Probiotics for Vaginal Health: Bacterial Vaginosis, Yeast Infections and What Trials Show

Start here: get the cause confirmed

Unusual vaginal discharge, itching or odor can come from bacterial vaginosis (BV), a yeast infection (thrush), a sexually transmitted infection or something else. The NHS (UK) says a clinician will want to confirm BV and rule out a sexually transmitted infection, and for thrush will confirm it and rule out other infections. [1][2] Treating the wrong condition with a supplement can delay the right care.

Ask a clinician sooner if you are pregnant or breastfeeding, have a weakened immune system or diabetes, are under 16 or over 60, or the problem keeps coming back. The NHS gives these as reasons to see a GP for thrush, and notes that BV in pregnancy carries a small chance of complications such as premature birth or miscarriage. [2][1] Do not stop or replace a prescribed antibiotic or antifungal with a probiotic. In a US emergency, call 911.

This page is information only.

What the conditions are, and how they are usually treated

• BV is caused by an imbalance of bacteria in the vagina. [1] About half of women with BV have no symptoms. [1] It is usually treated with antibiotic tablets, gels or creams, and it commonly comes back. [1]
• Thrush is a common yeast infection; the NHS says you will usually need antifungal medicine, and that thrush returning more than 4 times in 12 months is a reason to see a GP. [2]

The vaginal microbiome (the community of bacteria that normally lives there) is discussed in vaginal microbiome research. That research is why probiotics were tried; it does not by itself show a product works.

Oral products, vaginal products and drugs are different things

Trials have used probiotics taken by mouth, probiotics placed in the vagina, and combinations with antibiotics or antifungals. One review's meta-regression found the route (oral or vaginal) was not linked to recurrence, though that was a statistical comparison across trials, not a head-to-head test. [3] A product studied in a trial is also not the same as a supplement on a shelf; see how probiotics are regulated and probiotics vs microbiota-based medicines.

What the research found

Evidence labels: promising but limited, mixed, insufficient evidence. Amounts and strains in trials are study details, not advice.

Reading the table. The recurrence review pooled different products, and the Cochrane yeast review included only non-pregnant women without recurrent disease or immune problems. [3][6] The L. crispatus result is for that strain in that trial; it does not carry over to oral supplements or other strains. See why one strain's result does not transfer.

NCCIH and the NHS pages we read do not describe a probiotic role for BV or thrush; the NHS BV and thrush pages list antibiotics and antifungals as treatment. [1][2] A search of the sources above found no health-body statement recommending probiotics for either condition: Proper evidence not found.