You can find doctors that have any number of opinions, so it's not a good idea to base information on opinions of doctors.

It's better to use real studies that have been well executed. I have seen studies about the efficacy of oral DMSA and have used it myself. It's also saved many children from autism. I will, however, have to check out the study about it altering the immune system.

I'm also interested in sourcing the statement from Haley against DMSA. I respect his opinion, but I would first have to confirm that he did say what the article says he did.

As for me, I have immediate positive results with DMSA: More energy, less brain fog, etc. within about 15 minutes of taking it.