Nicotine as an Environmental Toxin: Implications for Children's Health

Despite significant declines in population smoking rates and effective policies to ban smoking in public places, environmental exposure to nicotine remains prevalent among children. Environmental smoke exposure affects children's respiratory, immune, and metabolic health but is also implicated in children's cognitive and behavioral development. Nicotine's chemical properties mimic naturally occurring chemicals in the brain. When nicotine is present during brain development (prenatally through the first five years of life), it alters developmental processes that affect systems involved in cognitive control, impulsivity, and sensitivity to rewarding substances, increasing risks for obesity. Because nicotine is the specific toxin underlying these outcomes, vaping is unlikely to be a safer alternative. Given the rise in vaping among young adults generally, and pregnant women specifically, this exposure represents a public health concern that warrants additional attention. Policies including modernized public health messaging and routine screening could reduce children's inadvertent exposure.