Why does a probiotic contain fructooligosaccharides — is it just a flavouring? — Ultimate 16 probiotics with fructoligosaccharides capsules N60 – Swanson

According to the manufacturer's description, Swanson 16 Probiotics with FOS is a food supplement in capsule form that combines probiotic bacteria and fructooligosaccharides (FOS), which are used as ingredients in food supplements. Why FOS were added and how they work together with the bacteria is not explained on the product card, and there is no comparison with other probiotics there.

The exact composition, the recommended daily dose and the content of the active ingredients (including the list of the 16 cultures the name refers to) are given on the packaging. The pack contains 60 capsules. The supplement does not replace a complete and varied diet.