Brands like Trader Joes, Walmart, Ghirardelli and Hersheys are among the affected products.
Last year,Consumer Reportsinitially found heavy metals in somepopular dark chocolate products.
Since then, their investigation has expanded.
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Although also tested for arsenic and mercury, none of these products contained problematic amounts.
Adults can also experience negative side effects like immune system suppression, reproductive issues, kidney damage and hypertension.
Plus, dark chocolate does have some health benefits, too.
In general, these sweets can be enjoyed in moderation within a healthy eating pattern.
