organisms to your daily routine. Have you ever thought about the potential interactions with your current treatments or pre-existing medical conditions?

Consult a healthcare professional

Before adopting a probiotic supplement, consult a qualified healthcare professional. They can assess your unique medical profile and guide you towards a formulation suited to your specific needs. For example, some patients with irritable bowel syndrome might benefit from a specific Lactobacillus strain, while others require a different approach.

Allergy considerations and intolerances

The compositions of probiotic supplements vary widely, sometimes including ingredients that can cause allergic reactions or food intolerances. It is therefore crucial to read the labels carefully and check for the possible presence of allergens such as lactose or soya. Whole-food sources such as fermented foods, and prebiotics that feed beneficial bacteria in the gut microbiome, can be discussed with your physician or healthcare provider.

Ensuring an appropriate dosage

Another essential element is adhering to the dosage recommended by manufacturers or prescribed by your doctor. Excessive consumption could lead to adverse effects such as bloating or abdominal discomfort, thereby compromising your digestive comfort instead of improving it. To limit this risk, it is better to opt for products whose strain and colony-forming units (CFU) dosage rest on solid clinical evidence^[4].

Tracking your body’s reactions

Finally, be attentive to the signals your body sends after introducing probiotics. Persistent symptoms such as gastric pain or diarrhoea should prompt you to reconsider their use and seek informed medical advice.

By incorporating these precautions into your approach, you will maximise not only the potential benefits of probiotics for your gastric health but also for your overall well-being.

Frequently asked questions about probiotics and gastric health