"DMSA and DMPS are available only by prescription. Respected toxicologists have told me that these chelators should only be used in cases of ACUTE metal poisoning, or as a last resort for intractable chronic poisoning. Natural methods should be exhausted first. "
This is contrast to what I have heard said about the dangers of chlorella and especially cilantro.
But I can tell you MANY MANY herbs you people have never heard of have binding and chelating properties. And I have taken quite a few things...
To sum it up I would say so far, I have been a good bit more scared by stories of DMPS than DMSA.