:/. I'm not actually convinced by the whole "Detox is a myth" thing. I'm pretty sure your body can lay down toxins in fat cells, so going on one of these detox diets that burns the fat cells releases them into your bloodstream, so they can be excreted. Which could work.
Apart from the fact that doesn't stop it being a really bad idea, because releasing a load of toxins into your system all in one go and not eating anything just doesn't sound clever.
According to one of my old science teachers, that's why a load of women got really ill/died when twiggy was popular - they all went on crash-diets, after eating food covered in pesticides for ages. I think it would be a far better to just eat sensibly, try and cut excess chemicals out by washing food thoroughly, or having homegrown/organic etc. exercise on a regular basis, don't get overweight, and drink plenty of water.
Have to admit, it sounds a lot easier to just starve for a few days and make a wish on the moon though...