Exposure to high levels of lead lowers IQ

As a result of a study conducted in the USA on the harmful effects of lead, it is estimated that exposure to lead, primarily from car exhaust, negatively affects the IQ of about half of the population. It is stated that exposure to lead, especially in childhood, affects people more.

Also leads to long-term diseases

Duke University researchers conducted a study to measure the effect of lead exposure on IQ levels from the perspective of the total population. A study using multiple datasets found that exposure to harmful levels of lead causes a decrease in iQ.

Although lead exposure is thought to be caused by many factors, including paints and water pipes, the biggest factor is the exhausts of cars that use leaded gasoline. It is thought that U.S. citizens exposed to lead as a child may have had a total reduced IQ of 824 million points.

It is said that people born in 1965 and later may have lost six IQ points, and this score rises to seven for those who were exposed to higher levels of lead in childhood. The researchers note that they observed that, on average, exposure to lead reduces the IQ of every adult citizen by about three points.

Researchers, They said that exposure to harmful levels of lead not only causes lower IQs, but also puts them at higher risk for other long-term health disorders, such as reduced brain size, increased likelihood of mental illness and cardiovascular disease in adulthood.