Scientists have documented the presence of microplastics in various environments, including oceans, soils, air, drinking water, and food, for over a decade. Recent peer-reviewed studies have also identified microplastics in the human body. Cassandra Rauert, an environmental chemist at the University of Queensland, is researching the impacts of microplastics on human health. Her work indicates that current detection methods for microplastics may be contaminated by lab equipment, leading to potentially overestimated levels of microplastics in humans.
In an interview, Rauert explained that her team rebuilt their lab using materials like glass and steel to minimize contamination risks. She noted that there is insufficient evidence regarding the health effects of microplastics and criticized the claim that individuals consume a credit card's worth of plastic each week as unfounded.
Rauert highlighted the challenges in studying microplastics, including the difficulty in accurately measuring them due to contamination from lab materials and the ubiquity of plastics in everyday life. She emphasized the need for improved analytical techniques to understand the types and sizes of plastics entering the human body.
The research also points to household sources of plastic exposure, such as synthetic fibers from clothing and plastic kitchen utensils. Rauert called for further investigation into the health impacts of microplastics and the need for regulatory measures to reduce plastic use, acknowledging the known risks associated with chemicals in plastics.
Overall, while the presence of microplastics in the human body is documented, the specific health effects and pathways of exposure remain areas requiring further research.