The presence of oral probiotics and food-based microbes in stool and vaginal samples indicate that ingested microbes can be transferred to the vagina (likely due to its proximity to the rectum).[1] In a few small studies, some women exhibited lower Candida colonization and had fewer episodes of VVC after eating yogurt each day for several months, but these results were inconsistent.[2]
Limited evidence suggests that diets low in sugary foods and beverages could be a protective factor, but without controlling for other variables, no firm conclusions can be drawn about the relationship between dietary sugar intake and VVC.[3]