Happy V® Prebiotic + Probiotic Vaginal Health Supplements You may already know the importance of pre- and probiotics for gut health, but what about other ways that supplements can keep you healthy? Happy V® Probiotic + Prebiotic is formulated with lactobacillus, which is the most common beneficial bacteria found in the vaginal flora. There are literally TRILLIONS of these microorganisms that are essential allies in the fight against bacterial vaginosis, UTIs and yeast infections. Happy V® has chosen the most effective probiotic strains to support your vaginal wellness. Two of the strains chosen are Howaru Profem, which have been clinically proven to optimize vaginal pH and vaginal wellness.