Can microplastics from food packaging reach the placenta during pregnancy?

What's actually in it

Microplastics are tiny fragments of plastic that break off from food containers, water bottles, and packaging. The most common types found in the body are PET (used in water bottles and takeout containers) and polypropylene (used in yogurt cups, deli containers, and baby bottles). These particles are so small they can pass through the walls of your digestive system and into your bloodstream.

During pregnancy, whatever is circulating in the mother's blood can potentially reach the placenta, the organ that nourishes the developing baby.

What the research says

A 2026 study in NanoImpact used multiple analytical techniques to identify microplastics in both menstrual and amniotic fluids. This confirmed that plastic particles are reaching reproductive tissues in the human body.

Another 2026 study in Ecotoxicol Environ Saf specifically looked at placentas after birth and found microplastic contamination. The study linked the amount of microplastics in the placenta to differences in birth weight and body size of the newborns.

A 2026 study in Environ Health Prev Med found microplastics in human stool and linked dietary patterns to the types and amounts of particles found. People who ate more packaged and processed foods had higher microplastic loads.

The 2026 review in Trends Microbiol traced the full path of microplastics through the food chain, from packaging to ingestion to tissue accumulation. The evidence shows these particles do not just pass through your body. They lodge in tissues and organs.

The bottom line

Microplastics from everyday food packaging are reaching the placenta. If you're pregnant or planning to become pregnant, switching to glass or stainless steel food storage and avoiding plastic water bottles can reduce your exposure during the time it matters most.