Bacterial vaginosis (BV) is a frustrating yet common vaginal infection many people experience. Around 30% of people with vaginas get bacterial vaginosis every year and one of the things that makes it so frustrating is its habit of coming back — over and over again. 

While antibiotics are the standard treatment for bacterial vaginosis, recurrence rates remain high. Some studies report rates as high as 50% in six months after initial treatment, leaving many women searching for alternative remedies — including boric acid.

Boric acid has been around for a while, but it’s making a full-throttle comeback, promising to be the solution to vaginal infections. This begs the question: Can boric acid treat bacterial vaginosis? Keep reading to learn more.

What is bacterial vaginosis?

Bacterial vaginosis occurs due to an overgrowth of “bad” bacteria in the vaginal microbiome, such as Gardnerella vaginalis or Prevotella bivia. 

Factors like douching, unprotected sex, and hormonal changes can increase the risk of bacterial vaginosis. Bacterial vaginosis symptoms include: 

  • A thin, grayish-white vaginal discharge
  • A strong fishy odor (that often gets worse after having sex)
  • Occasional itching or a burning sensation.  

Treatment for bacterial vaginosis

The first-line treatment for bacterial vaginosis typically involves antibiotics such as metronidazole or clindamycin. While effective for many, these treatments often fail to provide long-term relief. Treating BV isn't as straightforward as you'd hope — certain BV-causing bacteria can be resistant to standard antibiotic treatment, partly because they can form something called a biofilm. Biofilms are protective structures that bacteria and fungi form to stay alive. That’s great news for them, but not so great news for you. 

Given these challenges, researchers and clinicians have explored other options — including boric acid — for the treatment of bacterial vaginosis.

What is boric acid?

Boric acid is a compound made from borax, a naturally occurring mineral. It’s composed of boron, oxygen, and hydrogen, and is widely recognized for its antifungal and antiviral properties. 

When used to address vaginal infections, boric acid comes in powder or capsule form and is inserted directly into the vagina as a suppository. 

While some women also use boric acid washes for vaginal odor and itching, these products are less regulated, and their effectiveness remains uncertain.

Does boric acid help BV?

Boric acid vaginal suppositories are a popular option for treating recurrent yeast infections, but when it comes to bacterial vaginosis, their effectiveness isn't as firmly established. 

Although it’s not FDA-approved specifically for bacterial vaginosis, many healthcare providers do prescribe it off-label, especially for women dealing with recurrent bacterial vaginosis, or when standard treatment just won’t cut it. 

Some research suggests that boric acid can be a helpful addition to antibiotic treatment for bacterial vaginosis. A study from 2009 found that participants who used boric acid alongside antibiotics had an impressive 87% success rate in staying symptom-free for 12 weeks, although about half experienced a return of symptoms within three months. A more recent study showed that 69% of patients remained symptom-free for six months. Interestingly, another study reported that 76.9% of patients using boric acid felt satisfied with their treatment. 

The Centers for Disease Control and Prevention (CDC) recommends a maintenance plan that includes using 600 mg of intravaginal boric acid daily for 21 days, plus applying metronidazole gel twice a week for four to six months. 

Boric acid can be particularly helpful if you’re dealing with antibiotic-resistant bacteria or if a biofilm has formed. For example, if your Evvy Vaginal Health Test shows biofilm-forming bacteria in your vaginal microbiome, adding boric acid to your treatment might improve your outcomes. Boric acid works to lower the vaginal pH and eliminate the biofilms that can shield bacteria, providing targeted relief for those struggling with recurrent BV symptoms.

If you’re thinking about using boric acid for bacterial vaginosis, it’s always a great idea to consult your healthcare provider first. That’s why Evvy’s Pue Boric Acid suppositories are prescribed by a provider and compounded at a 503a NABP-accredited pharmacy. A provider will review your Evvy Vaginal Health Test results and prescribe a custom prescription plan based on your unique microbiome. 

One way to determine if boric acid is working is by doing a vaginal microbiome test before and after treatment. Comparing test results can reveal whether your vaginal flora is shifting toward a healthier, more protective state. An Evvy membership, for example, allows you to track your progress over time.

Recurrent symptoms? Get Evvy's at-home vaginal microbiome test, designed by leading OB-GYNs.
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Are boric acid suppositories safe?

Boric acid suppositories are generally considered safe when used as directed. They’re designed solely for vaginal use and should never be ingested, as ingesting large amounts can be toxic. A typical boric acid suppository contains about 600 milligrams, a dose far below toxic levels when used properly.

Most women tolerate boric acid suppositories well, but some may experience side effects such as:

  • Vaginal irritation or itching
  • Burning sensations
  • A “gritty” feeling
  • Watery vaginal discharge.

Compared to over-the-counter options, prescription-grade boric acid (like Evvy’s Pure Boric Acid suppositories) is typically purer and less likely to cause adverse reactions. That said, pregnant women shouldn't use boric acid because its safety in pregnancy hasn't been studied.

While it’s not a cure-all, it may offer relief for women dealing with recurrent BV or those seeking alternatives to traditional antibiotics. As always, it’s best to work closely with your healthcare provider to find the safest and most effective solution for your needs. 

FAQ

How long does it take for boric acid to cure BV?

Boric acid can relieve symptoms within just a few days, especially when paired with antibiotics. One study found that 87% of patients stayed symptom-free 12 weeks after starting treatment with a week of antibiotics followed by a three-week routine of vaginal boric acid. Evvy’s Pure Boric Acid Suppositories are a great option for quick relief — with consistent use, many users notice improvements in odor and discomfort after just a few applications. Just keep in mind that everyone’s experience can be a bit different. For the best results, be sure to follow Evvy’s usage instructions, and don’t hesitate to reach out to a healthcare provider if your symptoms continue.

Can BV go away with boric acid?

Possibly! The evidence is promising, especially for cases of antibiotic-resistant or recurrent bacterial vaginosis. Studies have found that boric acid helps treat bacterial vaginosis and restore balance when used alongside antibiotics, or as a maintenance therapy, but more research is needed. 

Do doctors recommend boric acid for BV?

Yes, some doctors suggest using boric acid for bacterial vaginosis, particularly for those stubborn cases that don't respond to traditional treatment options. While boric acid isn't officially approved by the FDA for this purpose, many healthcare professionals have found it helpful based on their experiences and some research. It’s always good to discuss options with your doctor.