Can gestational exposure to heavy metals put your baby at risk of being born too small?

What's actually in it

Pregnant women absorb metals like lead, mercury, arsenic, and cadmium from drinking water, food, household dust, and air pollution. These metals cross the placenta and can restrict fetal growth. Being born too small puts a baby at risk for breathing problems, infections, and developmental delays.

What the research says

A 2026 systematic review and meta-analysis in Environ Int pooled data from multiple studies to examine the link between gestational metal exposure and birth size. The results showed that higher metal exposure during pregnancy was associated with a greater risk of small, vulnerable newborns.

Multiple metals contributed to the risk, and exposure to several metals at once was worse than any single metal alone. The effects were seen across different populations and study designs, making the evidence strong.

During pregnancy, test your water for metals and use a filter if needed. Eat foods rich in iron, calcium, and zinc, which compete with toxic metals for absorption. Avoid high-mercury fish and limit rice consumption.