Orac was late in covering this, and I was late in reading it, but I'm glad someone did a bit of in-depth about those silly Kinoki foot pads that allegedly detoxify a person through their feet, since humans are exactly like trees, sending toxins to their roots. And not that we've been using other methods of getting rid of that stuff.
Looks like they're completely self contained: Heat and moisture from steam caused them to blacken on their own. Kind of like how that foot washer detox thing turns the water brown by rusting one of the electrodes. We should probably get that out there until it's common knowledge. Then my late night shows might dump those annoying commercials.