Probiotics, prebiotics, and postbiotics

They are not the same, but they work together. When we talk about gut health, probiotics, prebiotics and postbiotics are often mixed up. But understanding how they relate to each other can gently change the way we eat and how we feel. It’s not about memorising definitions. It’s about understanding a living system that functions best when we care for it consistently and calmly.

Probiotics are live microorganisms — often called “good bacteria.”
When present in adequate amounts, they help balance the gut microbiota and support smoother digestion. You’ll find them mainly in fermented foods like yogurt, kefir, sauerkraut, kombucha and miso.

Prebiotics are the food for those bacteria.
They’re fibers our body doesn’t digest, but that nourish probiotics and help them grow and stay active. Without prebiotics, probiotics can’t truly thrive. They’re naturally present in foods like garlic, onions, leeks, artichokes, slightly unripe bananas, oats and legumes.

Postbiotics are where much of the benefit actually happens.
They are the compounds produced when probiotics ferment prebiotics. These substances help strengthen the gut barrier, support the immune system, reduce inflammation and influence the gut–brain axis. Some examples include certain B vitamins and vitamin K.

Simply put:

Prebiotics → the food
Probiotics → the bacteria
Postbiotics → the beneficial outcome

And often, supporting all three starts with simple, everyday meals.