Long viewed as healthier than other sweet treats, some kinds of dark chocolate contain potentially dangerous amounts of heavy metals, according to research released on Thursday by Consumer Reports.
Long viewed as healthier than other sweet treats, some kinds of dark chocolate contain potentially dangerous amounts of heavy metals, according toScientists at the nonprofit advocacy organization recently measured the amount of heavy metals in 28 popular brands of dark chocolate bars and found cadmium and lead in all of them. For 23 of the bars, consuming just an ounce a day would put an adult over a level for at least one of the metals that could be harmful, CR said.
"But there are risks for people of any age," Tunde Akinleye, the CR food safety researcher who led the testing, said in a statement. Frequent exposure to lead in adults can lead to nervous system problems, hypertension, immune system suppression, kidney damage and reproductive issues, he noted.While most of the chocolate bars tested contained concerning levels of lead, cadmium or both, five had relatively low levels of both metals, CR found.
In determining the risks for the chocolate it tested, CR used California's maximum allowable dose level of 0.5 micrograms for lead and 4.1 micrograms for cadmium, as there are no federal limits.
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