Can prenatal phthalate exposure lower your child's problem-solving ability?

What's actually in it

Phthalates are in soft plastics, food packaging, vinyl flooring, personal care products, and fragrances. Pregnant women absorb them through food, skin contact, and breathing. These chemicals cross the placenta and reach the developing baby's brain during its most sensitive growth period. Every pregnant woman tested in biomonitoring studies has phthalates in her body.

What the research says

A 2026 study in Neurotoxicol Teratol used advanced statistical modeling to test the link between prenatal phthalate exposure and cognitive ability in children. The researchers measured phthalate levels in pregnant women's urine, then assessed their children's thinking skills years later.

Children whose mothers had higher phthalate levels during pregnancy scored lower on tests of fluid cognition. Fluid cognition is the ability to solve new problems, recognize patterns, and think abstractly. It's the raw processing power of the brain.

The study used a latent variable approach, which means it looked at the combined effect of multiple phthalates together rather than one at a time. This better reflects real life, where you're exposed to a mix of different phthalates every day.

The effects were subtle but measurable. A few points across a population shifts the entire curve. It means more children at the low end and fewer at the high end. The exposure is avoidable by reducing contact with soft plastics, fragranced products, and processed food packaging during pregnancy.