Dangerous levels of heavy metals have been found in dark chocolate bars, both from major and lesser-known brands.
In a test of 28 bars of dark chocolate, Consumer Reports found that many contain high amounts of cadmium and lead, the consumer advocacy group said Thursday.
The metals can lead to a variety of health problems, including nervous system problems, kidney damage and reproductive issues in adults, and development problems for children, Consumer Reports said.
Consumer Reports found that for 23 of the bars, eating just one ounce daily would give an adult an unsafe level of at least one of the two metals.