If only we could all take DMSA too..then the high Lead wouldn't be as much of an issue either :(
I have an "if" for you...
If..toxic, biounavailable copper needs to be chelated out (moly etc), so fresh copper can be used..
Would the high, biounavailable calcium that hasn't been being absorbed and is floating around causing problems...also need to be chelated somehow to get it out of the way for the fresh calcium? (probably not possible with high Lead).
If IP6 chelates oxidized Iron (rust), so fresh iron can be used...is there anything that does the same thing with bad calcium?