Ingredient Repository · Ingredient

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Ingredient

Boric Acid

A medical-grade intravaginal suppository compound that helps restore acidic vaginal pH and flora balance.

What it is

Boric acid (H3BO3) is a weak inorganic acid used exclusively in intravaginal suppository formulations for localized vaginal hygiene and pH balance. It is derived from natural boron mineral deposits and refined to purified medical-grade standards. Formulated in gelatin or vegetable capsules for vaginal insertion, boric acid acts locally to buffer the vaginal lumen to a healthy acidic pH (3.8–4.5) and disrupt fungal biofilm structures.

Also known as: Medical-Grade Boric Acid, Hydrogen Borate

What it does

  • Helps restore and maintain optimal acidic vaginal pH (3.8–4.5) to support physiological microflora.
  • Disrupts pathogenic fungal cell walls and biofilm matrices locally without systemic side effects.
  • Provides targeted intravaginal hygiene support for recurrent vaginal discomfort and odor.

Amplified by probiotics

Boric acid is strictly a localized intravaginal suppository ingredient with no systemic absorption claims. Its primary physiological synergy occurs locally within the vaginal epithelium. By acidifying the vaginal lumen to an optimal pH of 3.8–4.5, boric acid creates an inhospitable environment for opportunistic pathogens like Candida albicans and Gardnerella vaginalis. This localized pH restoration works in direct harmony with vaginal Lactobacillus strains (such as L. gasseri and L. rhamnosus), which naturally produce lactic acid and hydrogen peroxide. Together, local pH acidification and probiotic colonization reinforce mucosal biofilm defenses and maintain healthy vaginal microflora balance.

Typical dose

600 mg intravaginally per suppository (14-day max cycle)

The evidence

Evidence: strong

Systematic reviews of clinical trials confirm that intravaginal boric acid suppositories achieve clinical cure rates of 80–90% in recurrent vulvovaginal candidiasis resistant to conventional azoles (Iavazzo 2011, J Womens Health). Clinical guidelines support its local vaginal use for rapid pH normalization and symptomatic relief (Powell 2011, J Womens Health).

  1. Iavazzo C, et al. Boric acid for a recurrent vulvovaginal candidiasis: the state of the art. J Womens Health (Larchmt). 2011;20(8):1245-1255. PubMed ↗

Safety & who should check first

STRICTLY FOR INTRAVAGINAL USE ONLY; HIGHLY TOXIC IF SWALLOWED OR TAKEN ORALLY. NEVER USE DURING PREGNANCY OR ON BROKEN VAGINAL MUCOSA. KEEP OUT OF REACH OF CHILDREN.