A slice of my exchange with Dr. Gregor Reid, a world-renowned microbiologist and the scientist who defined “probiotics” for the UN/WHO. We discussed the transformative potential of probiotics on human health and environmental preservation and the challenges faced in bringing these beneficial microbes to mainstream use. Dr. Reid shared his journey of perseverance in the face of skepticism and provided a roadmap for future research. This includes the need for more human studies, the importance of