Phthalates are not one interchangeable hazard. Uses, metabolism and human evidence differ by compound. Urinary biomarkers usually reflect recent exposure rather than a stored body burden.[1] [2]
Name the compound and biomarker
DEP primarily produces MEP, while DEHP is represented by several metabolites. Evidence about DEHP, DBP or DINP should not be assigned automatically to DEP.
Sources are product-specific
Perfume use was associated with higher MEP in one study, which supports some fragranced products as a DEP route. It does not show that every fragrance contains DEP.[1]
Reproductive-development findings are inconsistent
A 2015 US cohort associated tenfold higher prenatal DEHP biomarkers with about 1 to 1.4 mm shorter male anogenital distance. A 2025 cohort did not reproduce a male association after multiple-testing correction. Neither study proves infertility.[2] [3]
Sperm-count trends do not identify a chemical cause
Global sperm-count trend estimates are methodologically contested, and a 2025 US-only review found no significant regional or fertility-subgroup trend. These studies did not measure phthalates and cannot identify a cause.[4] [5]
Reduce a known route
A three-day personal-care substitution lowered urinary MEP by 27.4%, but measured no health benefit. Choose fragrance-free products if lowering DEP exposure is your goal.[6]
Sources for this article
Each source below states the claim it supports and the limits of that evidence.
Parlett LE, Calafat AM, Swan SH. 2013. Women’s exposure to phthalates in relation to use of personal care products. Journal of Exposure Science & Environmental Epidemiology. DOI: 10.1038/jes.2012.105. PMID: 23168567.
Supports: Reported perfume use was associated with higher urinary MEP, a DEP metabolite. Self-report and one urine sample limit causal source attribution.
Evidence class: Human cross-sectional exposure study
Swan SH, Sathyanarayana S, Barrett ES, et al.. 2015. First trimester phthalate exposure and anogenital distance in newborns. Human Reproduction. DOI: 10.1093/humrep/deu363. PMID: 25697839.
Supports: First-trimester DEHP biomarkers were associated with about 1 to 1.4 mm shorter male anogenital distance. This marker is not infertility and the study was observational.
Evidence class: Human prospective observational cohort
Cajachagua-Torres KN, Salvi NB, Seok E, et al.. 2025. Prenatal phthalate exposure and anogenital distance in infants at 12 months. Environment International. DOI: 10.1016/j.envint.2025.109472. PMID: 40262489.
Supports: No male DEHP or DINP association survived multiple-testing correction in a 2025 cohort. Results differ across cohorts and measurement ages.
Evidence class: Human prospective observational cohort
Boulicault M, Perret M, Galka J, Borsa A, Gompers A, Reiches M, Richardson S. 2022. The future of sperm: a biovariability framework for understanding global sperm count trends. Human Fertility. DOI: 10.1080/14647273.2021.1917778. PMID: 33969777.
Supports: The critique identified heterogeneous populations, methods, imputed dates and an uncertain connection between average count trends and infertility.
Evidence class: Methodological critique
Lewis K, Cannarella R, Liu F, et al.. 2025. Sperm concentration remains stable among fertile American men: a systematic review and meta-analysis. Fertility and Sterility. DOI: 10.1016/j.fertnstert.2024.08.322. PMID: 39128669.
Supports: A US-only analysis found no significant trend by region or fertility subgroup. Neither this nor global trend work measured phthalates or identified a cause.
Evidence class: Human systematic review and meta-analysis
Harley KG, Kogut K, Madrigal DS, et al.. 2016. Reducing Phthalate, Paraben, and Phenol Exposure from Personal Care Products in Adolescent Girls: Findings from the HERMOSA Intervention Study. Environmental Health Perspectives. DOI: 10.1289/ehp.1510514. PMID: 26947464.
Supports: A three-day product substitution lowered selected urinary biomarkers, including MEP by 27.4%. It had no control group and measured no health benefit.
Evidence class: Human uncontrolled exposure-reduction intervention