Why are you chelating?
You probably shouldnt be chelating for the first 6 months after Amalgam removal. You should not use ALA for at least 3 months after Amalgam removal.
Dmsa MIGHT be good for a few days after Amalgam removal to reduce the mercury exposure to the procedure.
Dmsa is expensive and unnecessary and DOES NOT CROSS THE BLOOD BRAIN BARRIER so it wont remove mercury from your brain. If you take it while you still have a high load of bodily mercury you can end up moving mercury into your brain.