Effects and Mechanisms of Lactobacillus Probiotics in Maintaining Women’s Vaginal Health: A Review

Abstract

Probiotics are beneficial living microorganisms. They are useful to vaginal health when consumed in suitable doses. The dominant species included in probiotics are Lactobacillus. We can get these microbes naturally or commercially utilize them as functional food. Lactobacillus species form 70% of inhabitant bacteria in females compared to other warm-blooded animals. The prevalent Lactobacillus species are L. crispatus, L. gasseri, L. iners and L. jensenii. Because of the development of antibiotic resistance mechanisms, the beneficial relationship between humans and probiotics has been discussed for several years. Lactobacillus prevents the attachment of pathogens by using several mechanisms, for example, by increasing estrogen levels, production of lactic acid, lowering pH 4.0-4.5 to provide an acidic environment, release of hydrogen peroxide, bacteriocins and bacteriocins-like substances, adhesion and colonization properties. Lactobacillus prevent the entry and attachment of pathogenic bacteria, thus not only helping to control and manage different gynecological conditions like bacterial vaginosis, endometriosis, vulvovaginal candidiasis and genitourinary syndrome of menopause but also infections that can spread through sexual contacts such as gonorrhea, chlamydia, genital herpes, Human papillomavirus infections (HPV). Overall, the use of probiotics in improving vaginal health is beneficial, easy and cost-effective but the use of probiotics in HPV clearance is not quite beneficial. So, more work should be done on HPV preventive vaccines.