
Was sind Probiotika?
Begutachtet von Dr Colin Tidy, MRCGPZuletzt aktualisiert von Lynn StephenLast updated 28. Jan. 2026
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Ein gesunder Darm unterstützt Ihr Immunsystem, schützt vor Krankheiten und fördert die täglichen Funktionen Ihres Körpers. Probiotika sind die guten Bakterien, die dazu beitragen können, Ihren Darm gesund zu halten. Aber was genau tun sie? Gibt es wirklich Vorteile beim Verzehr von probiotischen Lebensmitteln und Nahrungsergänzungsmitteln?
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Was sind Probiotika?
Probiotika are live bacteria and yeasts found in your digestive system. The word probiotics is also used to describe foods or supplements which contain large amounts of these tiny living organisms.
Some popular probiotic health products often refer to these as the friendly bacteria or good bacteria. To scientists, these bacteria are known as microbes.
What do probiotics do?
Zurück zum InhaltProbiotics help to keep your gut healthy. The gut refers to your entire digestive system, from mouth to anus, also known as your digestive tract.
In your gut, you have thousands of different types of bacteria and other microorganisms. Scientists call this your gut microbiome. Probiotics are the bacteria that support important bodily functions and your overall health.
Every person has gut bacteria that can cause you harm if there are too many in comparison to probiotics. This imbalance is called gut dysbiosis, and it can be brought on by infectious disease, long-term use of bacteria-destroying medicines such as Antibiotika, or by following certain diets.1
If this happens, you can increase the levels of probiotics in your gut by consuming probiotic foods or supplements. Your gut microbiome plays a key role in your immune system and many daily operations of the human body. So evidence suggests that addressing an imbalance of bad and good bacteria may help protect against several diseases and health issues.
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What are the benefits of taking probiotics?
Zurück zum InhaltThere is little evidence that taking probiotics through food or dietary supplements can benefit healthy people. Research even suggests that many people's gut microbiomes don't change when they consume probiotics, and that most actually pass right out of the body.
Yet, if you have an issue linked to your digestive health, probiotics may be worth trying.
There's evidence that taking probiotics may help:
Relieve the symptoms of irritable bowel syndrome (IBS) - and certain probiotic strains may be better for this than others.
Reduce occurrences of regular Durchfall, Verstopfung, bloating, and wind.
Improve Laktoseintoleranz symptoms.
Manage blood sugar levels in people with Typ-2-Diabetes.
Probiotics may also be beneficial for:
Schwangerschaft - they may help protect against pregnancy complications, support your maternal health, and reduce the chance of your baby developing certain conditions.
Babies - as 70% of the immune system is in the gut, probiotics may aid the development of your baby's immune system and help with certain health conditions such as asthma, infant colic, and food allergies.
People who take a prolonged course of bacteria-destroying medicines - such as antibiotics.
How to use probiotics safely
Zurück zum InhaltProbiotic fermented foods
Whether you have a specific gut-related health concern or not, eating probiotic foods is not only safe but good for your general health. For example, the fermented dairy drink kefir may also be useful in preventing and treating cancer - however it should not be used instead of traditional medicines for treating cancer - with research in this area ongoing.2
We explore the five best probiotic foods here.
Probiotische Nahrungsergänzungsmittel
There are also plenty of probiotic supplements. You can get these as oral tablets, liquids, or sachets. Provided that you follow the instructions for the recommended dosage, these are safe for everyone to use, although if you're pregnant you should speak to your pregnancy healthcare advisor first. There's currently no evidence that probiotics are unsafe in the long term, although we need more research on the effects of extended use.
If you have a gut-related issue, your doctor or dietitian may recommend a specific probiotic supplement. However, these products are also widely available online and in pharmacies. If shopping around yourself, make sure you choose a quality product.
Buying a quality supplement
Probiotic strains - if taking for a specific health problem, check if the probiotic strain has been specifically studied for that issue.
Colony-forming units (CFU) - check if the label details the CFU count. This is the amount of live friendly bacteria the product contains. A quality product will contain at least 1 billion CFU per dose.
Randomisierte kontrollierte Studien - you can check the product manufacturer website or contact them to find out the research they have done. The most reliable studies are:
Placebo-controlled - participants are randomly assigned to receive either a real or fake probiotic.
Double-blind - neither the scientist nor the participant knows if they are taking the real or fake probiotic.
Unabhängige Tests - check if the supplement that has had third-party testing by an independent laboratory.
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Weiterführende Literatur und Referenzen
- Harvard T.H. Chan; The Microbiome
- Sharifi M, Moridnia A, Mortazavi D, et al; Kefir: a powerful probiotics with anticancer properties. Med Oncol. 2017 Sep 27;34(11):183. doi: 10.1007/s12032-017-1044-9.
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Artikelverlauf
Die Informationen auf dieser Seite werden von qualifizierten Klinikern begutachtet.
Nächste Überprüfung fällig: 28. Jan 2029
28. Jan. 2026 | Neueste Version
27. Jan 2023 | Ursprünglich veröffentlicht
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