The current lead toxicity I have in my kidneys very likely comes from a previous chelation gone awry. The chelated lead from the body tissues end up getting stuck on the kidney, instead of being urinated out. So, I'm just very careful not to introduce new lead into my body. It sounds nice that it can be chelated, but things don't always turn out the way we intended. Life always throws you a curve ball, so they say.I'm not sure if it's something to worry about. As far as I can tell, all we have going for that is one short Ray Peat quote. I have not been able to find any data on this.
But if there were trace heavy metals present, a tiny amount of EDTA – or maybe even phytic acid – would probably safely chelate most of them.