Hi Dawn,
Sorry if I've worried you. I can't remember where I read it (I've done so much research that it all seems to blend into one) but I seem to remember it was a forum and they listed all the different names for mercury. I've just been on the internet to look for it but can't find anything. I remember it was the substance listed at the beginning of the ingredients.
I hope it's a myth. I've used it many times and found that it works really well.