Low-plastic diets reduced select urinary plastic-associated chemicals

What the study found: Limiting plastic touchpoints in food and personal-care products was associated with lower urinary levels of some plastic-associated chemicals (PACs) over 7 days. The intervention maintained daily energy intake while reducing plastic exposure.
Why the authors say this matters: The study suggests that everyday plastic exposure may be reduced by changing how food and personal-care products are sourced and packaged, and that these changes can lower some urinary PAC levels.
What the researchers tested: The Plastic Exposure Reduction Transforms Health Trial 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 from more than 100 producers designed to minimize plastic contact from production to consumption; the control group received no intervention.
What worked and what didn't: In the cohort study, highly processed, plastic-packaged, and canned foods were important modifiable factors for urinary PAC metabolite levels, and higher urinary di(2-ethylhexyl) phthalate metabolites were negatively associated with cardiometabolic biomarkers. In the randomized trial, the intervention decreased plastic exposure and reduced urinary mono-n-butyl phthalate, monobenzyl phthalate, and bisphenol A by 37.5%, 53.5%, and 59.7%, respectively. Foods with minimal or no contact with plastic had the broadest effect on PAC excretion, and low-plastic personal-care products alone independently decreased urinary mono-n-butyl phthalate.
What to keep in mind: The trial was short, lasting 7 days, and the abstract does not describe longer-term outcomes. The abstract also does not provide detailed limitations beyond the study design and scope.

Key points

• A 7-day low-plastic intervention reduced urinary levels of mono-n-butyl phthalate, monobenzyl phthalate, and bisphenol A.
• The intervention maintained daily energy intake while lowering plastic exposure.
• Foods with minimal or no contact with plastic had the broadest effect on PAC excretion.
• Low-plastic personal-care products alone independently reduced urinary mono-n-butyl phthalate.
• In the cohort study, highly processed, plastic-packaged, and canned foods were linked to urinary PAC metabolite levels.