Even at 4 grams a day, most is probably excreted and not utilized.
This is not the case. Like claims about vitamin C causing kidney stones, it is more rumour than fact. While it's great that everyone here shares personal experience, and while that is equally valid for us all, I would respectfully ask that you do a little research before you make remarks like the above. IMO it is unhelpful to be giving incorrect information on a forum like this.
I find myself feeling increasingly emotional about this subject so I think it's time I gave it a rest for now.
I'm also going to respectfully ask that if people here are interested in continuing discussion of this topic, perhaps it could be taken to a new thread. In future if I want to look back at this thread, it would be helpful for me to be able to find information about my chelation experience.