It is never too late to try to get rid of mercury. The body will start to heal and regenerate after the mercury is gone, but you just gotta go at a pace your body can handle.

I don't think that was me in regards to the magnesium succinate, unless you meant DMSA which is Dimercaptosuccinic acid. In any case Andy Cutler says many people feel better when taking ALA with DMSA, but you would have to do both in very small dosages.