Candy Dynamics's Toxic Waste Nuclear Sludge Chew Bar wasn't just "hazardously sour," it was actually toxic. When California's Department of Public Health found 0.24 parts per million of lead in the candy line's cherry flavor in 2011, a mass recall was put out to remove the treat from store shelves. The FDA doesn't allow more than 0.1 parts per million of lead in consumable products.