1 paper2 findings
Lead
no changein humans1downin humans1
Lead has no effect on summary cognitive function score in humans (-0.02 SD (95% CI: -0.12, 0.07)).
Humansamong those with high cognitively stimulating activities1 ppm higher second-trimester leadn = 704
Childhood mental activities linked to less lead harm in later life
Environmental health perspectives26 Aug 2026
Lead impairs summary cognitive function score in humans (-0.34 SD (95% CI: -0.52, -0.16)).
Humansfor those with less-frequent childhood cognitively stimulating activities1 ppm higher second-trimester leadn = 704
Childhood mental activities linked to less lead harm in later life
Environmental health perspectives26 Aug 2026
In adults with less childhood stimulation, 1 part per million higher second-trimester lead was linked to 0.34 standard deviations lower cognitive scores, but not with…In adults with less childhood stimulation, 1 part per million higher second-trimester lead was linked to 0.34 standard deviations lower cognitive scores, but not with high stimulation.