25 Aug 2020 --- A new definition of synbiotics – a combination of pre- and probiotics – has been put forward by an expert panel from the International Scientific Association for Prebiotics and Probiotics (ISAPP). In a paper, the authors propose that the new definition is “a mixture comprising live microorganisms and substrate(s) selectively utilized by host microorganisms that confers a health benefit on the host.” The ISAPP panel emphasizes that the definition is designed to be inclusive and extends beyond the gut to include all parts of the body that harbor a community of microorganisms.