Build up your microbiome: The ultimate guide to your gut
ca. 20 Minuten
If you want to build up your microbiome, it's essentially about purposefully feeding and caring for the trillions of tiny helpers in your gut. Imagine creating a strong, diverse team in your gut through a smart diet and a mindful lifestyle, one that works for your digestion, your immune system, and your overall well-being.
What your microbiome really is and how to strengthen it
You probably hear and read about gut health all the time, but what does "microbiome" actually mean? It isn't some foreign creature, but a living, extremely important part of you. A vast community of trillions of bacteria, viruses, and fungi that live mainly in your gut.
These microscopic inhabitants are anything but passive freeloaders. They work for you around the clock and play a role in far more than just digestion.
More than just digestion
A healthy microbiome is a real multitasker. It helps you break down nutrients from your food and make them available to your body. It also constantly trains your immune system - no wonder, since around 70 % of your immune cells are located right in your gut.
On top of that, your gut bacteria produce essential vitamins, such as vitamin K and some B vitamins. Through the so-called gut-brain axis, they even send signals directly to your brain. In plain English: the balance in your gut directly affects your mood, how well you cope with stress, and your mental fitness.
To delve deeper, read our detailed article about what the microbiome actually is.
When the balance tips
It becomes a real problem when this finely tuned ecosystem gets out of balance. This imbalance - which experts call dysbiosis - occurs when harmful bacteria take over and the diversity of beneficial microbes dwindles.
The effects are often vague and go far beyond classic stomach pain or bloating. Maybe you feel constantly tired, struggle with skin blemishes, or notice that you catch every bug going around. These can all be subtle cries for help from your gut.
Dysbiosis is like a dysfunctional team. When the wrong players are in charge, your whole body suffers - from energy production to immune defenses.
Building your microbiome is not a one-time project, but a dynamic process. It’s about regaining control and strengthening your gut with the right strategies. The following sections give you a practical roadmap to help you achieve this goal and enjoy more energy and well-being over the long term. Consider this knowledge your essential foundation.
Diet as your most important tool
Your daily diet is undoubtedly the most powerful tool for building and maintaining your microbiome. This isn’t about complicated diet rules, but about specifically feeding the beneficial bacteria in your gut. You need to create an environment where they can thrive and multiply.
Think of your gut inhabitants as a garden: Without the right fertilizer and the right plants, only weeds will grow.
To make this inner garden flourish, two concepts are especially important: prebiotics and probiotics. Although the terms sound similar, they serve completely different purposes for your gut health.
Prebiotics: Food for your good bacteria
Prebiotics are, so to speak, your beneficial gut bacteria’s favorite food. They are special, indigestible fibers that pass through the stomach and small intestine unharmed. It’s only in the large intestine that your microbes ferment them.
This “food” specifically stimulates the growth of health-promoting bacterial strains such as bifidobacteria and lactobacilli. And it gets even better: When these bacteria metabolize prebiotics, they produce short-chain fatty acids such as butyrate - a true super fuel for the cells lining your gut.
Prebiotics are not living organisms, but the “fertilizer” for your inner ecosystem. Without them, your best helpers go hungry and cannot multiply.
The good news is that prebiotics are easy to incorporate into your daily routine.
Top sources of prebiotic fiber:
- Legumes: Lentils, chickpeas, and black beans are true powerhouses.
- Vegetables: Artichokes, onions, garlic, leeks, and asparagus provide plenty of fuel.
- Whole grains: Oats, barley, and rye are excellent sources.
- Fruit: Slightly underripe bananas and apples also contain valuable prebiotics.
The key here is variety. Try to combine as many different plant-based sources as possible. This supports a broad range of beneficial bacteria. A balanced diet is essential, as you can also read in our guide to the modern food pyramid and how it is structured.
Probiotics: The living helpers for your gut
Unlike prebiotics, probiotics are living microorganisms. They are the “good” bacteria themselves, which you consume through food. This directly increases the diversity and number of beneficial inhabitants in your gut.
They colonize your gut—at least temporarily—and help restore balance, crowd out harmful microbes, and strengthen the intestinal barrier. Regular intake is important to maintain their beneficial effects.
Fermented foods are the best natural source of probiotics. Fermentation not only creates valuable bacterial cultures, it also makes foods easier to digest.
Add these probiotic foods to your diet:
- Plain yogurt & kefir: Look for products with “live cultures” and no added sugar.
- Sauerkraut: Choose unpasteurized sauerkraut from the refrigerated section—heating kills the beneficial bacteria.
- Kimchi: This Korean fermented vegetable dish is a flavorful and effective source.
- Kombucha: This fermented tea drink contains a variety of yeasts and bacteria.
Polyphenols: The underrated protectors
In addition to prebiotics and probiotics, there is a third group of compounds that is essential for building a healthy microbiome: polyphenols. These are plant compounds that give fruits, vegetables, and tea their vivid colors and, in some cases, their slightly bitter taste.
Polyphenols have powerful antioxidant and anti-inflammatory effects in the body. Some of them also make it as far as the large intestine, where your bacteria metabolize them. There, they promote the growth of beneficial bacteria such as Akkermansia muciniphila (which is extremely important for a healthy intestinal lining) while inhibiting the growth of unwanted microbes.
Excellent sources of polyphenols include:
- Berries (blueberries, raspberries, strawberries)
- Dark chocolate (with a high cocoa content)
- Green and black tea
- Red wine (in moderation)
- Nuts and flaxseeds
These powerful compounds are the perfect finishing touch to your gut-friendly diet.
Here’s a quick overview to help you choose the right foods for your gut.
Top foods for building your microbiome
An overview of the most important nutrient groups and foods that specifically support a healthy gut microbiome.
| Nutrient group | Effects in the gut | Examples of foods |
|---|---|---|
| Prebiotics | Serve as “food” for good bacteria, promoting their growth and the production of butyrate. | Onions, garlic, leeks, artichokes, lentils, chickpeas, oatmeal, unripe bananas |
| Probiotics | Provide live, beneficial bacteria that support the balance of the gut flora and increase its diversity. | Plain yogurt, kefir, unpasteurized sauerkraut, kimchi, kombucha, miso |
| Polyphenols | Have antioxidant and anti-inflammatory effects and promote the growth of specific beneficial bacteria such as Akkermansia. | Berries, dark chocolate (>70%), green tea, nuts, flaxseed, olive oil |
By combining foods from all three categories, you optimally nourish your microbiome and create the best conditions for robust gut health.
Your practical plan
Putting this into practice doesn’t have to be complicated. Even small but consistent changes can make a big difference. The German Nutrition Society (DGE) confirms that our diet measurably affects the gut flora within a few days to a few weeks.
While the recommended daily fiber intake is 30 g, many adults in Germany get only around 18–23 g. However, a consistent change in diet over 8–12 weeks can already show clear positive effects on the gut’s bacterial profile.
A simple way to start could look like this: Begin your day with oatmeal (prebiotics) and a handful of berries (polyphenols), mixed with plain yogurt (probiotics). That way, you’ve already included all three key components at breakfast and prepared your gut for the day.
When probiotics and prebiotics are truly useful
A varied, fiber-rich diet is and remains the foundation for a healthy gut. But let’s be honest: there are situations in life when even the best diet has its limits.
Imagine your inner garden has been completely devastated by a storm - like a necessary course of antibiotics. Simply fertilizing it is often no longer enough. You need to plant new, resilient plants to get the ecosystem back on its feet.
That’s exactly where probiotic and prebiotic supplements come in. They’re not miracle cures, but in certain situations they’re extremely effective tools for building up your microbiome in a targeted way.
Choosing the right helpers for the right job
The probiotic market is huge and confusing. Grabbing just any product off the shelf is often like playing the lottery. The key is knowing which bacterial strains are right for your specific concern, because each strain has its own superpowers.
The best-known and most thoroughly researched groups are Lactobacilli and Bifidobacteria.
- Lactobacilli: These lactic acid bacteria are true all-rounders. Strains such as Lactobacillus rhamnosus GG and Lactobacillus plantarum are known to strengthen the gut barrier and can help regulate digestion.
- Bifidobacteria: They are particularly important inhabitants of the large intestine and play a key role in producing short-chain fatty acids. Strains such as Bifidobacterium lactis are often associated with strong immune function.
Probiotics aren't just for humans; our pets can benefit from them too. Find out more in this helpful guide to Probiotics for Dogs.
Choosing the right probiotic is like choosing the right tool. A hammer is great for driving in a nail, but useless when you need to tighten a screw. In the same way, each bacterial strain has a specific function in the gut.
If you'd like to learn more about the most important gut bacteria, you'll find many more fascinating details in our article about Bifidobacteria and Lactobacilli.
CFU - What the number on the package means
On every good probiotic package, you'll find the abbreviation “CFU.” It stands for colony-forming units and tells you how many live, viable bacteria are contained in each dose.
More isn't automatically better, but for effective support, you should be getting at least a few billion. Values between 5 and 20 billion CFU per daily dose are a good guideline for most uses.
Prebiotics as targeted nourishment
While probiotics are the new workers you send into your gut, concentrated prebiotics are the special feed that ensures they stay there and multiply. This is especially useful if you don't get enough fiber from your diet alone.
Powdered prebiotics, such as inulin (derived from chicory root) or acacia fiber, are easy to mix into yogurt or a smoothie. They provide targeted nourishment for your beneficial bacteria, sustainably promoting their growth.
Practical everyday applications
So when is it really worth reaching for these helpers? Here are some typical situations where targeted support can make a difference.
Scenario 1: After antibiotic therapy
- Problem: Antibiotics don’t distinguish between good and bad bacteria. They often leave a “scorched earth” in your gut, drastically reducing the diversity of your microbiome.
- Solution: A course of several weeks with a probiotic containing various strains of lactobacilli and bifidobacteria can help replenish the gaps more quickly. It’s best to start during treatment, but leave a few hours between taking it and your antibiotics.
Scenario 2: For irritable bowel syndrome
- Problem: Many people with irritable bowel syndrome have an imbalanced gut flora, which can cause bloating, abdominal pain, or irregular bowel movements.
- Solution: Specific strains such as Bifidobacterium infantis 35624 or Lactobacillus plantarum 299v have been shown in studies to ease symptoms. Choosing the right strains is especially important here, possibly after an analysis.
Scenario 3: Strengthening your immune system in winter
- Problem: During the cold season, you’re susceptible to every bug going around. Since much of your immune system is located in your gut, a strong gut flora is your first line of defense.
- Solution: Taking probiotics preventively over the winter months, with strains such as Lactobacillus rhamnosus GG or Bifidobacterium lactis BB-12, can support your immune system.
Using pro- and prebiotics strategically is a powerful addition to a gut-friendly diet. The goal isn’t to try things blindly, but to understand what your gut really needs in a particular situation. This way, you can support your microbiome effectively and purposefully.
How stress and sleep affect your gut flora
Building a strong microbiome is about more than just what you eat. You can be as mindful as you like about your diet—but if your lifestyle isn’t on board, you’ll undermine your own progress. Two of the biggest, yet often underestimated, factors are stress and sleep.
Your gut and brain are in constant communication via the so-called gut-brain axis. Think of it as a data highway carrying messages in both directions around the clock. What’s going on in your head therefore has direct effects on your gut—and vice versa.
The effects of chronic stress
Do you know the feeling? Before an important presentation or an exam, your stomach suddenly starts churning uneasily. That’s the gut-brain axis in action. Short-term stress is completely normal and usually isn’t a problem. Chronic stress, however—the everyday pressure that just never lets up—is a real saboteur of your gut flora.
When you’re constantly under pressure, your body releases stress hormones such as cortisol. These hormones can reduce the diversity of beneficial bacteria, make the gut barrier more permeable (the so-called “leaky gut”) and fuel low-grade inflammation. Essentially, you’re creating an environment where “good” microbes feel uncomfortable and “bad” ones have the upper hand.
Chronic stress is like a constant source of interference in communication between your gut and brain. It weakens your beneficial bacteria and opens the door to an imbalance that can affect your overall health.
Practical tips for reducing stress on your gut:
- Mini breathing breaks: Take just three minutes several times a day to practice slow, deep belly breathing. This sends a direct signal to your nervous system to switch from “fight or flight” mode to “rest and digest” mode.
- Get outside: Even a 20-minute walk in a green space has been shown to lower cortisol levels.
- Digital break: Consciously put your smartphone aside, especially at mealtimes. Eating mindfully and without distractions not only improves digestion but also reduces perceived stress.
These small but consistently practiced habits are what ultimately make a big difference to the balance in your gut.
Why your gut regenerates at night
The quality of your sleep is just as important as your stress level. While you sleep, essential repair processes take place in your body, including in your gut. The cells in your intestinal lining renew themselves, and your microbiome gets the time it needs to stabilize.
Sleep deprivation completely disrupts this rhythm. Studies show that even a few nights of too little sleep can negatively alter the composition of the microbiome. Diversity decreases, and the balance between beneficial and potentially harmful bacteria shifts.
Research from German centers such as Kiel and Jena also shows that the microbiome’s metabolic activity naturally declines with age. Factors such as chronic stress and sleep deprivation can accelerate this process and, for example, reduce health-promoting lactobacilli. A healthy lifestyle is therefore key to maintaining a “young” and diverse microbiome, as you can also read in the findings of medical research on the microbiome.
Strategies for gut-friendly sleep:
- Establish an evening routine: Turn off all screens an hour before bed. Reading a book or listening to relaxing music prepares your brain for rest.
- Pay attention to the timing of your meals: Heavy, fatty meals shortly before bed are off-limits. Your digestive system needs a break overnight, too.
- Create a cool, dark environment: An optimal sleeping temperature and complete darkness promote the production of the sleep hormone melatonin, which also has a protective effect on the gut.
Exercise: finding the golden mean
Physical activity also communicates directly with your gut microbes. Regular, moderate exercise is fantastic for building your microbiome. It boosts blood flow to the gut and promotes the production of the important anti-inflammatory short-chain fatty acid butyrate.
But be careful: more is definitely not always better. Excessive exercise, such as running a marathon without adequate preparation, puts your body under intense stress. This physical stress can temporarily make the gut barrier more permeable and seriously disrupt the balance of your gut flora.
So find a balance that feels right for you. A mix of moderate endurance exercise, such as jogging or cycling, and targeted strength training is ideal for supporting your microbiome’s diversity without overtaxing your body.
Track your progress instead of just guessing
You eat mindfully, manage stress, and incorporate fermented foods into your daily routine. That’s fantastic! But how can you really tell whether your efforts to build your microbiome are paying off and promoting exactly the right bacterial cultures?
Flying blind isn’t a good strategy for your health. Guesswork and general advice will only get you so far. To take a targeted and efficient approach, you need a clear picture of where you stand—a kind of map of your inner ecosystem.
Why an analysis is the best starting point
A microbiome test is much more than just a snapshot. It’s your personal compass, guiding you along the way. Instead of guessing which probiotic strains you need or whether you’re eating enough fiber, you’ll get measurable data.
A modern stool analysis, such as the mybody® Microbiome Analysis, gives you detailed insights into the composition of your gut flora. It provides a scientifically sound basis for personalizing your approach. No more taking a one-size-fits-all approach—instead, you can start targeting the right areas.
A microbiome test turns guesswork into knowledge. It shows you not only where you stand, but also which steps will be most effective for you personally.
With a report like this in hand, you can create a plan tailored precisely to your gut’s needs. You can choose the right probiotics and adjust your diet to feed the specific bacteria that are lacking. For comprehensive information about how it works and its benefits, see our article on the at-home stool test.
The following infographic shows how closely stress, the gut, and sleep are connected through the gut-brain axis—a cycle you can break with the right data.
This visualization shows how external pressure directly affects your microbiome, which can in turn impair your sleep quality—a test can make these connections clear to you.
Which markers really matter
A good analysis report doesn’t just give you an overwhelming list of bacteria. It translates complex data into clear, actionable information. Important markers it examines include:
- Bacterial diversity: A key indicator of a healthy microbiome. High diversity means your gut is more resilient to disruptions.
- Firmicutes-to-Bacteroidetes ratio: This ratio provides clues about how you process energy from food and may be linked to body weight.
- Presence of key bacteria: This is where things get really interesting. The analysis shows whether important helpers such as Akkermansia muciniphila (essential for a healthy intestinal lining) or Faecalibacterium prausnitzii (a top producer of anti-inflammatory butyrate) are present in sufficient numbers.
- Dysbiosis index: A value indicating whether there is a general imbalance in your gut flora.
- Fungal load: This also checks whether yeasts such as Candida albicans have overgrown, which can also cause symptoms.
General approach vs. analysis-based gut health plan
Anyone looking to improve their gut health often faces a choice: start with general tips or dive straight in with an analysis? The following table shows why the second approach is wiser in the long run.
| Aspect | General approach (without a test) | Analysis-based approach (with mybody® test) |
|---|---|---|
| Efficiency | Vague and often inefficient, since you can only guess what your gut needs. | Highly efficient, since measures directly target the deficiencies identified by the test. |
| Diet | You follow general advice such as “eat more fiber.” | You know exactly which specific dietary fibers (e.g., inulin) you should increase. |
| Probiotics | You choose at random, often without any noticeable effect. | You can specifically select bacterial strains that have been shown to be missing in your gut. |
| Motivation | Hard to maintain, as progress isn’t visible. | High motivation, since repeating the test after a few months objectively confirms your progress. |
| Cost | Low upfront costs, but potentially high expenses for useless products. | An initial investment in the test that quickly pays for itself through targeted and effective measures. |
Then, repeating the test after around six to twelve months is not just a checkup, but the greatest motivator of all. When you see in black and white how the diversity of your gut flora has increased and important bacteria have taken up residence again, you’ll know that every step was worth it.
This gives you the strength you need to stay consistent and stabilize your gut health in the long term.
The most frequently asked questions about rebuilding your microbiome
On the journey to a healthy gut, many similar questions come up. That’s why we’ve summarized the most important points to help put your mind at ease and clear up any remaining questions on your journey to successfully rebuilding your microbiome.
How long does it really take to rebuild your microbiome?
This is probably the question we get asked most often - and the honest answer is: it all depends on you. Your microbiome is as unique as your fingerprint, and how quickly it recovers depends largely on your personal starting point.
You’ll often notice the first positive changes after two to four weeks of consistently changing your diet. Perhaps you’ll notice that your digestion suddenly becomes much more regular, or that you start your mornings with more energy.
But if your microbiome is severely damaged, for example after a long course of antibiotics, it becomes a marathon, not a sprint. The process can take several months or even a year. Patience and consistency are your most important tools here.
Should I give up if I experience bloating during the transition?
Not at all! Even if it feels uncomfortable at first, initial bloating or mild rumbling in your stomach is often a really good sign. It shows that something is finally happening in your gut.
Imagine serving your good gut bacteria their favorite food—fiber—after a long time without it. They dig in and, in a way, feast. This fermentation process produces gas, which is perfectly normal. Your gut needs time to get used to the new “workload.”
Think of initial bloating as positive feedback from your gut. It’s a sign that the new “workers” have started doing their job and the ecosystem is being rebuilt.
Our practical tip: Take it slowly. Gradually increase the amount of fiber-rich foods over several weeks. And, most importantly, drink plenty of still water! The discomfort usually goes away on its own after a week or two.
Can I build up my microbiome without supplements?
Yes, absolutely. A varied diet rich in plant foods and fiber is, and remains, the foundation for successfully building up your microbiome. For many people, this alone is the key to strengthening their gut flora in the long term.
Supplements such as probiotics are no substitute for a healthy lifestyle, but they can be an extremely powerful tool. They can be particularly helpful when:
- You’ve just finished a course of antibiotics.
- You’re struggling with specific conditions such as irritable bowel syndrome.
- A microbiome analysis reveals a clear lack of certain bacterial strains.
They help you target your gut’s weak spots.
What role does sugar play in my microbiome?
Sugar is basically “fast food” for the unwanted residents in your gut—certain bacteria and yeasts such as Candida. A high intake of added sugar and easily digested carbohydrates feeds these troublemakers and can seriously throw your gut flora out of balance.
These harmful microbes crowd out beneficial bacteria and can fuel low-grade inflammation in the body. Cutting back on added sugar in sweets, pastries, and ready-made meals is therefore one of the most effective steps you can take to give your good gut bacteria the upper hand again.
mybody-x.com knows that the path to a healthy microbiome looks different for everyone. If you want to stop guessing and find out exactly what your gut needs, a thorough analysis is the first step. Discover the mybody® Microbiome Analysis now and get your personalized roadmap to greater well-being: https://mybody-x.com
