How do microplastics move through the food chain and end up on your plate?

What's actually in it

Microplastics are everywhere in the environment: in soil, rivers, oceans, and air. Crops absorb them through their roots. Livestock eat them in feed and water. Fish and shellfish ingest them in the ocean. By the time food reaches your kitchen, it has collected plastic particles from multiple sources along the way.

Then food processing and packaging add another layer. Washing, cutting, cooking, and wrapping in plastic all contribute more particles.

What the research says

A 2026 review in Food Res Int traced the full journey of microplastics through the food chain. The researchers mapped every point where plastic enters, from farm to fork.

At the base, soil and irrigation water contain microplastics from sewage sludge, plastic mulch, and atmospheric fallout. Crops like lettuce, carrots, and apples absorb these particles through their roots and carry them into the edible parts of the plant.

Animals accumulate microplastics from their feed and water. As you move up the food chain, concentrations increase. A cow eats contaminated grain. You eat the beef. The plastic particles concentrate at each step.

Seafood is especially high in microplastics because oceans are the final destination for much of the world's plastic waste. Shellfish that filter large volumes of water, like mussels and oysters, have the highest counts.

Choosing organic produce, reducing packaged foods, and eating lower on the food chain can all help reduce your microplastic intake.