The invention provides composition comprising a therapeutically effective amount of a soluble fibre derivable from fruit of the Musa spp that may be used as a medicament for preventing or treating antibiotic associated diarrhoea (AAD). The soluble fibre is derivable from an aqueous solution decantable from homogenised fruit, and may be derived from boiling the fruit. The soluble fibre may be treated to remove starch. The compositions of the invention may be of use in treating AAD associated with C. difficile, and the therapeutically effective amount of soluble fibre may be an amount sufficient to inhibit adhesion of C. difficile. In addition to the compositions described above, the invention also provides a nutritional product for use in the prevention or treatment of antibiotic associated diarrhoea (AAD) comprising a therapeutically effective amount of a soluble fibre derivable from fruit of the Musa spp.
