While lead is a naturally occurring metal, some exposures can be toxic. Lead poisoning is one of the most common lead effects. Anyone under the age of six is particularly susceptible. Exposure can come from the soil or in drinking water that has lead based pipes. Some children that play in lead contaminated soil can have high levels of lead in their body. Some people will attribute the lead effects to the flu or another malady since the symptoms are similar. However lead poisoning has some specific symptoms including; A bluish line on the gums, Pallor, A metallic taste in your mouth, Lead poisoning can be toxic if it is ingested. Health organizations have studied the link between cancer and lead exposure. While some of the studies seem to point toward a link, the Environmental Protection Agency (EPA) says the lead is a probable carcinogen but has not classified it as a known cancer causing agent.