I have been doing EFT for a few weeks now. So far it's worked pretty well for most things.
I have a range of symptoms I'm not going to mention here, but one thing I know I have is mercury poisoning. So I began one round of EFT with "even though the mercury has not left my body yet..."
BIG MISTAKE. Halfway through I felt a very metallic taste in my mouth and nearly fainted. I had to stop. The next few days I felt woozy.