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Lead toxicity is a preventable public health problem. In children, the disorders caused by lead exposure are usually asymptomatic. Early diagnosis can be made by blood lead level screening. The level which is accepted as toxic is decreased in years. In 1991 10mg/dl was considered as the level which negatively affects neurological and cognitive functions, but recently even the levels below 10mg/dl were shown to decrease IQ scores and affect neuropsychological functions, therefore it is recommended that the threshold value should be below 10mg/dl.