Lactobacillus jensenii is a species of probiotic bacteria naturally found in the healthy vaginal microbiome. Its use to support the female reproductive system is justified by scientific evidence, primarily in the context of maintaining vaginal health and preventing infections. Clinical studies and microbiome research have shown that L. jensenii, along with other Lactobacillus species, helps to maintain a low vaginal pH by producing lactic acid. This acidic environment inhibits the growth of pathogenic bacteria and yeast, such as Gardnerella vaginalis and Candida albicans, which are associated with bacterial vaginosis (BV) and yeast infections, respectively.

Research has demonstrated that women with higher levels of L. jensenii in their vaginal flora tend to have a lower risk of urogenital infections and better reproductive health outcomes. For example, a 2011 study published in the journal Microbes and Infection found that the presence of L. jensenii was associated with a reduced risk of BV. Additionally, some clinical trials have explored the use of probiotic supplements containing L. jensenii to restore healthy vaginal flora after antibiotic treatment or in women prone to recurrent infections, with promising results.

While more large-scale and long-term studies are needed, current scientific evidence supports the use of L. jensenii as a beneficial probiotic for the female reproductive system, particularly in maintaining vaginal health and preventing dysbiosis.