A global study estimates that exposure to the plastic additive DEHP caused over 356,000 heart disease deaths in 2018, with most deaths occurring in rapidly industrializing regions.
A new analysis of global population data suggests that daily exposure to certain chemicals used in plastic household products may be linked to over 356,000 deaths from heart disease in 2018 alone.
The study focuses on phthalates, a group of chemicals widely used to make plastics more flexible. While these substances are found worldwide, regions such as the Middle East, South Asia, East Asia, and the Pacific accounted for approximately 75% of the total deaths linked to phthalate exposure.
Phthalates have long been associated with various health risks. Found in everyday products like cosmetics, cleaning agents, plastic packaging, piping, and insect repellents, they can break down into microscopic particles that enter the body through ingestion or inhalation. Research has linked phthalate exposure to conditions including obesity, diabetes, reproductive problems, and certain cancers.
This study, led by researchers at NYU Langone Health, specifically examined di-2-ethylhexyl phthalate (DEHP), a common phthalate used in food containers, IV tubing, and other flexible plastics. Prior research has shown that DEHP can trigger chronic inflammation in the arteries, which over time may lead to heart attacks or strokes.
Global Mortality and Economic Impact
In their new analysis, the authors estimated that DEHP exposure contributed to 356,238 deaths, or more than 13% of all global mortality from heart disease in 2018 among men and women ages 55 through 64.
“By highlighting the connection between phthalates and a leading cause of death across the world, our findings add to the vast body of evidence that these chemicals present a tremendous danger to human health,” said study lead author Sara Hyman, BS, an associate research scientist at NYU Grossman School of Medicine.
According to the authors, the resulting economic burden from the deaths identified in their study was estimated to be around $510 billion and may have reached as high as $3.74 trillion.
In a past study from 2021, the research team tied phthalates to more than 50,000 premature deaths each year, mostly from heart disease, among older Americans. Their latest investigation is believed to be the first global estimate to date of cardiovascular mortality — or indeed any health outcome — resulting from exposure to the chemicals, says Hyman, who is also a graduate student at NYU School of Public Global Health.
A report on the findings was recently published in the journal Lancet eBiomedicine.
How the Study Was Conducted
For the research, the team used health and environmental data from dozens of population surveys to estimate DEHP exposure across 200 countries and territories. The information included urine samples containing chemical breakdown products left by the plastic additive. Mortality data was obtained from the Institute for Health Metrics and Evaluation, a research group in the US that collects medical information worldwide to identify trends in public health.
Among the key findings, the study showed that losses in the combined region of East Asia and the Middle East and the combined region of East Asia and the Pacific accounted, respectively, for about 42% and 32% of the mortality from heart disease linked to DEHP. Specifically, India had the highest death count at 103,587 deaths, followed by China and Indonesia. The larger heart death risks in these populations held true even after the researchers adjusted their statistical analysis to take into account population size within the studied age group.
A possible explanation, the authors say, is that these countries face higher rates of exposure to the chemicals, possibly because they are undergoing a boom in plastic production but with fewer manufacturing restrictions than other regions.
Caveats and Future Research
“There is a clear disparity in which parts of the world bear the brunt of heightened heart risks from phthalates,” said study senior author Leonardo Trasande, MD, MPP. “Our results underscore the urgent need for global regulations to reduce exposure to these toxins, especially in areas most affected by rapid industrialization and plastic consumption,” added Trasande, the Jim G. Hendrick, MD, Professor of Pediatrics at NYU Grossman School of Medicine.
Trasande, who is also a professor in the Department of Population Health, cautions that the analysis was not designed to establish that DEHP directly or alone caused heart disease and that higher death risks did not take into account other types of phthalates. Nor did it include mortality among those in other age groups. As a result, the overall death toll from heart disease connected to these chemicals is likely much higher, he says.
Trasande says that the researchers next plan to track how reductions in phthalate exposure may, over time, affect global mortality rates, as well as to expand the study to other health concerns posed by the chemicals, such as preterm birth. Trasande also serves as director of NYU Grossman School of Medicine’s Division of Environmental Pediatrics and the Center for the Investigation of Environmental Hazards.
Reference: “Phthalate exposure from plastics and cardiovascular disease: global estimates of attributable mortality and years life lost” by Sara Hyman, Jonathan Acevedo, Chiara Giannarelli and Leonardo Trasande, 28 April 2025, eBioMedicine.
DOI: 10.1016/j.ebiom.2025.105730
Funding for the study was provided by National Institutes of Health grant P2CES033423. Further study funding was provided by Beyond Petrochemicals.
Trasande has received support for travel or meetings from the Endocrine Society, World Health Organization, the United Nations Environment Programme, Japan’s Environment and Health Ministries, and the American Academy of Pediatrics. He has also received royalties and licenses from Houghton Mifflin Harcourt, Audible, Paidós, and Kobunsha, and has served in leadership or fiduciary roles at Beautycounter, Ahimsa, Grassroots Environmental Education, and Footprint. None of these activities were related to the current study. The terms and conditions of all of these relationships are being managed by NYU Langone Health.
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