We have a massage place in a nearby shopping centre that claims to detox while you put your feet in a spa massager thingo .

The water changes colour after 30mins if toxins are released, I believe they scrub the feet with something before hand and depending upon the colour of water afterwards it'll show what toxins were eliminated....

I've been thinking that it can't be too harmful, I'm not changing my already healthy diet, and it's just putting my feet in water...right?