 It's like when you eat Cheerios, there's iron added to the Cheerios. You can put a magnet over it, and it'll be attracted to a magnet. There's iron in it. So if we fed a guy that same diet, you'd get it out of his poop as well, right? Yes. But when you buy commercial fertilizers, you're just getting potassium and... I can't think. What's the other ones? Potassium and nitrogen and...