Thanks for the reassuring post Bex. Sometimes in researching alt med methods you can get yourself so blinded with science that you question absolutely everything and start to wonder if you're in a complete muddle. I don't want that to happen to me now. I see myself getting better with what I'm doing; so unless that starts to change, I am going to carry on as I have been. I just put in a big order for DMSA in the US, which I will take home with me after I've visited my family there for Christmas (they are flying us over for a week because they want to spend a Christmas with my daughter). It's by far the most expensive order for any supplement I'm getting over there, but I think I have enough faith now that it will be well worth it.