Microplastics have become a growing environmental and public health concern. These particles are now found in air, water, soil, and many everyday products, and exposure occurs through food, drinking water, and inhalation.
But one of the biggest scientific challenges has been understanding what actually happens when microplastics enter the body.
A new study reported by Phys.org describes a breakthrough that may help answer that question: researchers have developed a method that allows scientists to visualize and track microplastics inside living organisms in real time.
Making the invisible visible
Researchers at the Tokyo University of Science, led by Associate Professor Masakazu Umezawa, created microplastic particles that contain fluorescent molecules. When exposed to advanced imaging techniques using near-infrared (NIR-II) light, the particles emit a signal that can be detected deep within tissues.
This innovation allows scientists to track microplastics as they move through biological systems, including how they are absorbed, transported, and potentially accumulate in organs.
Until now, most studies relied on analyzing tissue samples after exposure. That approach could confirm whether microplastics were present but could not reveal how the particles behave inside the body over time.
Real-time imaging could fundamentally change that.
Why this matters for human health
Microplastics have already been detected in human tissues such as blood, lungs, liver, and even the brain. However, scientists still know relatively little about the long-term biological effects of these particles.
Laboratory studies suggest that microplastics may contribute to biological responses such as:
- inflammation
- oxidative stress
- cellular damage
- disruption of hormonal systems
However, researchers emphasize that more evidence is needed before definitive conclusions about long-term health effects can be made.
By enabling researchers to observe how microplastics interact with cells, tissues, and organs in real time, the new imaging technique could help clarify these risks.
A step toward better understanding plastic pollution
Plastic production worldwide exceeds hundreds of millions of tons each year, and microscopic plastic particles are continuously released as products degrade in the environment.
Understanding how these particles behave inside living organisms is critical—not only for evaluating health risks but also for informing environmental policy and material innovation.
Tools that allow scientists to track microplastics dynamically may ultimately help identify which materials pose the greatest risks and guide the development of safer alternatives that do not fragment into persistent microplastics.
Sources
- Phys.org – Real-time imaging of microplastics in the body improves understanding of health risks
- Tokyo University of Science press release
- ScienceDaily – Scientists make microplastics glow to see what they do inside your body
- Stanford Medicine – Microplastics and our health
