Just a few years ago, talking about your gut health outside of a doctor’s office was considered off-limits. Now, we’re all tuned into our microbiome, swapping recipes for chia seed mocktails, and openly discussing bloating at the dinner table. But when it comes to practical, science-backed solutions for gut issues like bloating, social media isn’t the best source—medical professionals are.

If you’re looking to rebalance your gut, you’re probably already familiar with prebiotics and probiotics. But Jo Woodhurst, director of nutrition and education at Ancient + Brave, says you should also pay attention to postbiotics. “Postbiotics are the new frontier in gut health,” the nutritionist tells us. “The more we learn about the microbes living in our gut, the more we understand how they affect our entire body. It’s not just the gut bacteria themselves that influence our health, but also the compounds they produce: postbiotics, which support our bodies in many different ways.”

Let’s dive deeper into the topic.

What are postbiotics?
“The bacteria in your gut ferment the food you eat, breaking down fiber and plant compounds, which creates byproducts and waste,” Woodhurst says. “We call all of this postbiotics. Many of these byproducts are beneficial to our health. When your microbiome is healthy and balanced, postbiotics have a very positive effect. On the other hand, when there’s an imbalance between good and bad gut bacteria—known as dysbiosis—the production of postbiotics can be disrupted, leading to inflammation, a weaker immune system, and metabolic problems.”

What’s the difference between probiotics, prebiotics, and postbiotics?
“Think of your gut as a garden,” says Woodhurst. “Probiotics are the plants. Prebiotics are the nutrients that feed the plants and create the best conditions for them to grow. The more variety you have in your garden, the stronger, more beautiful, and healthier it becomes. Postbiotics are what a healthy garden produces: the oxygen it releases, the fruit it bears, and the way a strong root system stabilizes and influences everything around it. Postbiotics are the result of a well-maintained microbiome, and they’re how your gut communicates with the rest of your body. Take care of the garden, and the benefits will go far beyond it.”

What are the different types of postbiotics?
“The category is broad,” says Woodhurst. Here are some of the most common ones.

– Short-chain fatty acids (SCFAs) like butyrate, propionate, and acetate. These are produced when gut bacteria ferment fiber and are among the most studied postbiotics. Butyrate protects the cells lining your intestine and has strong anti-inflammatory effects. Acetate may help regulate blood sugar and protect against harmful bacteria. Propionate plays a role in appetite control, as research suggests SCFAs can communicate directly with the brain through the vagus nerve.

– Vitamins: Some gut bacteria help produce B vitamins (like B12, folate, and B6) and vitamin K2.

– Enzymes: These are produced during fermentation and support digestion and metabolic functions.

– Peptides and amino acids: This includes bacteriocins, which are natural antimicrobial peptides important for keeping the microbial environment in check, as well as other bioactive peptides that play roles in immunity and signaling.

– Exopolysaccharides: These are sugar-based compounds released by microorganisms during fermentation. Research suggests they can boost immunity, lower cholesterol, and help regulate blood pressure. Kefir, made by its bacteria, is a good example.

– Indoles and urolithins: Emerging research points to their role in brain health.

The benefits of postbiotics
“Postbiotics are proving to be one of the most important ways the gut influences the body,” the nutritionist explains. They play a role in:

– Gut barrier integrity: The gut barrier is a new focus in gut health. It protects the “home” where your microbiota can thrive. Butyrate, in particular, helps keep the intestinal wall strong and healthy.and reduces its permeability.

Immune system efficiency: Postbiotics play a key role in training the immune system to respond correctly. Since about 70% of immune tissue is in the gut, postbiotics help it learn to tell the difference between harmful and harmless substances.

Metabolic health: Short-chain fatty acids (SCFAs) affect insulin sensitivity, appetite hormones, and fat metabolism. Research on acetate and propionate suggests these postbiotics may help prevent and manage metabolic diseases.

Anti-inflammatory action: Many postbiotics are strong anti-inflammatory agents, and their absence is linked to ongoing low-grade inflammation. Dysbiosis, which also impairs postbiotic production, is increasingly tied to the chronic low-grade inflammation behind many modern diseases.

Brain and mood: SCFAs and other postbiotic compounds communicate through the vagus nerve and influence neurotransmitter production, forming the gut-brain connection.

Postbiotic-Rich Foods

If you want to boost your postbiotic intake through diet, focus on foods high in fiber or fermented. Here’s Woodhurst’s advice on naturally increasing postbiotics in your gut:

– Miso
– Garlic
– Tempeh
– Kimchi
– Onions
– Asparagus
– Kefir

Here are more tips from the nutritionist for naturally increasing postbiotics in the gut:

– Eat a wide variety of plant fiber: Different high-fiber foods produce different postbiotics. Try to eat more than 30 different plant foods per week, including vegetables, fruits, legumes, whole grains, nuts, seeds, and herbs.
– Include resistant starch found in cooked and cooled potatoes, green bananas, oats, and legumes. This is fermented mainly into butyrate.
– Add fermented foods like live yogurt, kefir, sauerkraut, kimchi, miso, and tempeh. These provide live bacteria (probiotics) and some ready-made postbiotic compounds.
– Eat foods rich in polyphenols such as berries, olive oil, dark chocolate, coffee, and matcha.
– Cut back on ultra-processed foods—they change the bacterial populations that produce beneficial postbiotics. Over time, emulsifiers and additives can harm the gut barrier.
– Prioritize sleep: The gut repairs itself during sleep. Gut barrier health, microbial balance, and postbiotic production all depend on sleep quality.
– Manage stress: The microbiota is very sensitive to the nervous system. Chronic stress significantly reduces butyrate-producing bacteria.

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Frequently Asked Questions
Here is a list of FAQs about the 7 postbiotic foods that can support your gut health written in a natural helpful tone

1 What exactly are postbiotics Are they the same as probiotics
Answer No theyre different Probiotics are the live good bacteria you eat Prebiotics are the food for those bacteria Postbiotics are the helpful compounds that those bacteria create after they eat the prebiotics Think of postbiotics as the final beneficial byproduct

2 Wait so postbiotics are found in food I thought they were just made in my gut
Answer Youre right that your body makes them but you can also get them directly from certain foods These foods already contain those beneficial compounds from a fermentation process so you dont have to rely on your gut bacteria to make them

3 Can you just name the 7 foods I want to know what to buy
Answer Sure The 7 common postbioticrich foods are
1 Kimchi
2 Kefir
3 Sauerkraut
4 Miso
5 Tempeh
6 Sourdough bread
7 Cheese

4 How do these postbiotic foods actually help my gut
Answer They deliver powerful compounds directly to your gut lining For example they can help strengthen the gut barrier reduce inflammation and help your good gut bacteria thrive Its like giving your gut a direct dose of repair tools

5 I have a sensitive stomach Will these foods cause bloating or gas