Your morning coffee is mostly free from harmful levels of toxins and contaminants, but a new investigation shows there's room for improvement. "While some contaminants were present, most were found at minimal levels and well below the European Union's safety limits per 6-ounce serving. This means coffee is generally safe," Molly Hamilton , executive director of the nonprofit Clean Label Project, which led the testing, told CNN. Research has linked drinking about 3 cups of black coffee a day to