Can polystyrene nanoplastics from takeout containers hurt egg quality and fertility?

What's actually in it

Polystyrene nanoplastics are the ultra-tiny breakdown products of foam food containers, disposable cups, and plastic utensils. They're far smaller than microplastics, small enough to slip inside individual cells. You're exposed through food, drinks, and even the air in rooms where foam packaging is used.

These particles are worth paying attention to for reproductive health because egg cells (oocytes) are some of the most sensitive cells in the body. They don't regenerate. The eggs you have now are the ones you'll always have.

What the research says

A 2026 study in Sci Total Environ tested what happens when egg cells are exposed to polystyrene nanoplastics. The results were troubling: the particles were actively taken up by cumulus-oocyte complexes, the clusters of cells that surround and nourish each egg.

Once inside, the nanoplastics disrupted oocyte maturation. Eggs didn't develop properly or reach the stage needed for fertilization. The supporting cumulus cells, which feed and protect the egg, also showed signs of damage.

Even when eggs did get fertilized, the resulting embryos developed poorly. They grew more slowly and had more abnormalities than embryos from unexposed eggs. The damage started before fertilization and carried forward.

For anyone trying to conceive or planning to in the future, reducing contact with polystyrene makes sense. Swap foam takeout containers for your own glass or stainless steel ones, and avoid drinking hot beverages from foam cups.