In connection with probiotics, so-called prebiotics are also often mentioned. Prebiotics are basically an indigestible component of the diet, which act as "food" for friendly bacteria - for probiotics - and creates suitable conditions for their proper growth and activity. This is essential for the health of the microbiome.

Prebiotics are found mainly in cereal, fruits, legumes and vegetables like garlic, onion, asparagus, leek.