Scientists looking for toxic heavy metals find lead, cadmium in dozens of samples of the sweet treat
                                
                                
                                    (Newser) -
                                    Every so often, a study emerges  touting   the   benefits  of eating chocolate, with dark chocolate  earning special praise . New research, however, has unearthed toxic heavy metals in dozens of dark-chocolate products sold by Amazon, Whole Foods, and GNC, among other retailers. For the peer-reviewed research published Tuesday in the journal...