Chelation is a serious matter.! If it is done right, you get the benefits of eliminating heavy metals from your body. But, when the chelating agents aren't used correctly, they do irreversible damage to your health. The thing is no taking DMSA, EDTA, AlA , or any other chelator. But, knowing how to take them, the dosage, frequency, and order. Trust me, it is complicated. Don't take anything until you be well documented about it. I have been a member of a chelation yahoo group based on Cutler protocol and the Autism chelation group for a while, have two chelation books, read a lot of materials about it, and I am still learning ! So, be careful.