yeah heck you need trance amounts of iodine to live and only like 2cc's can kill youYep, NaCl is a component in those electrolytes that Gatorade and Powerade advertise about. Without it, you would die. But it's just like anything too much can kill too. Think about the trace minerals in your body. Gotta have them for proper cell function, but will too much of them, metal toxicity issues.