In all seriousness, I've always suspected America's increased reliance on poorly regulated imports is directly related to the increase in mental issues ever increasing in numbers with each new generation. This includes ADHD, Bi-polarism, autism, etc.
Health effects – there is no safe level
Though lead is found frequently in our environment, it has no known purpose in our bodies. When lead gets inside the body, the body confuses it with calcium and other essential nutrients. This confusion can cause permanent damage to the health of both children and adults.
Children
"Lead is a developmental toxicant" and the "harmful effects of lead on children's development can occur without signs or symptoms."
In children, lead is most damaging when they are six years and younger. Children are growing at a very fast rate – growing bones, developing stronger muscles and creating many connections in their brain. When lead instead of essential nutrients is "available" to the body to make bones, muscle, and brain connections, permanent harm to health can occur. Even at low levels, lead can be harmful and be associated with:
•Learning disabilities resulting in a decreased intelligence (decreased IQ)
•Attention deficit disorder
•Behavior issues
•Nervous system damage
•Speech and language impairment
•Decreased muscle growth
•Decreased bone growth
•Kidney damage
High levels of lead are life threatening and can cause seizures, unconsciousness, and death.
Adults
Lead exposure is a concern for adults, even though they have finished growing. Since an adult's body is much larger than a child's body, more lead is needed to cause injury but the harm lead can do to an adult is very serious. High levels of lead can cause:
•Increased chance of illness during pregnancy
•Harm to a fetus, including brain damage or death
•Fertility problems in both men and women
•High blood pressure
•Digestive issues
•Nerve disorders
•Memory and concentration problems
•Muscle and joint pain
Lead and its human effects