Are plastic particles from food containers getting into your bloodstream?
Yes. PET and polypropylene microplastics have been found in human blood samples.
What's actually in it
PET (polyethylene terephthalate) is the plastic in most water bottles, soda bottles, and many food containers. Polypropylene is in yogurt cups, deli containers, and some baby bottles labeled #5. Both shed microplastic particles through normal use, especially with heat, mechanical stress, or acidic contents.
Once swallowed, the smallest particles pass through the gut wall into the bloodstream. From there, they travel to organs.
What the research says
A 2026 study in Naunyn Schmiedebergs Arch Pharmacol confirmed PET and polypropylene microplastic bioaccumulation in human blood. The study found both types of plastic particles in blood samples. The presence in blood means the particles have already crossed the gut barrier and entered systemic circulation, where they can reach any organ in the body.
Every day you use plastic bottles and containers adds to this accumulation. The particles don't clear quickly.
The fix is reducing the plastic that touches your food and drinks. Glass food storage and stainless steel water bottles eliminate PET and polypropylene exposure from food contact.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Polyethylene terephthalate and polypropylene microplastic bioaccumulation in human blood | Naunyn Schmiedebergs Arch Pharmacol | 2026 |
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