Question

Why is lead harmful to humans.

Answer 1

Exposure to small amounts of lead over a long period of time is called chronic toxicity. Lead is particularly dangerous because once it gets into a person's system, it is distributed throughout the body just like helpful minerals such as iron, calcium, and zinc. And lead can cause harm wherever it lands in the body.

Answer 2

Lead exposure can adversely affect nearly every system in the body. And because it often occurs with no obvious symptoms, it frequently goes undiagnosed until it's too late. Children younger than age 6 are especially vulnerable to lead poisoning, which can severely affect mental and physical development.