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Low-plastic diet reduced select urinary plastic-associated chemicals

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Research area:environment-climate

What the study found

The study found that a low-plastic intervention was linked to lower urinary levels of some plastic-associated chemicals, including mono-n-butyl phthalate, monobenzyl phthalate, and bisphenol A. The authors also report that foods with minimal or no contact with plastic had the broadest effect on chemical excretion.

Why the authors say this matters

The authors say the findings indicate that reducing food-related plastic touchpoints may lower exposure to plastic-associated chemicals. They also suggest this matters because everyday plastic use exposes people to these chemicals, which have been associated with risks to human health.

What the researchers tested

The researchers reported results from the Plastic Exposure Reduction Transforms Health Trial, which included an observational cohort of 211 Australian participants and a 7-day pilot randomized controlled trial in 60 participants. Intervention groups received plastic-free kitchenware, low-plastic personal-care products, and food sourced to minimize plastic contact, while the control group received no intervention.

What worked and what didn't

In the randomized trial, the intervention maintained daily energy intake while decreasing plastic exposure and lowering urinary mono-n-butyl phthalate, monobenzyl phthalate, and bisphenol A. The abstract says replacing low-plastic personal-care products alone independently decreased urinary mono-n-butyl phthalate, and the foods with minimal to no plastic contact produced the broadest effect on excretion. In the observational cohort, highly processed, plastic-packaged, and canned foods were important modifiable factors for urinary PAC metabolite levels, and higher di(2-ethylhexyl) phthalate metabolites were negatively associated with cardiometabolic biomarkers.

What to keep in mind

The randomized trial was short, lasting 7 days, and it was described as a pilot study. The abstract also does not provide detailed limitations beyond the available summary, and it does not state whether these results would persist over a longer period.

Key points

  • A 7-day low-plastic intervention reduced urinary levels of several plastic-associated chemicals.
  • The reported decreases included mono-n-butyl phthalate, monobenzyl phthalate, and bisphenol A.
  • Foods with minimal or no plastic contact had the broadest effect on chemical excretion.
  • Low-plastic personal-care products alone were linked to a decrease in urinary mono-n-butyl phthalate.
  • In the cohort study, highly processed, plastic-packaged, and canned foods were important modifiable factors for urinary PAC metabolite levels.

Disclosure

Research title:
Low-plastic diet reduced select urinary plastic-associated chemicals
Authors:
Amelia J. Harray, Andrew D. Lucas, Susan E. Herrmann, Philip S. Vlaskovsky, Ahmed Elagali, Bhedita J. Seewoo, Dick C. Chan, Davide Chiarugi, Rishabh Kulkarni, Michelle Trevenen, Xianyu Wang, Jochen Mueller, Kevin V. Thomas, Hannah Papendorf, Claire Miller, Silvana Gaudieri, Tony Smith, Sam Salman, Kevin Murray, Christos Symeonides, S R Dunlop, Gerald F. Watts, Jacob Warger, Kathryn L. Linge, Zaheerah Haywood, Andrea Vermeersch, Lydia Rock, Lelinh Duong, Kim Jarvie, Anna Henry, Tamsin Johnson, Amy Prosser, Alex H. Liu, Michaela Lucas
Institutions:
ChemCentre, Florey Institute of Neuroscience and Mental Health, Government of Western Australia Department of Health, Government of Western Australia Department of Health, Government of Western Australia Department of Health, Government of Western Australia Department of Health, Pathwest Laboratory Medicine, Pathwest Laboratory Medicine, Princess Margaret Hospital for Children, Royal Children's Hospital, Royal Perth Hospital, SIB Swiss Institute of Bioinformatics, Sir Charles Gairdner Hospital, Sir Charles Gairdner Hospital, The Kids Research Institute Australia, The University of Queensland, The University of Queensland, The University of Queensland, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia, The University of Western Australia
Publication date:
2026-04-21
DOI:
10.1038/s41591-026-04324-7
OpenAlex record:
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AI provenance: This post was generated by gpt-5.4-mini (OpenAI). The original authors did not write or review this post.

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