Probiotic Spectrum Fem is a unique probiotic formula designed to maintain a healthy vaginal microflora and support urogenital health. A healthy vaginal environment is mildly acidic, and thereforeLactobacillusspecies dominate this ecosystem. Ortho Biotic® Women’s provides two specific species ofLactobacilli: L. reuteriandL. rhamnosus. These two species are backed by human clinical studies to establish a healthy, stable vaginal ecosystem.