That’s risky stuff: Consistent, long-term exposure to even small amounts of heavy metals can lead to a variety of health problems. Read more about how CR tested dark chocolate (PDF). Five of the bars were above those levels for both cadmium and lead. They detected cadmium and lead in all of them.ĬR tested a mix of brands, including smaller ones, such as Alter Eco and Mast, and more familiar ones, like Dove and Ghirardelli.įor 23 of the bars, eating just an ounce a day would put an adult over a level that public health authorities and CR’s experts say may be harmful for at least one of those heavy metals. To see how much of a risk these favorite treats pose, Consumer Reports scientists recently measured the amount of heavy metals in 28 dark chocolate bars. The chocolate industry has been grappling with ways to lower those levels. Research has found that some dark chocolate bars contain cadmium and lead-two heavy metals linked to a host of health problems in children and adults. In fact, more than half of people in a recent survey from the National Confectioners Association described dark chocolate as a “better for you” candy.īut there’s a dark side to this “healthier” chocolate. People also choose dark chocolate in particular for its potential health benefits, thanks to studies that suggest its rich supply of antioxidants may improve heart health and other conditions, and for its relatively low levels of sugar. It’s a mood lifter, an energy booster, a reward after a tough day, a favorite holiday gift. For many of us, chocolate is more than just a tasty treat.
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