1. The Food and Drug Administration writes that its dietary mercury guidelines were “established to limit consumers’ methyl mercury exposure to levels 10 times lower than the lowest levels associated with adverse effects.” Americans who consume twice as much mercury as the FDA recommends are still protected by a 500-percent cushion. The same generous safety margin applies to the Environmental Protection Agency’s mercury “Reference Dose.” And the Centers for Disease Control and Prevention reports that zero percent of American children exceed the EPA’s hyper-cautionary guideline.