A new study led by the **University of Plymouth** revealed that **nanoplastics**, particles that measure just one **millionth of a centimeter**, can **penetrate crop roots** and accumulate in their **edible organs**.
The study, published in the journal *Environmental Research*, used **radishes grown in hydroponic systems** to demonstrate, for the first time, this pathway for **plastic contaminants** to enter the **food chain**.
## Exposed crops: absorption and accumulation of nanoplastics
**Up to 25% of the nanoplastics retained by the plant were found in its edible roots**
Scientists placed radishes in contact with a solution of **radiolabeled polystyrene nanoparticles**. After five days, they found that **almost 5% of the particles** were absorbed by the root system.
Of these, **a quarter** accumulated in the **edible fleshy roots**, and **10%** in the leaves. These results confirm that **crops can serve as vectors of plastic pollution**, with direct implications for **human and animal health**.
## Microplastics in agricultural soils: a silent threat
**Plastic pollution** extends from oceans to farmland.
Recent studies warn that **agricultural soils** are accumulating **microplastics and nanoplastics** from **plastic films used in mulching**, packaging, and other agricultural practices.
The **solar, microbial, and mechanical degradation** of these materials generates **persistent fragments** that alter the **physical and chemical properties of the soil**, release **toxic additives**, and act as carriers of **persistent organic pollutants**.
## Ecological and toxicological risks in the food chain
Microplastics can transport **heavy metals and pesticides** to the edible organs of plants.
According to research published in *Science of The Total Environment in June*, microplastics in the soil can **facilitate the entry of contaminants** into crops, leading to **bioaccumulation** in the food chain.
Although the precise level of absorption in humans has not yet been determined, recent studies have detected **microplastics in organs such as lungs, liver, placenta, and blood**, suggesting **chronic and prolonged exposure**.
## Food security and public health: an urgent agenda
The presence of **invisible plastics** in food demands new research and regulations.
The findings underscore the need to **deepen studies on plastic pollution in crops**, assess their **impacts on human health**, and establish **specific regulations** for the use of plastics in agriculture.
The evidence points to an **emerging food security issue** that requires **coordinated actions between science, policy, and agri-food production**.
