Can lead exposure during pregnancy increase your child's risk of autism?

What's actually in it

Lead enters a pregnant woman's body through old paint dust, contaminated water, imported pottery, and some foods. It crosses the placenta easily and reaches the baby's developing brain. Even very low levels of lead can disrupt the delicate wiring process that happens during fetal brain development.

What the research says

A 2026 systematic review in Int J Environ Health Res examined how lead damages synaptic signaling pathways in the brain and its connection to autism spectrum disorder (ASD). The review found that lead disrupts key signaling pathways at synapses, the connections between brain cells, in ways that overlap with the pathways involved in ASD.

Lead interferes with neurotransmitter release, calcium signaling, and brain cell communication. These are the same systems that don't work properly in children with autism. The review concluded that prenatal lead exposure is a plausible contributing factor to ASD risk.

Test your home for lead paint (especially pre-1978 homes) and your water for lead. Use a certified lead-removal filter. Avoid imported ceramics and pottery for cooking and serving food.