What exactly are probiotics?
Probiotics are defined as living microorganisms that, when consumed in adequate amounts, have a positive effect on overall health. The World Health Organization (WHO) uses this strict definition to distinguish between common bacteria and strains whose properties have been scientifically documented.
Most often, these are bacteria, but certain yeasts can also function as probiotics. They occur naturally in fermented products like yogurt and kefir, but are also offered in concentrated form in supplements to make a targeted contribution to intestinal balance.
The biological mechanisms of action
The effects of probiotics in the human body are multifaceted. They interact directly with the existing intestinal flora and the intestinal wall. Some important biological processes include:
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Competitive exclusion: Probiotics compete with unwanted microorganisms for space and nutrients in the gut, maintaining a favorable environment.
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Barrier function: They contribute to supporting the integrity of the intestinal wall, which is essential for good control of permeability.
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Metabolite production: During their metabolism, these microorganisms produce substances such as short-chain fatty acids (such as butyrate), which play an important role in the energy supply of intestinal cells.
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Modulation of the Gut-Brain Axis: Scientific context increasingly focuses on the communication between the gastrointestinal tract and the brain, with microorganisms playing a role in biochemical signaling.
Relevance of specific bacterial strains
Not every probiotic is created equal. Their effectiveness is strain-specific. This means that the properties of, for example, Lactobacillus rhamnosus GG cannot be directly extrapolated to another Lactobacillus strain.
Commonly used genders are:
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Lactobacillus: These lactic acid bacteria are mainly found in the small intestine and are frequently used in various formulations.
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Bifidobacterium: These bacteria are dominant in the large intestine and play a role in the stability of the microbiome.
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Saccharomyces boulardii: A yeast that is resistant to stomach acid and is often used in specific situations where the intestinal flora is under pressure.
Applicability and times of use
Probiotics can be used in various life stages and situations as a supplement to a healthy lifestyle:
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After external influences: Certain substances can temporarily affect the natural balance of intestinal flora. Using specific probiotics can provide support during this period.
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During dietary changes: Travel or periods of dietary change can put pressure on the microbiome. Probiotics help maintain its stability.
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Targeted support: For people who are consciously working on their overall well-being and are looking for a targeted supplement that is factually substantiated.
Quality and safety
When selecting a probiotic, the survival of the bacteria is essential. They must reach the intestines alive to be effective. High-quality supplements utilize techniques like micro-encapsulation or enteric-coated capsules to protect the bacteria from the acidic environment of the stomach.
Probiotics are generally considered safe for healthy people. Mild effects such as bloating or gas may occur in the first few days of use, which is a sign that the intestinal flora is adapting to the new microorganisms.
Summary
Probiotics are more than just "good bacteria." They are carefully selected microorganisms that play a role in maintaining the body's natural balance through various biological mechanisms. By choosing specific strains and a high-quality formulation, you're choosing a fact-based approach to your health.
Frequently Asked Questions (FAQ)
When is the best time to take probiotics? Although this can vary depending on the product, it's often recommended to take probiotics during or just before a meal. This can ease their passage through the stomach and support the survival of the bacteria.
How long does it take before I notice an effect? Adjusting the microbiome is a gradual process. It's often recommended to use a probiotic consistently for at least several weeks to support the natural balance.
Are probiotics safe for everyone? Probiotics have been found to be safe for healthy adults. People with specific medical conditions or weakened immune systems should always consult a professional before starting supplements.
Should all probiotics be stored in the refrigerator? This depends on the stability of the strains used and the production technique. Many modern, high-quality supplements are shelf-stable and can be stored at room temperature, provided they are kept in a dry, dark place.
