Microplastics Found in Human Blood for the First Time

Microplastics Found in Human Blood for the First Time: What You Need to Know 

A groundbreaking study has confirmed for the first time that microplastics—tiny plastic particles previously found in oceans, food, and even human feces—can also be detected in human blood. 

Researchers from Vrije Universiteit Amsterdam discovered plastic particles in the blood samples of 17 out of 22 volunteers, marking a new and unsettling milestone in environmental health research. 

Microplastics are plastic particles that are typically smaller than 5 millimeters in size. They originate from the breakdown of larger plastic waste or are directly manufactured at microscopic sizes—such as microbeads found in cosmetics or synthetic fibers from clothing.

They have now been found from ocean depths to mountain peaks, and increasingly, in the human body.

How Did They Detect Microplastics in Blood?

Detecting microplastics in blood is incredibly complex, especially because common laboratory tools themselves often contain plastic. To avoid contamination, the researchers used custom-made glass and metal equipment during their tests.

Despite these precautions, they found:

PET plastic (commonly used in water bottles) in about 50% of the samples

Polystyrene (used in food packaging) in approximately one-third of the samples

These particles measured as small as 700 nanometers, which is smaller than most bacteria.

How Do Microplastics Enter Our Bodies?

Previous studies have shown microplastics in:

Food and drinking water

Airborne particles inhaled into the lungs

Human feces and even placentas

Infant stool, where levels were found to be 10 times higher than adults, likely due to feeding from plastic bottles

This latest discovery adds blood to the list—suggesting that microplastics can travel through the human body, potentially reaching various organs and tissues.

Should We Be Worried? 

That’s the question scientists are now racing to answer. 

Prof. Marja Lamoree, an analytical chemist involved in the study, explained it with an analogy on Dutch radio: 

“It’s like seeing a polar bear from a boat. At a distance, it seems harmless. But if you’re suddenly face-to-face, the situation changes.” 

In other words, just detecting microplastics isn’t enough to declare a health threat. Two factors matter: 

1. Exposure – Are humans regularly exposed to microplastics? (This study says: yes.) 

1. Impact – What do these particles actually do inside the human body? (Still unknown.) 

What Does Existing Research Say?

Previous lab studies—including those from Utrecht University—suggest that microplastics can damage human cells, potentially causing inflammation or other issues. However, real-world exposure is more complex and harder to measure.

Researchers say longer-term studies are urgently needed to determine:

Whether the body naturally clears out these particles over time

If microplastics accumulate in specific organs

How they interact with immune and vascular systems

As Prof. Lamoree notes:

“Every answer opens ten more questions.”

Few more words

The discovery of microplastics in human blood is a wake-up call. While the health effects are not yet fully understood, the fact that plastic is now inside us—not just around us—highlights the urgent need for deeper research, plastic pollution reform, and personal awareness.

Kaynak: Nos.nl