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Slippery Slope: What Your Vagina Wants You to Know About Lube

What’s Lube, Anyway?

Vaginal lubricants are gels or liquids that help reduce friction and ease dryness, something many people experience at some point in life. Vaginal dryness can be caused by menopause, breastfeeding, certain medications, or health conditions. [1] In fact, more than 65% of women in the U.S. say they have used a lubricant in the past month. [2] [3]

Why Some Lubes Cause Trouble

Lube is meant to make things more comfortable, but not all lubes are created equal. Many products on the market do not match the natural chemistry of the vagina. Research shows that some may even irritate or damage delicate vaginal tissue over time. [4]

pH and Osmolality: Two Words That Matter

Your vagina has its own ideal balance, and the wrong lube can throw it off.

  • pH: Healthy vaginal pH is slightly acidic, between 3.8 and 4.5. A lube that is too alkaline (high pH) can irritate tissue and make infections more likely. [5]
  • Osmolality: This measures how much a product pulls water from your cells. If a lube’s osmolality is too high, it can actually dehydrate vaginal tissue, even after one use. [6] [7] [8]

When pH or osmolality are off, your vaginal lining can become irritated or more vulnerable to infections, bacterial vaginosis, and sexually transmitted diseases. [9]

Ingredients to Watch Out For

Some lubes contain chemicals that do not belong anywhere near your vagina. These can cause irritation or increase infection risk.

  • Parabens (methyl-, propyl-): Preservatives linked to irritation and possible hormone disruption. [10] [11] [12] [13]
  • Chlorphenesin: An antibacterial that can irritate healthy skin. [14]
  • Capsicum extracts: Found in “warming” lubes; can cause burning or stinging. [15]
  • Fragrance, flavor, or aroma: These can hide dozens of undisclosed chemicals, including allergens and reproductive toxins. [16]

Ingredients to Watch Out For

Your vagina deserves better. Here’s how to find a product that is gentle and effective:

  • Look for pH of 3.8–4.5 and an osmolality below 380 mOsm/kg.
  • Skip unnecessary extras such as colors, scents, and “tingling” features that do not add health benefits.
  • Read the ingredient list and avoid harsh or mystery chemicals.
  • If you notice irritation, try a different brand. The wrong lube should not cause discomfort.
  • You can report problems with a product to the FDA or your state health department.

What About Silicone Lubes? 

Silicone-based lubricants do not contain water, so they do not have pH or osmolality concerns. That is good news. However, many include chemicals such as cyclopentasiloxane and cyclotetrasiloxane, which are restricted in the European Union because they can build up in the body and the environment. [17] There is still very little research on their long-term safety for vaginal use, so use them thoughtfully. [18]

October 2025

Download the Fact Sheet

Visit Weave’s first-of-its-kind national tool that lets you see what’s really in your water-based lubricants. Developed through research conducted by Weaving Voices for Health & Justice’s Director of Science and Research and Weavers Fellows, the database presents ingredients, pH, and osmolality data for more than 100 popular products.

Visit the Lubricant Safety Database

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[1] Edwards D and Panay N (2016) Treating vulvovaginal atrophy/genitourinary syndrome of menopause: how important is vaginal lubricant and moisturizer composition? Climacteric, Vol. 19, No. 2, pp. 151 –161. 2016

[2] Brown JM, Poirot E, Hess KL, Brown S, Vertucci M and Hezareh M. (2016) Motivations for Intravaginal Product Use among a Cohort of Women in Los Angeles. PLOS One. Vol. 11, No. 3. March 11, 2016.

[3] Herbenick D, Reece M, Schick V, Sanders SA and Fortenberry JD. (2014) Women’s use and perceptions of commercial lubricants: prevalence and characteristics in a nationally representative sample of American adults. Journal of Sexual Medicine. Vol. 11, No.3, pp: 642-652. March 2014.

[4] Wolf, KL (2012) Studies raise questions about safety of personal lubricants. Chemical and Engineering News. Vol. 90. No. 50, pp. 46-47. December 10, 2012.

[5] World Health Organization (2012) Use and procurement of additional lubricants for male and female condoms: WHO/UNFPA/FHI360 Advisory note. Department of Reproductive Health and Research. 2012. Available at: http://apps.who.int/iris/bitstream/10665/76580/1/WHO_RHR_12.33_eng.pdf

[6] Ayehunie S, Wang YY, Landry T, Bogojevic S, Cone RA. Hyperosmolal vaginal lubricants markedly reduce epithelial barrier properties in a three-dimensional vaginal epithelium model. Toxicol Rep. 2017 Dec 16;5:134-140.

[7] O’Hanlon DE, Brown SE, He X, Stennett CA, Robbins SJ, Johnston ED, Wnorowski AM, Mark K, Ravel J, Cone RA, Brotman RM. Observational cohort study of the effect of a single lubricant exposure during transvaginal ultrasound on cell-shedding from the vaginal epithelium. PLoS One. 2021 May 3;16(5):e0250153.

[8] World Health Organization (2012) Use and procurement of additional lubricants for male and female condoms: WHO/UNFPA/FHI360 Advisory note. Department of Reproductive Health and Research. 2012. Available at: http://apps.who.int/iris/bitstream/10665/76580/1/WHO_RHR_12.33_eng.pdf

[9] Pérez-Ibave DC, Burciaga-Flores CH, García-Mejía X, Alcorta-Nuñez F, Solis-Coronado O, Escamilla MG, Vidal-Gutiérrez O, Garza-Rodríguez ML. Hallmarks of Bacterial Vaginosis. Diagnostics (Basel). 2025 Apr 25;15(9):1090.

[10] Bauer, A, Geier, J and Elsner, P. (2000) Allergic Contact Dermatitis in Patients with Anogenital Complaints. The Journal of Reproductive Medicine. Vol. 45, No.8, pp:649-654. August 2000.

[11] Gali,Y, Delezay O, Brouwers J, Addad N, Augustijns P, Bourlet T, Hamzeh-Cognasse H, Arien KK, Pozzetto B and Vanham G. (2010) In Vitro Evaluation of Viability, Integrity, and Inflammation in Genital Epithelia upon Exposure to Pharmaceutical Excipients and Candidate Microbicides. Antimicrobial Agents and Chemotherapy, Vol. 54, No. 12, pp. 5105–5114. Dec. 2010.

[12] Darbre P.D. and Harvey P.W. (2008) Paraben esters: review of recent studies of endocrine toxicity, absorption, esterase and human exposure, and discussion of potential human health risks. Journal of Applied Toxicology. Vol. 28, No. 5, pp:561-578. July 2008.

[13] Smith, KW, Souter, I, Ehrlich,S, Williams, PL, Calafat, AM and Hauser, R. (2013) Urinary paraben concentrations and ovarian aging among women from a fertility center. Environmental Health Perspectives. Vol. 121, Issue 11-12, pp. 1299-1305. December 2013.

[14] NIH (National Institutes of Health) PubChem Compound Summary: Chlorphenesin. Available at: https://pubchem.ncbi.nlm.nih.gov/compound/Chlorphenesin

[15] Yenigun OM, Thanassi M. Capsaicin: An Uncommon Exposure and Unusual Treatment. Clin Pract Cases Emerg Med. 2019 May 20;3(3):219-221.

[16] Women’s Voices for the Earth (2015) Fragrance Chemicals of Concern Present on the IFRA List 2015. Available at: https://weavingvoices.org/fragrance-chemicals-of-concern-present-on-the-ifra-list-2015/

[17] ECHA (European Chemicals Agency) Cyclosiloxanes. Available at: https://echa.europa.eu/hot-topics/cyclosiloxanes

[18] SCCS (Scientific Committee on Consumer Safety) (2016) Opinion on decamethylcyclopentasiloxane (cyclopentasiloxane, D5) in cosmetic products, SCCS/1549/15, 25 March 2015, final version of 29 July 2016 Available at: http://ec.europa.eu/health//sites/health/files/scientific_committees/consumer_safety/docs/sccs_o_174.pdf