The International Scientific Association for Probiotics and Prebiotics (ISAPP) is an independent, nonprofit scientific organization that advances the study and responsible use of probiotics, prebiotics, and related microbiome interventions. ISAPP convenes academic and clinical experts to critically evaluate evidence, establish consensus definitions, and clarify best practices for research and product substantiation.
ISAPP publishes peer-reviewed consensus statements and guidelines—including widely cited definitions of probiotics, prebiotics, synbiotics, and postbiotics—hosts scientific meetings, and develops educational resources for scientists, healthcare professionals, regulators, and industry. Its work helps align terminology, study design, and labeling with current evidence, supporting transparent communication and informed decision-making across the food, nutrition, and health sectors.