Probiotics and prebiotics: The difference: Simply explained

Probiotics and prebiotics – often mentioned in the same breath, but actually two completely different things that help your gut. To understand what really benefits your digestion, it's worth taking a closer look. The difference is actually quite simple once you understand it.

Imagine your gut like a garden: Probiotics are the diligent gardeners or the new seeds you sow. They are live, beneficial bacteria that actively support and enrich your gut flora. Prebiotics, on the other hand, are the fertilizer. They are indigestible fibers that serve as food for the already existing good bacteria and help them grow.

Both are important, but they fulfill fundamentally different tasks.

What really distinguishes probiotics from prebiotics?

Although they are unbeatable as a team, the roles of probiotics and prebiotics in your body could hardly be more different. If you want to specifically promote your gut health, you should know the difference.

The crucial point lies in their nature. Probiotics are live microorganisms – that is, "good" bacteria – that enter the gut directly and strengthen the existing bacterial community there. They actively help to stabilize the balance of the gut flora or to restore it after a disruption, for example, caused by antibiotics.

Prebiotics, on the other hand, are not living organisms. They are special dietary fibers such as inulin or fructooligosaccharides (FOS). Your body cannot digest them, but they are a real feast for your beneficial gut bacteria. They therefore work indirectly by specifically stimulating the growth of the already established good bacteria.

The garden example makes it clear.

To make it even more tangible, let's stick with the image of the garden:

• Probiotics are the seeds: You introduce new, beneficial plants (bacteria) into your garden to increase diversity and make it more resilient.
• Prebiotics are like fertilizer: you give the existing plants the nutrients they need to grow strong. Even the best seeds will struggle to germinate without the right soil.

This distinction is extremely important, as many health-conscious people want to better understand and proactively support their digestive system. A healthy microbiome, supported by both components, is therefore increasingly coming into focus.

The following infographic shows you a direct comparison of the two aids for the gut.

This clearly illustrates that probiotics actively introduce new bacteria, while prebiotics feed the existing flora. This is a crucial difference for your nutritional strategy. A balanced intake of both is ultimately key to healthy digestion. If you'd like to delve deeper, read our guide on how to build up your gut flora with the right diet .

The key point is this: probiotics add to the gut flora , while prebiotics promote it . A healthy microbiome benefits from both. However, it's often the more sustainable approach to specifically support and strengthen the beneficial bacteria already present.

Probiotics vs. Prebiotics: An Overview of the Key Differences

To clearly highlight the most important differences, a direct comparison is helpful. This table shows the key properties of probiotics and prebiotics at a glance – from their function to the best sources for everyday use.

feature	Probiotics	Prebiotics
What it is	Living, beneficial microorganisms (bacteria & yeasts)	Indigestible plant fibers (dietary fiber)
Main function	They colonize the intestines and support the existing flora	They serve as "food" for the good gut bacteria.
Effect	Direct: Add new bacteria to the microbiome	Indirectly: They promote the growth of existing bacteria.
Examples in food	Yoghurt, kefir, sauerkraut, kimchi, miso, kombucha	Onions, garlic, leeks, asparagus, bananas, chicory
Condition	They must arrive alive in the intestine to be effective.	They are not alive and therefore less sensitive
Goal	Increase diversity, restore balance	Targeted strengthening of the "good" bacteria population

As you can see, they complement each other perfectly. While probiotics provide a boost, prebiotics take care of the well-established inhabitants of your gut.

How probiotics directly support your gut flora

Now that we've clarified the fundamental difference, let's delve deeper into the world of probiotics. Think of them as highly specialized little helpers with a very clear mission: to actively and directly enrich your gut ecosystem. Probiotics are live microorganisms—that is, "good" bacteria or yeasts—that provide health benefits when present in sufficient quantities in your gut.

Their journey there, however, is quite challenging. In order to have any effect at all, they must survive the aggressive stomach acid and arrive alive in the intestines. Only then does their actual work begin.

The mechanism of action of the living helpers

The effect of probiotics is based on several clever strategies. They temporarily colonize the intestinal wall and compete there with potentially harmful germs for space and nutrients. You can really think of it as a competition in which the "good" bacteria push out the "bad" ones.

In addition, some probiotic strains produce substances that actively inhibit the growth of unwanted bacteria. They also strengthen the intestinal barrier – that important protective layer that prevents harmful substances from entering the bloodstream. This mechanism is crucial for a functioning immune system, a large part of which resides in the gut.

The best-known probiotics are:

• Lactobacilli: These lactic acid bacteria are frequently found in yogurt and other fermented dairy products. They help, for example, with the digestion of lactose.
• Bifidobacteria: These bacteria are important inhabitants of a healthy large intestine. There, they play a central role in the production of valuable short-chain fatty acids. You can learn more about the function and importance of bifidobacteria for your gut health in our comprehensive guide.
• Saccharomyces boulardii: This is a yeast that has proven particularly effective in relieving diarrhea, especially after taking antibiotics.

Important note: Probiotics are not a one-size-fits-all solution. Their health benefits are always strain-specific. This means that a bacterial strain that helps with digestive problems is not necessarily effective for the immune system.

Challenges and the right sources

One of the biggest challenges with probiotics is their long-term colonization of the gut. Many probiotic strains are only "temporary visitors" and must be administered regularly to maintain their beneficial effects. Their effectiveness therefore depends heavily on the dosage and the viability of the specific strain.

To support your gut flora with probiotics, you can use natural food sources. These include fermented products such as:

• Yogurt with live cultures
• kefir
• Sauerkraut (very important: unpasteurized)
• Kimchi
• Kombucha

When choosing probiotic supplements, look for a high number of colony-forming units (CFU) and enteric-coated capsules. This is the only way to ensure that the bacteria actually reach the intestines alive. However, not everyone needs probiotics indiscriminately. Targeted support is often more beneficial than a blanket approach, as an excess or the wrong strain can, in some cases, lead to bloating.

Why prebiotics are the sustainable foundation for your microbiome

While probiotics are often touted as quick fixes, the true, long-term strength for a healthy gut flora often lies with prebiotics. Think of them as the gardeners of your internal ecosystem – often underestimated, but absolutely crucial. Instead of introducing new bacteria from the outside, prebiotics work precisely where it's most effective: with your existing, beneficial gut bacteria.

Prebiotics are essentially special, indigestible dietary fibers. This means your body cannot break them down and use them as an energy source. However, they are a veritable feast for your beneficial gut bacteria, especially the important bifidobacteria and lactobacilli .

This targeted "fertilizing effect" is precisely the crucial difference between prebiotics and probiotics . Prebiotics selectively feed exactly those strains of bacteria that are most beneficial to your health. In this way, you strengthen your microbiome from the inside out.

The engine for your gut health

When your beneficial gut bacteria metabolize these prebiotics, something extremely important happens: short-chain fatty acids (SCFAs) are produced. The best-known and most important of these is butyrate.

These tiny molecules are real powerhouses for your gut. Butyrate serves as the primary energy source for the cells of your intestinal lining. And this has far-reaching positive effects:

• Strengthening the intestinal barrier: A well-nourished intestinal lining is denser and more resilient. This prevents unwanted substances from entering your bloodstream – an effect also known as "leaky gut".
• Anti-inflammatory effect: SCFAs help to regulate inflammatory processes in the intestine, which plays a central role, especially in chronic conditions.
• Improved nutrient absorption: A healthy gut can absorb important minerals such as calcium and magnesium much better.
• Appetite regulation: Short-chain fatty acids are even involved in the production of hormones that control your feeling of satiety.

By consciously enriching your diet with prebiotics, you're not just investing in the growth of beneficial bacteria. You're actively promoting the production of these valuable metabolic products. This is a truly sustainable approach that goes far beyond the often only temporary colonization provided by probiotics.

The best prebiotic sources for your everyday life

The great thing about prebiotics? You can find them in everyday foods that you probably already have at home. So you don't have to hunt for exotic ingredients to do something good for your gut flora. Some of the most potent sources include dietary fibers like inulin and fructooligosaccharides (FOS).

The following foods are particularly rich in these helpful substances:

• Chicory: The root is one of the richest natural sources of inulin.
• Onions, garlic and leeks: These everyday heroes provide a good dose of prebiotics.
• Asparagus: Not only delicious, but also an excellent fertilizer for your gut bacteria.
• Jerusalem artichoke: This often forgotten tuber is also an inulin champion.
• Artichokes: Contain valuable fiber that your gut flora will love.

Incidentally, even slightly unripe bananas contain resistant starch, which acts much like a prebiotic. You can learn more about the health benefits of bananas and their fiber in our special guide. Simply incorporating these foods into your meals is a huge step towards a healthy microbiome.

Prebiotics can significantly boost the growth of your body's own bifidobacteria, while externally administered probiotics often fail to colonize the gut permanently. Prebiotics such as beta-glucan from oats or resistant starch from bananas serve as targeted nutrients, improve the intestinal barrier, and have been shown to reduce inflammation. Further information on this topic is also available from the Federal Centre for Nutrition (BZfE) .

Utilizing the synergy of synbiotics for maximum effect

Okay, now you know the difference between probiotics and prebiotics – one is the hardworking helper, the other their favorite food. But what happens when you combine both? Then we're talking about synbiotics , and this is where the real magic for your gut health begins.

The idea behind it is as simple as it is ingenious: Why choose one when both together are so much more powerful? A synbiotic gives you both in one go – the beneficial probiotic bacteria and the matching prebiotic nutrients.

Why the team is stronger than the individual player

Imagine sending a group of highly motivated specialists (probiotics) into a completely new work environment (your gut). Without the right resources or proper training, they will struggle to find their way around and do their job.

This is precisely where prebiotics come into play. In a synbiotic product, they are essentially the "starter kit" or the provisions brought along for the new probiotic strains.

This approach has clear advantages:

• Improved survival chances: The prebiotics ensure that the new bacteria are well supplied on their journey through the stomach and small intestine and actually arrive alive at their destination.
• Faster colonization: With their favorite food in tow, the probiotics can colonize, multiply, and become active in the intestine much faster.
• Increased effectiveness: This synergistic effect ensures that the positive effects of probiotics – such as the production of short-chain fatty acids – are significantly enhanced.

A synbiotic is more than just the sum of its parts. It's an intelligent strategy to maximize probiotic effects and provide targeted and effective support for the microbiome.

Simply implement synbiotics in everyday life

The best part? You don't have to immediately resort to expensive supplements to benefit from this principle. You can easily create your own synbiotics by cleverly combining the right foods.

Here are a few simple, but incredibly effective examples for your everyday life:

• Yogurt with oatmeal and banana: The yogurt provides the probiotic lactobacilli, while the oatmeal and banana serve as a perfect prebiotic fertilizer.
• Kefir smoothie with flaxseeds: Kefir is a veritable powerhouse of diverse probiotic cultures. The flaxseeds provide valuable fiber that directly nourishes these cultures. If you'd like to learn more about the health benefits of fermented dairy products, check out our guide on the question "Is kefir healthy?"
• Sauerkraut with wholemeal bread: Fresh, unpasteurized sauerkraut provides you with live lactic acid bacteria, and the fiber in the wholemeal bread feeds your good gut bacteria.

These combinations are not only healthy but also delicious and can be easily incorporated into any meal. They demonstrate how straightforward it can be to directly apply knowledge about probiotics and prebiotics.

When are synbiotic supplements beneficial?

Although a balanced diet should always be the foundation, there are situations in which a targeted synbiotic dietary supplement can make perfect sense. This is especially true after a course of antibiotics, in cases of persistent digestive problems, or when dietary changes alone don't bring the desired results.

When choosing a product, you should look for clearly defined bacterial strains and a sufficient amount of prebiotics such as inulin or fructooligosaccharides (FOS). Quality is paramount here to ensure the synergy actually works. However, it's often wiser to first understand your own individual needs before resorting to generic products.

When a microbiome test provides clarity about your gut

You're really trying: you eat healthily, exercise, and take care of yourself. Despite this, you're plagued by digestive problems, often feel tired, or your skin is acting up. Does this sound familiar? You're not alone. Often, the cause lies deeper – in your gut microbiome.

Instead of continuing to grope in the dark and randomly trying probiotics or prebiotics, you can take a targeted look inside your body. This is precisely where a personalized analysis comes into play. It's the crucial step away from guesswork and toward genuine knowledge about your gut's needs.

From general advice to precise knowledge

Your gut is a vast, complex ecosystem with trillions of microorganisms. General advice like "Eat more yogurt" can be a start, but it rarely solves individual problems. Even the difference between probiotics and prebiotics shows how targeted your approach actually needs to be. But how do you know what your gut really needs?

A gut microbiome test answers precisely this question. Instead of making sweeping assumptions, it provides you with a detailed snapshot of your gut flora. You receive precise data about the composition and diversity of your bacterial community.

For example, a mybody®x gut microbiome test looks at:

• The diversity of your microbiome: High diversity is a clear sign of a robust and healthy gut ecosystem.
• The ratio of beneficial to potentially harmful bacteria: Is there an imbalance (dysbiosis) that could explain your symptoms?
• The presence of certain bacterial strains: Are you perhaps lacking important bifidobacteria or lactobacilli? Or have unwanted germs multiplied excessively?
• Short-chain fatty acid production: Does your gut produce enough butyrate to nourish your intestinal lining and keep inflammation in check?

This analysis provides you with a scientifically sound basis for finally making the right decisions for your health. It is the guide that shows you where to start.

A microbiome test is like a map of your internal ecosystem. It shows you not only where you currently stand, but also which path you need to take to reach your goal – greater well-being.

Probiotics, prebiotics or both – the individual answer

With the results of your test in hand, the question of whether you need probiotics, prebiotics, or a combination of both suddenly becomes crystal clear. The analysis shows you in black and white which strategy makes the most sense for you.

Let's imagine three possible scenarios that a test could uncover:

Scenario 1: Lack of beneficial bacteria. Your result shows that certain important bacterial groups, for example bifidobacteria, are only very weakly represented.

• Your recommendation: Targeted probiotics could be invaluable here to directly fill this gap. At the same time, the new and remaining beneficial bacteria need the right nutrients – namely prebiotics like inulin from chicory.

Scenario 2: Low diversity and few butyrate producers. Your gut flora is generally fine, but it lacks diversity and the crucial butyrate-producing bacteria.

• Your recommended course of action: The focus here is clearly on prebiotics . A diet rich in resistant starch (e.g., from cooled potatoes) and fiber from leeks, onions, and whole-grain products is key now. This way, you specifically feed the existing beneficial bacteria and boost their activity.

Scenario 3: A severe imbalance (dysbiosis) The test shows a clear dominance of potentially harmful bacteria, while the beneficial strains are in the minority.

• Your recommendation: In this case, a combined strategy (synbiotics) is most effective. High-dose, specific probiotics help to suppress the "bad" bacteria. At the same time, prebiotics create an environment in which the "good" bacteria can thrive and prevail in the long term.

A mybody®x gut microbiome test provides you not only with data, but also with tailored recommendations. You'll learn exactly which foods and nutrients your gut needs right now to regain its balance. This transforms your diet into personalized support for your gut health.

Develop your personal strategy for greater well-being

A test result is just the beginning – the starting signal, so to speak, for your journey to greater well-being. Now comes the really exciting part: You transform the insights from your mybody®x gut microbiome test into a concrete, actionable plan that perfectly suits you and your lifestyle.

Instead of generic advice, you'll receive a personalized roadmap tailored to the unique needs of your gut. This clarity takes the guesswork out of your health routine and puts you back in control.

From data to your daily routine

A test result might seem complex at first glance, but don't worry: We translate the scientific data into simple, everyday action steps. This way, you can immediately see where you can start to achieve the greatest effect.

Your personal recommendations could look something like this:

• Focus on prebiotics: Your test shows a good diversity of bacteria, but the butyrate producers could use some extra support. The clear recommendation would then be: specifically, integrate more leeks, asparagus, and oatmeal into your diet. We'll even give you specific recipe ideas on how to easily do this.
• Targeted probiotics: Perhaps a deficiency of specific bifidobacteria has been detected. Your strategy could then be to eat a probiotic yogurt or kefir containing precisely these strains for a limited time.
• Combined strategy: In the case of a more significant imbalance, we may suggest a synbiotic approach – that is, the clever combination of fermented foods (probiotics) and fiber-rich vegetables (prebiotics).

This holistic approach from mybody®x looks not only at your diet, but also at your lifestyle. Sometimes, small adjustments in stress management or sleep quality are enough to give your microbiome the crucial positive boost.

Your test result is not a judgment, but your personal compass. It shows you how you can actively take control of your well-being with targeted measures – whether the difference between probiotics and prebiotics is more relevant for you or whether both work together.

You are not alone on your journey.

Knowledge is the first step, but putting it into practice in everyday life is what really counts. That's precisely why we don't leave you alone with your results. Every mybody®x test includes free coaching with our experienced health experts.

In this personal conversation, we will help you:

• To fully understand your results: We explain in clear language what the data means and which connections are important for you.
• Prioritizing your recommendations: Together we will find out which steps are easiest for you to implement and bring the greatest benefit.
• Creating a realistic plan: We support you in successfully and stress-free integrating the recommendations into your everyday life.

Our goal is to empower you to take control of your health. With us, you don't just get a test, but a partner by your side who supports you in achieving lasting improvements and permanently increasing your well-being.

Practical questions: What you really want to know

Probiotics, prebiotics – the terms are now clear. But how do they work in everyday life? We've compiled the most frequently asked questions and answered them here so you can make confident and informed decisions about your gut health.

Probiotics and prebiotics: Should they be taken every day or only when needed?

There is no one-size-fits-all approach here – it all depends on what you want to achieve.

Prebiotics are essential for your beneficial gut bacteria. Regular intake through your diet is not only recommended, but the foundation for a healthy microbiome. Think of onions, garlic, leeks, or oatmeal – they are the fertilizer that builds and nourishes your gut flora in the long term.

The situation is different with probiotics . Often, a course of treatment makes the most sense, for example, after a course of antibiotics, to quickly repopulate the disrupted gut flora. However, continuous use can also be beneficial for chronic conditions or specific health goals.

What side effects should I expect?

To be perfectly honest: Yes, you may experience mild side effects at the beginning. However, these are usually harmless and short-lived. Bloating or a feeling of fullness are typical signs that something is happening in your gut – your microbiome is reorganizing itself and getting used to the increased support.

Our practical tip: Give your body time and start slowly. Instead of taking the full dose right away, gradually increase the amount of prebiotic foods or your probiotic. This allows your gut to adjust properly, and you avoid the typical initial problems.

Isn't a healthy diet enough?

For most people, a balanced, high-fiber diet is indeed the key and often entirely sufficient to meet their prebiotic needs. Those who regularly consume whole grains, legumes, plenty of vegetables and fruit generally provide their gut microbiome with excellent nutrition.

However, there are phases of life or situations in which targeted supplementation can make a real difference. After a course of antibiotics, in cases of certain intestinal diseases, or if the diet has been very unbalanced for an extended period, a high-quality probiotic or synbiotic can specifically and effectively help to get your microbiome back on track.

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Not sure what your gut really needs? Instead of guessing, get the facts. The mybody®x gut microbiome test provides you with crystal-clear, personalized insights and shows you which strategy is right for you. Find your path to greater well-being now at https://mybody-x.com .