How do you suggest figuring out whether one is safe to go?
I guess if you can do a couple rounds with 200 or 300mg ALA without experiencing any issues during or afterward, you can pretty safely say that you don't suffer from mercury toxicity. That's what is often suggested in the Cutler groups to know whether one is mercury toxic - if you can tolerate the highest suggested dose without any changes at all, this means that no relevant amount of mercury is mobilized.