Who is more susceptible to lead exposure?

• A. Adults
• B. Children
• C. Teens
• D. Elderly

Answer: (B)

Children are more susceptible to lead exposure because their bodies and behaviors make them especially vulnerable. Their digestive systems absorb a larger fraction of ingested lead than adults, and because they weigh much less, the same amount of lead raises their blood lead levels more than it would in an adult. They also engage in hand-to-mouth activities and spend a lot of time close to floors and dust, where lead from paint, soil, or dust accumulates, increasing ingestion. In addition, their nervous systems are still developing, so even low levels of lead can interfere with brain development, potentially causing lasting cognitive and behavioral problems. Adults can be affected too, but the combination of higher absorption, smaller body size, and ongoing brain development makes children the most at risk.