So this friend of mine whom I've never told anyone about invented this at home kit people can use to check whether they have any vitamin or mineral deficiencies. It's basically just a urine analysis kit that monitors your excreted levels of things like calcium, magnesium, zinc, etc. If you're getting enough, and it's coming through, you should cut back on your supplements because it's wasted or could even be harmful.
The simple analytes are easy--things like calcium, magnesium. He's working on the organics now. He calls it "Ur Analysis" Get it?