Most 'Probiotic' Foods Aren't Actually Probiotic | Dr Maria Marco

Dr Maria Marco, a food microbiologist at UC Davis and President of the International Scientific Association for Probiotics and Prebiotics, discusses how little we can actually measure about gut health despite the marketing hype. She explains why many fermented foods labeled as probiotic are misleading, how commercial microbiome tests often lack clinical meaning, and whether the microbes in yogurt truly survive digestion. The conversation also explores the surprising potential benefits of dead or pasteurized microbes and offers practical tips for choosing a probiotic that has been tested in actual human studies.