Microplastics are tiny plastic particles — smaller than five millimeters — that break off from larger plastic items through everyday use, heating, washing, and sun exposure. They are in our water, our food, our air, and our bodies. And research is showing that children are more exposed than adults.

A June 2025 study published in NPJ Science of Food found that common everyday actions — opening and closing bottle caps, microwaving food in plastic containers, even storing still-warm leftovers in plastic — release microplastics and nanoplastics directly into food and beverages. The researchers noted that the number of microplastics increases with each use. So those plastic plates going through the dishwasher hundreds of times? They are shedding particles into your child’s food a little more with each cycle.

Earlier research found that preparing infant formula in plastic bottles with hot water can release anywhere from one million to sixteen million microplastic particles per liter. Heating is the key accelerator — but even room-temperature use releases hundreds of thousands of particles.

Perhaps most concerning: a study of infant and adult feces found that infants had ten to twenty times more microplastics in their bodies than adults. Children’s developing bodies, combined with their higher intake of food and water relative to their size and their frequent hand-to-mouth behavior, make them disproportionately exposed.

Then came a sweeping 2025 review in The Lancet Child and Adolescent Health, led by Dr. Leonardo Trasande, which examined hundreds of studies involving pregnant women, babies, and children. The review found that plastic additives — phthalates, bisphenols, and PFAS — can disrupt hormones, trigger inflammation, and affect brain development, increasing lifelong risks of chronic conditions including endocrine disruption, infertility, asthma, diabetes, cancer, and heart disease. The researchers called plastic exposure an “urgent threat” to children’s lifelong health.

I do not share this to create panic. I share it because parents deserve the same information I have as a physician. And because the practical response is genuinely simple.

The American Academy of Pediatrics’ 2018 policy statement on food additives and child health includes specific, practical guidance for reducing children’s exposure to chemicals from food contact materials. Among the recommendations:

Avoid microwaving food or beverages in plastic containers. Avoid putting plastic containers in the dishwasher. Use alternatives to plastic, such as glass or stainless steel, when possible. Reduce the use of plastics with recycling codes 3, 6, and 7, which are more likely to contain bisphenols or phthalates.

The guidance is clear: when it comes to what touches your child’s food, stainless steel and glass are the materials the AAP points to as practical alternatives. Stainless steel, specifically, is durable, shatterproof, and does not leach chemicals — making it the most practical option for young children who drop, throw, and generally test the limits of every object they touch.

Here is something I realized once I made the switch in my own home: the “convenient” plastic plates are not actually convenient. They just feel that way because they are cheap upfront. Here is the real cycle:

You buy a set of colorful plastic plates for fifteen dollars. Within months, they are stained by tomato sauce, warped by the dishwasher, and developing a faint soapy smell that never quite washes away. Your toddler bites the edges. The colors fade. You notice the surface is scratched. You throw them out and buy new ones. Repeat every six to twelve months.

Over the course of your child’s first eight years, you will buy and discard four to eight sets of plastic dishes. That is forty to eighty plastic plates in a landfill. And every one of them was shedding microplastics into your child’s food from the first day.

Now consider the alternative. You buy one set of stainless steel plates. They go in the dishwasher ten thousand times without degrading. They do not stain, crack, warp, absorb odors, or leach chemicals. They do not develop a soapy taste. Your child uses the same plate at six months, at three years, and at eight years. The plate your baby learns to self-feed on is the plate your second grader packs lunch in. One purchase. No replacement cycle. No degradation.

Which is actually more convenient?

I call this a “system” because it follows the same framework I apply to everything in The Pediatrician Kitchen: make the better choice the easy choice, and let it compound.

The swap is simple. Replace the item that touches your child’s food most frequently — the plate they eat from three times a day — with stainless steel. That is it. You do not need to plastic-free your entire house. You do not need to throw away every container, cup, and utensil today. Start with the plate. It is the highest-contact, highest-frequency item in your child’s mealtime. It is the swap with the most impact per effort.

If you want to go further, here is the progression I recommended to families throughout my career as a pediatrician:

Start with the plate. Then the bowl. Then the cup — and while you are at it, skip the sippy cup entirely and go to an open cup, which is what pediatricians recommend for oral motor development. Then containers for snacks and lunch. Then utensils. Each swap takes one purchase. Each one compounds. Over a few months, your child’s entire mealtime is stainless steel — and every meal after that is a little safer.

I hear this question from parents, and it is a fair one. The honest answer is that we do not yet have a complete picture of the long-term health effects of microplastic exposure in children. The research is growing rapidly, but it is still relatively new.

What I told parents throughout my years as a pediatrician is this: we know microplastics are in children’s bodies at higher levels than adults. We know plastic additives are endocrine disruptors. We know the AAP recommends reducing plastic food contact. And we know that stainless steel does not leach anything. Given that the swap is easy, affordable over time (because you never replace it), and has zero downside — why would you not make it?

This is the same logic I applied to everything during my years in pediatric practice. If there is a simple change with clear potential benefit and no risk, we recommend it. We do not wait for the definitive study. We act on the precautionary principle and revisit as the science evolves. Seatbelts, car seats, back-to-sleep — all of these were recommended before we had decades of data. The principle is the same: when the precaution is easy and the potential benefit is large, you act.

• Microplastics shed from plastic plates with every use, every dishwasher cycle, and every warm meal. Children have 10–20x more microplastics in their bodies than adults.

• The AAP recommends reducing plastic food contact and points to stainless steel as a practical alternative. This guidance has been in place since 2018.

• The plastic plate cycle (buy, stain, crack, replace) is more expensive and less convenient than one stainless steel set that lasts through childhood.

• Start with the plate — the item that touches food three times a day. It is the highest-impact, lowest-effort swap. Then expand to bowls, cups, and containers.

• You do not need to plastic-free everything. One swap at a time. Every swap compounds.

• The better choice IS the convenient choice once you make it. That is the whole thesis.

References

1. American Academy of Pediatrics Council on Environmental Health. Food additives and child health. Pediatrics. 2018;142(2):e20181410. doi:10.1542/peds.2018-1410

2. Trasande L, Djordjevic AB, Fernandez MO. The effects of plastic exposures on children’s health and urgent opportunities for prevention. The Lancet Child & Adolescent Health. Published September 21, 2025.

3. Zimmermann L, et al. Food contact articles as source of micro- and nanoplastics: a systematic evidence map. NPJ Science of Food. 2025.

4. Li D, Shi Y, Yang L, et al. Microplastic release from the degradation of polypropylene feeding bottles during infant formula preparation. Nature Food. 2020;1:746–754.

5. Zhang J, Wang L, Trasande L, Kannan K. Occurrence of polyethylene terephthalate and polycarbonate microplastics in infant and adult feces. Environmental Science & Technology Letters. 2021;8(11):989–994.

6. Nationwide Children’s Hospital. Microplastics and your family’s health. 700 Children’s Blog. April 2025.

7. MADE SAFE certification standards. madesafe.org.

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.