Provided herein is an orally administrable formulation for promoting gastrointestinal health, the formulation including a plurality of plant-based polyphenol sources and/or one or more components or derivatives thereof together with one or more of a fibre source, a sweetening agent and/or a flavouring agent as well as methods of making same. Methods of using the orally administrable formulation in promoting gastrointestinal health, modulating microbial flora in a subject's gastrointestinal tract and the treatment of a gastrointestinal disease, disorder or condition are also provided.