Lactic Acid
A natural acid that helps maintain healthy vaginal pH levels.
Updated: August 20, 2026
What is Lactic?
Lactic acid is a naturally occurring organic acid that plays a crucial role in vaginal health. In a healthy vagina, beneficial Lactobacillus bacteria produce lactic acid, maintaining an acidic environment (pH 3.8-4.5) that protects against infections. Lubricants that include lactic acid are formulated to support this natural balance.
Many conventional lubricants have pH levels that are too high (alkaline) for vaginal use, which can disrupt the natural flora and increase susceptibility to bacterial vaginosis or yeast infections. pH-balanced lubricants with lactic acid are formulated to match the vagina's naturally acidic environment.
This is particularly important for users who experience recurrent infections or irritation. By choosing a lubricant with appropriate pH and ingredients like lactic acid, you support rather than disrupt your body's natural defenses.
Lactic acid is also used for its mild exfoliating and hydrating properties. It can help maintain healthy tissue turnover and support moisture retention. In lubricants designed for menopausal users, lactic acid may help address changes in vaginal pH that occur with declining estrogen levels.
Also Known As
Benefits
- Supports natural vaginal pH
- Promotes healthy vaginal flora
- Helps protect against infections
- Natural to the human body
- Supports healthy tissue
Concerns
- May cause stinging if tissue is already irritated
- Concentration must be appropriate for intimate use
Scientific Information
Lactic acid (C3H6O3) exists in two forms: L-lactic acid (produced by human metabolism and vaginal lactobacilli) and D-lactic acid. Vaginal lactic acid, predominantly the L-form, maintains acidic pH that inhibits pathogenic bacteria. Studies in Microbiome journal have shown that lactic acid has direct antimicrobial effects beyond pH, including membrane disruption of pathogens. The WHO and FDA recognize the importance of vaginal pH in sexual health, recommending lubricants with pH ≤4.5 for vaginal use. Lactic acid also has humectant properties, supporting tissue hydration.
Frequently Asked Questions About Lactic
Found In
- • Good Clean Love
- • Sliquid products
- • pH-balanced lubricants