I would not have a race before or after amalgam removal. It takes your body sometime to recover and your body will be taking a bit of a pounding from the amalgam removal. I would not prepare for amalgam removal by a recent race, which takes a lot out of you. you need to prepare yourself for the removal with good food, supplements and rest in my opinion.

I can only repeat what JK has said, not to take vitamin C for 24 hours before dental work. It apparently can interfere with getting numb. Even 48 hours has been suggested.

I'm also wondering about other antioxidants too. I seem to recall selenium did similar to me, but it may have been coincidence.