The Fastest Way to Reduce Plastic Exposure Starts at Mealtime
|
|
Time to Read: 10 min
TL;DR
A new randomized controlled trial — the PERTH Trial, published in Nature Medicine — found that switching to food with minimal plastic contact lowered plastic-associated chemicals in the body by up to about 60% in just 7 days. The single biggest lever was food: how it is grown, processed, packaged, and served. These chemicals clear the body quickly, so every day of lower exposure counts. You cannot avoid all plastic, and you do not need to — but the kitchen is one of the fastest, most powerful places to make a difference, starting with what your child eats from and drinks out of
Years ago, before Ahimsa existed, the idea for it came from a grandmother’s simple instinct: that brightly colored plastic plates just did not feel right for the children she loved. As a pediatrician, I felt the same pull — and when the American Academy of Pediatrics released its 2018 policy statement on food additives, recommending glass and stainless steel over plastic for kids, that instinct had real backing. So I designed dishware I would feel good feeding my own three kids on.
Here is the thing about acting on conviction before all the proof is in: you spend a long time hoping the science will eventually catch up. This summer, it did — in a big way. A randomized controlled trial, the gold standard of evidence, just showed exactly how much, and how fast, changing the plastic around our food can lower the chemicals inside us. Let me put my doctor hat on and walk you through it, because it is genuinely good news.
About Ahimsa
Founded by a pediatrician and mom of three
Stainless steel is the only kid-friendly material recommended by the American Academy of Pediatrics
We are guided by a Scientific Advisory Council comprised of environmental and medical experts, guiding us in creating the safest products, following the latest science and promoting policy to protect human health and our planet
Want to know more? Check out our story and our products.
What did the study find?
Researchers ran a randomized controlled trial called the PERTH Trial — short for Plastic Exposure Reduction Transforms Health — and published it in Nature Medicine. They followed 60 adults. Some received food chosen to have little to no plastic contact at any stage, from growing to processing to packaging; some also swapped in plastic-free kitchenware and lower-plastic personal care products.
After only seven days, the results were striking:
The PERTH Trial: after 7 days
BPA (bisphenol A) levels dropped by about 60%.
One phthalate (monobenzyl phthalate) dropped by about 54%.
Another phthalate (mono-n-butyl phthalate) dropped by about 38%.
The biggest driver of the change was food — choosing options with minimal plastic contact from farm to plate.
A note in the spirit of honesty, because it matters to me: this trial measured the chemicals in people’s bodies, not long-term health outcomes, and it was done in adults. So the headline is not “this proves plastic-free dishes make your child healthier.” The headline is that exposure is something we can measurably lower, quickly — and that food contact is where the biggest change comes from. For a pediatrician, that is a hopeful, actionable finding.
Why should I care about these chemicals?
The two chemical families in question — bisphenols (like BPA) and phthalates — are what scientists call endocrine disruptors. That means they can interfere with the body’s hormone signaling. Across broader research (separate from this trial), higher exposure has been linked to concerns including effects on hormones, on brain development and attention in children, and on respiratory health such as childhood asthma, with associations to reproductive and metabolic health later in life.
Two things keep me calm rather than alarmed here. First, these are associations from population research, not a verdict on any one child. Second — and this is the empowering part — these chemicals do not build up permanently. The body clears them within hours to days. That is exactly why the PERTH Trial could show such a fast drop, and why your everyday choices have real leverage.
Children are worth a special mention. Pediatric researchers, including a 2025 review in The Lancet Child & Adolescent Health, have highlighted that kids can be more vulnerable to these exposures than adults — smaller bodies, developing systems, and more hand-to-mouth contact. That is the whole reason a pediatrician cares about something as ordinary as a plate.
Why is food contact the biggest lever?
This was the most useful finding in the whole study. Of all the changes people could make, the one that moved the needle most was reducing plastic contact with food itself — not just the packaging at the store, but the entire path from farm to plate, including what food is cooked, stored, reheated, and served in.
It makes intuitive sense. Heat, fat, and time are the conditions that coax chemicals out of plastic and into food — think hot leftovers in a plastic container, or a plastic plate under a warm meal, day after day. Your child eats multiple times a day, every single day. Small exposures at each meal add up; so do small reductions. That repetition is exactly why the dishes and containers you use are not a trivial detail — they are one of the most frequent points of contact in the whole system.
Plastic-Free Mealtime Essentials
What can I change today?
You do not need to overhaul your life this weekend. The research is clear that food comes first, and that even a few swaps help. Start here:
Serve and store food in glass, ceramic, or stainless steel instead of plastic — this is the highest-leverage, most repeated change.
Never microwave food in plastic or under plastic wrap; heat is what drives chemicals into food.
Choose fresh, whole foods over heavily packaged ones when you can, and favor glass jars over cans when it is easy.
Use a stainless steel or glass water bottle, and skip plastic bottles that have sat in a hot car.
Pick “fragrance-free” or “phthalate-free” soaps and lotions — “fragrance” on a label can hide phthalates.
And please hear this clearly: you cannot eliminate all plastic, and you have not failed by having it in your home. Plastic is woven through modern life. The goal is not perfection — it is lowering exposure where it is easiest and most frequent, and feeling good about the progress you make.
“We built Ahimsa on a simple belief — that what a child eats off of matters. This trial is the proof I always hoped for: change the plastic touching our food, and the chemicals in the body fall within a week.”
When I look at this study, I do not feel vindicated so much as relieved — relieved that a change so many of us made on instinct turns out to be one of the most effective, and fastest, we can make. The plate, the bowl, the cup your child uses at breakfast, lunch, dinner, and every snack in between is not a small thing. It is the most repeated point of contact between your child and their food.
Frequently asked questions
How can I reduce plastic chemicals in my body?
Start with food: serve and store it in glass, ceramic, or stainless steel; never microwave in plastic; and favor fresh foods over heavily packaged ones. The PERTH Trial found these food-focused changes had the biggest effect, lowering plastic chemicals up to about 60% in a week.
How fast can BPA leave your body?
Quickly. BPA and phthalates are cleared within hours to days rather than stored long-term. In the PERTH Trial, BPA levels fell by roughly 60% after just seven days of a low-plastic diet.
Are plastic dishes safe for my kids?
Plastic dishes can transfer small amounts of chemicals into food, especially with heat, fat, and repeated use. The American Academy of Pediatrics recommended glass and stainless steel over plastic for children in its 2018 food-additives policy statement. Reducing plastic food contact is a reasonable, evidence-informed step.
Do I have to get rid of all my plastic?
No — and you could not fully, since plastic is everywhere. The research shows food contact matters most and that even a few swaps help. Focus on the highest-reach changes first, like dishes, food storage, and not microwaving in plastic.
Key takeaways
- A randomized trial (the PERTH Trial, Nature Medicine) found plastic chemicals dropped up to ~60% in 7 days.
- Food contact — farm to plate, including what food is served in — was the single biggest lever.
- These chemicals clear the body in hours to days, so every day of lower exposure counts.
- The trial measured chemical levels in adults, not health outcomes — but the leverage is real and fast.
- You cannot avoid all plastic; aim for the easiest, most frequent swaps — starting with dishes and storage.
- What your child eats off of, multiple times a day, is one of the highest-reach changes you can make.
A note from Dr. M — building the balanced plate
This is exactly why I made Ahimsa what it is: safe, durable stainless steel dishware — plates, bowls, and cups — designed for the food contact that happens dozens of times a week in your home. I cannot promise you a health outcome, and I would never try to. What I can tell you is what the science now supports: reducing the plastic that touches your child’s food is one of the simplest, highest-reach changes you can make, and it touches every meal. To me, that makes plastic-free dishware less of a purchase and more of an everyday investment in a lower-plastic childhood — one that lasts for years and gets passed down. Stainless steel is also the material the American Academy of Pediatrics pointed to over plastic back in 2018.
Shop Ahimsa dishes at ahimsahome.com.
References
This article is grounded in the PERTH Trial and the following authoritative sources:
Harray AJ, Lucas AD, Herrmann SE, et al. Low-Plastic Diet and Urinary Levels of Plastic-Associated Phthalates and Bisphenols: The Randomized Controlled PERTH Trial. Nature Medicine. 2026. doi:10.1038/s41591-026-04324-7.
Woodruff TJ. Health Effects of Fossil Fuel–Derived Endocrine Disruptors. New England Journal of Medicine. 2024;390(10):922–933. doi:10.1056/NEJMra2300476.
Trasande L, Đorđević AB, Fernandez MO. The Effects of Plastic Exposures on Children’s Health and Urgent Opportunities for Prevention. The Lancet Child & Adolescent Health. 2025;9(11):796–807. doi:10.1016/S2352-4642(25)00212-3.
Committee on Obstetric Practice. Reducing Prenatal Exposure to Toxic Environmental Agents (ACOG Committee Opinion No. 832). Obstetrics & Gynecology. 2021;138(1):e40–e54. doi:10.1097/AOG.0000000000004449.
Voelker R. What Are Microplastics? JAMA. 2026. doi:10.1001/jama.2025.25534.
American Academy of Pediatrics (2018) — policy statement on food additives and child health (recommends glass and stainless steel over plastic).
Medical Disclaimer
This content is for informational purposes only and does not constitute medical advice or establish a physician-patient relationship. Every child is different. If you have concerns about your child’s eating, growth, or nutrition, please consult your pediatrician for personalized guidance.
About the Author
Dr. Manasa Mantravadi is a board-certified pediatrician, culinary medicine specialist, and founder of Ahimsa, the first pediatrician-designed stainless steel children's dishware brand. Raising three kids and being a pediatrician has taught her that food is love, food is health, and food is joy.
Dr. Manasa Mantravadi is a board-certified pediatrician whose dedication to children’s health drove her to launch Ahimsa, the world's first colorful stainless steel dishes for kids. She was motivated by the American Academy of Pediatrics’ findings on harmful chemicals in plastic affecting children's well-being. Ahimsa has gained widespread recognition and been featured in media outlets such as Parents Magazine, the Today Show, The Oprah Magazine, and more.
Dr. Mantravadi received the esteemed “Physician Mentor of the Year” award at Indiana University School of Medicine in 2019. She was also named a Forbes Next 1000 Entrepreneur in 2021, with her inspiring story showcased on Good Morning America. She serves on the Council for Environmental Health and Climate Change and the Council for School Health at The American Academy of Pediatrics. She represents Ahimsa as a U.S. industry stakeholder on the Intergovernmental Negotiating Committee (INC) for the Global Plastics Treaty, led by the United Nations Environment Program. Dr. Mantravadi leads Ahimsa's social impact program, The Conscious Cafeteria Project, to reduce carbon emissions and safeguard student health as part of a national pilot of the Clinton Global Initiative.
She is dedicated to educating and empowering people to make healthier, more environmentally friendly choices at mealtime. Her mission remains to advocate for the health of all children and the one planet we will leave behind for them through real policy change within our food system.
Dr. Manasa Mantravadi
Dr. Manasa Mantravadi is a board-certified pediatrician whose dedication to children’s health drove her to launch Ahimsa, the world's first colorful stainless steel dishes for kids. She was motivated by the American Academy of Pediatrics’ findings on harmful chemicals in plastic affecting children's well-being. Ahimsa has gained widespread recognition and been featured in media outlets such as Parents Magazine, the Today Show, The Oprah Magazine, and more.
Dr. Mantravadi received the esteemed “Physician Mentor of the Year” award at Indiana University School of Medicine in 2019. She was also named a Forbes Next 1000 Entrepreneur in 2021, with her inspiring story showcased on Good Morning America. She serves on the Council for Environmental Health and Climate Change and the Council for School Health at The American Academy of Pediatrics. She represents Ahimsa as a U.S. industry stakeholder on the Intergovernmental Negotiating Committee (INC) for the Global Plastics Treaty, led by the United Nations Environment Program. Dr. Mantravadi leads Ahimsa's social impact program, The Conscious Cafeteria Project, to reduce carbon emissions and safeguard student health as part of a national pilot of the Clinton Global Initiative.
She is dedicated to educating and empowering people to make healthier, more environmentally friendly choices at mealtime. Her mission remains to advocate for the health of all children and the one planet we will leave behind for them through real policy change within our food system.
