{"url":"https://whatshealthyandwhy.com/nail-polish-and-salons/nail-polish-and-salon-chemicals","path":"/nail-polish-and-salons/nail-polish-and-salon-chemicals","alternates":{"json":"https://whatshealthyandwhy.com/api/articles/nail-polish-and-salons/nail-polish-and-salon-chemicals.json","markdown":"https://whatshealthyandwhy.com/nail-polish-and-salons/nail-polish-and-salon-chemicals.md"},"topic":{"slug":"nail-polish-and-salons","name":"Nail Polish and Salons","url":"https://whatshealthyandwhy.com/nail-polish-and-salons"},"slug":"nail-polish-and-salon-chemicals","order":1,"title":"Nail Polish and Nail Salon Chemicals","question":"Are nail polish and salon chemicals a health risk?","answer":"Occasional polish use may carry little risk; salon workers have higher exposures, though evidence on actual disease is thin.","description":"What nail polish, gel manicures and salon air expose you to, what studies of nail technicians show, and how to lower your risk without giving up manicures.","confidence":2,"confidenceNote":"Exposure measurements are consistent across studies, but few studies link salon or polish exposure to disease, and consumer-level risk is inferred from urine markers in small samples.","evidenceSummary":{"rctCount":0,"observationalCount":7,"metaAnalysisCount":0,"totalParticipants":"4,000+ (most studies under 150 people)","replicated":true,"newestStudyYear":2026},"category":{"categoryTitle":"What's Harming You","categorySlug":"harming-you","subcategoryName":"Personal Care & Beauty","subcategorySlug":"personal-care","url":"https://whatshealthyandwhy.com/explore/harming-you/personal-care"},"actions":["Choose a salon with open doors or windows and fans, or paint nails by an open window: in 12 New York salons, airflow-compliant ones had half the solvent level [1].","Do not treat \"3-free\" or \"10-free\" labels as proof of clean air: all 20 polishes tested claimed \"3-free\", yet every one released formaldehyde and toluene when applied [2].","If you get gel manicures often, protect the backs of your hands from the UV lamp with UV-blocking gloves or sunscreen [3]."],"cautions":["Pregnant nail technicians, or those planning to be, should ask about ventilation, gloves and tasks: in California birth records, manicurists had higher odds of gestational diabetes and placenta previa [4].","Finger, eyelid or neck rash after gel or acrylic nails can be acrylate allergy: in an Amsterdam clinic, 97% of cases reacted to HEMA and 80% cleared after avoidance [5].","Technicians with headaches, cough or irritated eyes at work should report them. In a small Colorado survey of 20 workers, 70% had at least one work-related health issue [6]."],"simpleText":"Polish a few times a year probably carries little risk, but it is not zero: a breakdown product of a plasticizer called triphenyl phosphate rose nearly seven-fold in urine after volunteers painted their nails [7]. The bigger concern is for nail technicians, who breathe solvent vapors all day in salons that often miss ventilation standards [1]. \"Free-from\" labels do not guarantee clean air [2].","mediumText":"How it works\n\nWhat gets in, and how\n\nPolish is a mix of solvents, film-formers and plasticizers. Triphenyl phosphate (TPHP) can serve as a plasticizer. In ten polishes bought in stores, TPHP made up as much as 1.68% by weight in eight, including two that did not list it. In 26 volunteers, urinary levels of its breakdown product (DPHP) rose nearly seven-fold 10 to 14 hours after painting. When volunteers instead painted synthetic nails fixed to gloves, so polish never touched their own skin, the marker was significantly lower. That points to skin as the main route [7].\n\n\"Toxic trio\" and \"free-from\" claims\n\nMany brands dropped toluene, formaldehyde and dibutyl phthalate (DBP) and call themselves \"3-free\". In a chamber test of 20 such polishes by US occupational-health researchers, DBP and TPHP were not detected in any. Yet formaldehyde and toluene were measured in every one, with benzene also reported, while polish was applied to artificial nails [2]. Hazard and exposure differ: a few minutes of vapor at home is not the same as an eight-hour shift.\n\nSalon workers\n\n- Air. In six Colorado salons, indoor toluene ranged from 26.7 to 816 micrograms per cubic metre, and formaldehyde exceeded a US occupational recommendation in one salon [6].\n- Body burden. Blood toluene in ten Boston technicians more than doubled over a work shift (median 0.158 to 0.360 micrograms per litre) [8].\n- Ventilation and masks. Three in four of 12 New York City salons missed minimum outdoor airflow rules [1]. Workers' urinary TPHP and DPHP were higher after work, and masks lowered the amounts by about 77% [9].\n\nGel manicures\n\nGel polish is cured under a UV lamp [3] and often contains acrylates that can cause allergy [5]. Evidence that the lamps cause skin cancer is weak and the risk, if any, looks low [3].\n\nWhat to do\n\nCustomers: choose a ventilated salon, and an occasional manicure is not a reason for alarm. If you get gels often, protect your hands from the UV lamp [3]. Technicians: ventilation, gloves (skin is the main route for TPHP) and regularly replaced masks [7][9]. See also Formaldehyde and Phthalates.","deepText":"The evidence in detail\n\nPolish itself\n\nMendelsohn and colleagues tested ten polishes purchased in 2013 to 2014. TPHP reached up to 1.68% by weight in eight, two of which did not list it. Two groups totalling 26 volunteers gave 411 urine samples before and after painting with a polish containing 0.97% TPHP. DPHP rose nearly seven-fold at 10 to 14 hours (p < 0.001). In ten volunteers who painted their own nails and synthetic nails fixed to gloves on separate days, DPHP was significantly lower when the glove blocked skin contact [7]. The exposure test used one brand, measured a urine marker rather than disease, and cannot say what repeated use does.\n\nIn the chamber test of 20 \"n-free\" polishes, geometric mean formaldehyde ranged from 0.021 to 0.273 ppm per gram of polish, toluene from 0.068 to 0.534 and benzene from 0.076 to 0.752. Levels did not differ significantly between products [2]. No DBP or TPHP was found in any polish, so those claims held up; the formaldehyde and toluene claims did not.\n\nNail technicians\n\nThe Colorado study measured air in six salons and questioned 20 workers. Toluene ranged from 26.7 to 816 micrograms per cubic metre, benzene from 3.13 to 51.8, and formaldehyde from 5.32 to 20.6. Modeling a 20-year career, the authors estimated cancer risks above the US EPA's one-in-a-million benchmark for formaldehyde and benzene [6]. That is a modeled risk, not observed disease. In Boston, 10 technicians in seven salons had median airborne ethyl methacrylate of 240 and methyl methacrylate of 205 micrograms per cubic metre, and ventilation sometimes fell short of ASHRAE guidance [8].\n\nIn the New York City study, the average total volatile organic compounds level was 29 ppm (SD 25). Methyl methacrylate, toluene and ethyl acetate were low to undetectable. Salons that met airflow rules had half the VOC level of those that did not (16 versus 33 ppm) [1]. Workers in another study had urinary TPHP 5.2 times higher after work than before, and 19 and 13 times higher in two high-volume salons [9]. A scoping review of 42 studies, mostly with 20 to 150 workers, found inadequate ventilation in 71%, VOC levels above OSHA limits in some, and persistent methyl methacrylate despite an FDA ban. Only 17% examined exposure and health outcomes together [10].\n\nHealth outcomes\n\nCalifornia birth records from 1996 to 2009 showed little evidence of increased risk for most adverse birth outcomes in cosmetologists and manicurists. Small-for-gestational-age babies were more likely among Vietnamese manicurists (odds ratio 1.39; 95% CI 1.08 to 1.78). Manicurists had higher odds of gestational diabetes (1.28; 1.10 to 1.50) and placenta previa (1.46; 1.08 to 1.97) than the general population [4]. These are registry associations with no exposure data.\n\nGel nails and UV\n\nIn Amsterdam, acrylate nail cosmetics caused allergic contact dermatitis in 67 women, 1.6% of all patients and 2.3% of all women patch tested from 2015 to 2023. Of these, 97% reacted to HEMA, and 27% were professional stylists [5]. A systematic review of 12 reports covering 88 patients found allergy took on average 30 months to appear, and recorded three squamous cell carcinomas 11 to 15 years after UV exposure [11]. A review of nine studies, many case reports, judged the skin cancer risk low but poorly measured [3]. In cell cultures, UV nail dryer radiation caused oxidative DNA damage and dose-dependent mutations [12], though cell studies do not tell us what happens on a hand with a few minutes of exposure.\n\nWhere the evidence is thin\n\nNull or reassuring findings exist: most birth outcomes were not elevated [4], and several chemicals were barely detectable in New York salons [1]. No study follows ordinary customers for disease.\n\nBottom line\n\nConfidence 2 of 5. Exposure to solvents, TPHP and acrylates is real and measurable, and highest for technicians. Evidence of harm at customer levels is lacking. Ventilation and gloves are the practical levers.","deepTruncated":false,"references":[{"id":"1","title":"Occupational Exposure and Ventilation Assessment in New York City Nail Salons","authors":"Harrichandra A, Roelofs C, Pavilonis B","year":2020,"journal":"Ann Work Expo Health","pmid":"32266385","url":"https://pubmed.ncbi.nlm.nih.gov/32266385/"},{"id":"2","title":"Evaluation of chemical exposures generated from n-free nail polishes","authors":"Anderson KR, Callaway P, Virjii MA","year":2025,"journal":"J Occup Environ Hyg","pmid":"40327457","url":"https://pubmed.ncbi.nlm.nih.gov/40327457/"},{"id":"3","title":"A systematic review of the risk of cutaneous malignancy associated with ultraviolet nail lamps: what is the price of beauty?","authors":"Metko D, Mehta S, Mcmullen E, et al.","year":2024,"journal":"Eur J Dermatol","pmid":"38557455","url":"https://pubmed.ncbi.nlm.nih.gov/38557455/"},{"id":"4","title":"Adverse birth outcomes and maternal complications in licensed cosmetologists and manicurists in California","authors":"Quach T, Von Behren J, Goldberg D, et al.","year":2015,"journal":"Int Arch Occup Environ Health","pmid":"25501563","url":"https://pubmed.ncbi.nlm.nih.gov/25501563/"},{"id":"5","title":"Contact allergy to acrylate-containing nail cosmetics: A retrospective 8-year study","authors":"Steunebrink IM, de Groot A, Rustemeyer T","year":2024,"journal":"Contact Dermatitis","pmid":"38093676","url":"https://pubmed.ncbi.nlm.nih.gov/38093676/"},{"id":"6","title":"Occupational exposure to volatile organic compounds and health risks in Colorado nail salons","authors":"Lamplugh A, Harries M, Xiang F, et al.","year":2019,"journal":"Environ Pollut","pmid":"30933751","url":"https://pubmed.ncbi.nlm.nih.gov/30933751/"},{"id":"7","title":"Nail polish as a source of exposure to triphenyl phosphate","authors":"Mendelsohn E, Hagopian A, Hoffman K, et al.","year":2016,"journal":"Environ Int","pmid":"26485058","url":"https://pubmed.ncbi.nlm.nih.gov/26485058/"},{"id":"8","title":"Biological and environmental exposure monitoring of volatile organic compounds among nail technicians in the Greater Boston area","authors":"Ceballos DM, Craig J, Fu X, et al.","year":2019,"journal":"Indoor Air","pmid":"31112343","url":"https://pubmed.ncbi.nlm.nih.gov/31112343/"},{"id":"9","title":"Organophosphate ester exposure in nail salons: Health implications for workers","authors":"Jia T, Keller AA, Gao L, et al.","year":2024,"journal":"Environ Pollut","pmid":"39322103","url":"https://pubmed.ncbi.nlm.nih.gov/39322103/"},{"id":"10","title":"The nail salon workforce: a systematic scoping review of carcinogen exposure assessments, health outcome, and workforce intervention research","authors":"Begum TF, Wilson RT, Sarah L, et al.","year":2026,"journal":"Rev Environ Health","pmid":"41206212","url":"https://pubmed.ncbi.nlm.nih.gov/41206212/"},{"id":"11","title":"Side effects of gel nail polish: A systematic review","authors":"Litaiem N, Baklouti M, Zeglaoui F","year":2022,"journal":"Clin Dermatol","pmid":"35907576","url":"https://pubmed.ncbi.nlm.nih.gov/35907576/"},{"id":"12","title":"DNA damage and somatic mutations in mammalian cells after irradiation with a nail polish dryer","authors":"Zhivagui M, Hoda A, Valenzuela N, et al.","year":2023,"journal":"Nat Commun","pmid":"36650165","url":"https://pubmed.ncbi.nlm.nih.gov/36650165/"}],"wordCount":1064,"source":{"path":"src/content/topics/nail-polish-and-salons/nail-polish-and-salon-chemicals.md"},"citeAs":"“Are nail polish and salon chemicals a health risk?.” What's Healthy and Why. https://whatshealthyandwhy.com/nail-polish-and-salons/nail-polish-and-salon-chemicals","notice":"General information backed by peer-reviewed research, not medical advice."}