Fem-dophilus contains two patented and clinically proven probiotic strains, Lactobacillus GR-1 and Lactobacillus RC-14 discovered and developed by Dr. Gregor Reid and Dr. Andrew Bruce at Urex Biotech. More than 30 years of research supports the oral use of GR-1 and RC-14 to colonize and protect the vaginal and urinary tracts. Fem-dophilus also supports immune system health.