Lead exposure is a serious public health issue, especially for children. Lead is a toxic heavy metal that can cause severe and lasting damage to a child's developing brain and nervous system, even at low levels of exposure. The effects of lead exposure are often irreversible and can lead to lifelong health problems. Lead exposure can come from a variety of sources, including lead-based paint, contaminated soil, and old water pipes. Children are particularly vulnerable to lead exposure because they absorb lead more easily than adults, and their developing bodies and brains are more sensitive to its effects. The symptoms of lead poisoning are not always immediately apparent, which is why it is often referred to as a "silent threat." Symptoms can include irritability, loss of appetite, weight loss, abdominal pain, constipation, fatigue, and sleep disturbances. However, in many cases, children may not exhibit any symptoms at all. The long-term effects of lead exposure can be devastating. Lead poisoning can cause permanent damage to a child's brain and nervous system, leading to learning and behavioral problems, lower IQ, and developmental delays. Children who are exposed to lead are also at higher risk for attention deficit hyperactivity disorder (ADHD), conduct disorder, and antisocial behavior.