Are microplastics in pee coming from the kidneys themselves?

What's actually in it

We are constantly exposed to microplastics and nanoplastics (tiny plastic particles) through the air we breathe, the water we drink, and the food we eat. Once these particles enter your bloodstream, they don't just disappear. They travel throughout your body and can settle in your organs.

The kidneys act as the body's filter. Because they process large volumes of blood to remove waste, they are a primary site where these plastic particles can get trapped. When these particles accumulate in the kidney tissue, they can eventually be shed into the urine.

What the research says

A 2026 study in Nephrol Dial Transplant highlights the growing concern regarding the effects of these plastics on kidney health. The research shows that microplastics and nanoplastics are not just passing through the system. They have the potential to accumulate within the kidneys, which can lead to negative health outcomes.

This peer-reviewed study confirms that the kidneys are a target organ for plastic pollution. Because the kidneys are responsible for filtering the blood, they are directly exposed to the particles we ingest or inhale every day.