Health Canada has recently issued its final State of the Science report on lead, in response to concerns regarding its low-dose toxicity. Recent evidence suggests that adverse health effects may be associated with blood lead concentrations as low as 1-2 µg/dL, levels which are below the current Canadian blood lead intervention level of 10 µg/dL and which can be found in the Canadian population. Of particular concern was the link between low blood lead concentrations and neurodevelopmental effects, principally decreased intelligence quotient (IQ) scores, in infants and children. As a threshold has not been demonstrated for this critical effect, it would seem that the current blood lead intervention level can no longer be considered health-protective, and Health Canada has concluded that lead exposure needs to be reduced further.
Health Canada. Final Human Health State of the Science Report on Lead. February 2013.
The above item was taken from the March 2013 issue of Toxicology and Regulatory News which is sent automatically to members of bibra (click here for more details).
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