Postbiotics are the beneficial compounds produced when your gut bacteria digest prebiotic fibres, plus, in supplement terms, preparations of inactivated (non-living) beneficial microbes and their by-products. If probiotics are the workers and prebiotics their food, postbiotics are the useful "products" left behind.

What exactly are postbiotics?

The word is newer, but the idea is simple. When your friendly gut bacteria ferment fibre, they release helpful substances, most notably short-chain fatty acids like butyrate, along with certain enzymes and cell fragments. Scientists have grouped these bioactive by-products, and preparations of deliberately inactivated beneficial microbes, under the term "postbiotics". Because they don't rely on keeping bacteria alive, postbiotics can be more stable than live probiotics, which is part of why they've attracted interest.

How are they different from pre- and probiotics?

Think of a simple chain. Prebiotics are the fibres that feed your good bacteria (found in foods like onions, garlic, oats and bananas). Probiotics are the live beneficial bacteria themselves (in fermented foods and supplements). Postbiotics are what results, the beneficial metabolites and inactivated microbial components produced along the way. All three are related parts of the same gut-health story rather than competing choices.

What does the science say so far?

Honesty matters here: postbiotics are an emerging area. Early research suggests they may play a role in supporting the gut lining and interacting with the immune system, and some studies have explored specific postbiotic preparations for digestive comfort. But the field is young, formulations vary, and it's too soon to make strong health claims. Postbiotics are best seen as a promising piece of gut science to watch, not a proven cure for anything.

How can you support postbiotic production naturally?

The most reliable way to get postbiotics is to help your own gut make them, by feeding your good bacteria well. That means eating a variety of fibre-rich plants, including fermented foods, and generally caring for your gut. A convenient daily habit can help round this out: our Daily Pre+Probiotic Melts combine prebiotics and probiotics to support a balanced microbiome, the foundation from which beneficial postbiotics are produced. As always, supplements support a good diet rather than replace it.

Should you buy a "postbiotic" supplement?

Given how new the category is, it's worth being a savvy shopper. Some products marketed as postbiotics have interesting research behind specific strains or compounds; others are riding a buzzword. If you're curious, look for transparency about what's actually inside, and don't expect miracles. For most people, feeding a healthy gut with fibre and fermented foods is the sensible starting point.

Frequently Asked Questions

Are postbiotics better than probiotics?

Not better, different. They're related parts of gut health. Postbiotics can be more shelf-stable, but probiotics and prebiotics remain valuable. The research on postbiotics is still developing.

Can I get postbiotics from food?

Your body makes postbiotics when gut bacteria ferment fibre, so a fibre-rich, varied diet with fermented foods is a natural way to support them.

Are postbiotics safe?

Postbiotic preparations are generally considered well tolerated, and because they're non-living, they may suit some people who react to live probiotics. If you have a health condition or are immunocompromised, check with a doctor first.

This article is general education and not medical advice. Please consult a qualified healthcare professional for guidance specific to you.