This article may sound stupid (and for good reason), but it's actually an interesting lesson in chemistry and enzymology. Will you dismiss it outright as another example of another moronic Bloom offering, or wonder why some simple chemistry can explain why pee is yellow and poop is brown? I suggest the latter. Makes for good bathroom reading.
Should you be in the mood to change the color of your pee, this is the article for you. Two drugs and one natural product do the job quite vividly. A colorful chemistry lesson, a party trick, and good bathroom reading!