Explainer
Microplastics urine test: what the research shows
Of all the ways to look for microplastics in the body, urine is the most accessible — no blood draw, no clinic. Researchers have already found microplastic particles there. Here's what the studies show, and why there's no reliable at-home urine test.
What the research found
Urine is a newer frontier than blood or stool, but the evidence is arriving. In 2024, researchers reported microplastics in human urine and kidney tissue using micro-Raman spectroscopy. In 2025, a separate group quantified micro- and nanoplastics in the urine of volunteers using double-shot pyrolysis GC/MS, identifying common consumer polymers — PET, polypropylene, polyethylene, polystyrene.
These are small studies with specialized instruments. They establish that microplastics can be detected in urine — they do not establish a normal range or a health meaning. The field is young.
Note the size: the particles small enough to be filtered through the body and cleared in urine skew toward nanoplastics — under 1 µm, the same range that crosses into blood and tissue. Resolving them takes lab-grade py-GC/MS or Raman work, not a home filter. Why nanoplastics are the fraction that reaches the body.
Why urine is the accessible sample
A blood test needs a draw and careful handling. Tissue needs a biopsy. Urine, by contrast, is something anyone can collect at home with zero equipment. That accessibility is exactly why it's an interesting sample for citizen science — and why almost no consumer microplastic particle test for urine has existed until recently. It's open ground.
Why we don't sell a urine test
Detecting microplastics in a biological sample like urine is genuinely hard: it's a protein- and lipid-rich matrix where a screening stain like Nile Red picks up far more non-plastic material than it does in water, and reliable results need lab spectroscopy and contamination-controlled handling. That's not something a $50 at-home kit can deliver honestly.
So we don't offer one. The sample worth testing at home is the one you can actually do something about — your drinking water.
Start with what you can control — your water
There's no at-home test for microplastics in your body, but you can test your drinking water. The $50 at-home kit counts microplastic particles in about 15 minutes.
Frequently asked
Can you test urine for microplastics?
Researchers have detected and quantified microplastic particles in human urine using lab instruments such as micro-Raman spectroscopy and pyrolysis GC/MS. There is no at-home consumer test for microplastics in urine, and we don't sell one. What you can test at home is your drinking water — the source you actually control.
Why test urine instead of blood?
Urine is the most accessible sample a person can provide — no blood draw, no clinic. It is also a route the body uses to clear small particles, which makes it a scientifically interesting sample. That said, like every body sample, a urine particle count has no established 'normal' range and no health interpretation.
Is there an at-home microplastics urine test?
No. Detecting microplastics in urine requires lab instruments (micro-Raman, pyrolysis GC/MS) and contamination-controlled handling — not something a consumer kit can do reliably. We don't offer one. Our at-home kit tests drinking water for microplastics instead.
What does a urine microplastics result mean?
It tells you that particles in your sample bound to the Nile Red dye and fluoresced — which includes most plastics, and also some non-plastic hydrophobic material. It does not tell you a body burden or anything about your health. It is best understood as a visualization experiment.
Related: microplastics in stool · microplastics blood tests, explained