Vaginal Health Probiotics: What the Evidence Supports and What It Doesn't

Probiotics for vaginal health are sold as capsules, gummies and suppositories with promises of “pH balance,” “feminine freshness” and fewer infections. If you’ve had bacterial vaginosis (BV) or yeast infections more than once, it’s easy to see the appeal. Here is what the research supports so far, and where it stops.

For treating BV: not a replacement

CDC¹ treatment guidelines say studies of vaginal Lactobacillus and other probiotic products haven’t supported them as an add-on to, or a replacement for, standard BV treatment.¹ BV is treated with prescription antibiotics, and the CDC also recommends testing for HIV and other STIs when BV is diagnosed.¹

For preventing BV from coming back: promising, not settled

A 2022 analysis of 10 randomized trials with 1,234 women looked at probiotics given after standard antibiotic treatment. BV came back in about 15% of women who took probiotics, compared with about 26% in the comparison groups. The authors rated the evidence as moderate quality and called for more standardized trials.²

The CDC¹ describes a trial of one specific vaginal Lactobacillus crispatus product that cut BV recurrence at 12 weeks, but notes it isn’t yet FDA cleared or sold.¹ A product on the shelf with different strains, doses and forms may not perform the same way.

For yeast infections: little support

The CDC³ says there’s no substantial evidence supporting probiotics for treating vaginal yeast infections.³

For urinary tract infections

The National Center for Complementary and Integrative Health (NCCIH)⁴ cites a 2015 review of 9 studies that found no evidence that probiotics prevent UTIs.⁴

What the bottle may not tell you

• No approval before sale. Many probiotics are sold as dietary supplements, which don’t need FDA approval before they’re marketed.⁴
• Contents can differ. NCCIH notes that some probiotic products have been found to contain microorganisms not listed on the label.⁴
• Not for everyone. The risk of harm from probiotics is higher for people with serious illness or a weakened immune system.⁴

Before you buy

1. Get a diagnosis first. BV, yeast, trichomoniasis and other causes can look alike, and each needs different treatment.
2. Ask about recurrence. If BV keeps coming back, ask your clinician what prevention options fit you, including whether a probiotic is worth trying after treatment.
3. Skip douching. The CDC¹ says douching may raise the chance of BV coming back.¹

Try: “I’ve had BV twice this year. After treatment, is there anything that helps prevent it coming back, and would a probiotic be worth trying?”

Down There, Decoded includes a Down-There Log and a See script for appointments. Use them to track symptoms, treatments and recurrences, and to bring them to your visit. Explore the intimate-health playbook.