Does Washing Rice Remove Microplastics? (Yes — Here's How Much)

Rice is one of the most-eaten foods on the planet — and like nearly everything else in the modern food supply, it now arrives with a small load of microplastics. The good news is that one of the easiest kitchen habits already does something about it. The catch is that two other common habits quietly undo the benefit. Here's what the research actually shows, in plain numbers.

Does rice contain microplastics?

Yes. A 2024 University of Queensland study led by Dr. Jake O'Brien detected microplastics in rice sold at retail. Plastic reaches the grains through contaminated soil, irrigation water, processing, and packaging. Instant and precooked rice carried noticeably more than plain dry rice.

This isn't unique to rice — microplastics now turn up across the food supply, from canned food to seafood to table salt. What makes rice notable is the volume people eat and how directly the packaging touches the food, especially in heat-and-eat formats. The contamination is real, but it's also one of the more controllable exposures, because most of it sits on the surface rather than locked inside each grain.

Does washing rice remove microplastics?

Yes. Rinsing rice before cooking removed roughly 20 to 40 percent of its microplastic contamination in the 2024 University of Queensland research. The rinse water physically carries away loose plastic particles sitting on the surface of the grains. It's the single easiest step you can take, though it doesn't remove everything.

Why it works: a lot of the microplastic on rice is surface contamination — particles picked up during processing, transport, and contact with packaging — rather than plastic embedded deep in the grain. Running the rice under water and swirling it through two or three changes of water loosens and flushes those surface particles down the drain. It's the same reason rinsing reduces surface starch and dust: you're washing off what's clinging to the outside.

Does cooking rice remove microplastics?

No. Cooking doesn't destroy or remove microplastics — and cooking in plastic can actually add them. Boiling rice in a glass or stainless steel pot is neutral. But heating rice in plastic instant-rice pouches or plastic microwave containers can shed extra plastic straight into your food, raising exposure instead of lowering it.

This is the part most people get backwards. They assume boiling "cleans" the rice. Heat does nothing to microplastic particles already present, and the high temperatures involved are exactly the conditions that make plastic more likely to shed. So a microwaveable rice cup or a boil-in-bag pouch is the worst-case combination: a heavily processed product, in plastic, heated directly. Plain rice rinsed and simmered in metal or glass is the best case.

Which rice has the most microplastics?

Instant and precooked rice carries the most. It's processed more, and it's typically sold in plastic pouches or cups that are often heated directly — stacking exposure on top of exposure. Plain dry rice, especially bought in bulk or paper/cloth packaging and rinsed before cooking, tends to carry the least.

The takeaway: the more processed and the more plastic-wrapped the rice — especially if that plastic gets heated — the higher the load. Buying plain dry rice and rinsing it is the cheapest, simplest way to land at the low end.

How should I cook rice to avoid microplastics?

Buy plain dry rice rather than instant pouches, rinse it two to three times until the water runs clearer, and cook it in a glass or stainless steel pot — never a plastic microwave pouch or container. Store any leftovers in glass. These few steps keep rice's microplastic load at its lowest.

Put together, the low-plastic rice routine looks like this:

• Choose loose, dry rice. Skip instant cups and boil-in-bag pouches. Bulk bins or paper packaging are ideal; a plastic bag of dry rice is still far better than a heat-and-eat plastic cup.
• Rinse 2–3 times. Swirl the rice in a bowl or fine strainer, pour off the cloudy water, and repeat until it runs noticeably clearer. This is your 20–40% reduction.
• Cook in glass or stainless steel. A metal pot, glass-lidded pot, or glass cooker insert — never a plastic pouch heated in boiling water or a plastic container in the microwave.
• Store leftovers in glass. Let rice cool slightly, then keep it in a glass container rather than reheating in plastic, which sheds more when hot.

None of this requires special equipment — but if your kitchen still leans on plastic storage and plastic-heavy cookware, that's where most of the residual exposure lives, not in the rice itself.

The honest verdict

Does washing rice remove microplastics? Yes — rinsing before cooking flushes away roughly 20–40% of the contamination, and it costs you nothing but 30 seconds at the sink. It's not a complete fix, because some plastic comes from soil and water rather than the surface, but it's one of the highest-return habits in the kitchen.

The bigger picture: the rinse only sticks if you don't add the plastic back. Skip the instant pouches, cook in glass or stainless steel, and store leftovers in glass instead of reheating in plastic. Do those three things and your daily plate of rice is about as low-plastic as a staple grain gets — and the same logic applies to nearly everything else you cook.