There is a lot of controversy on ALA. I've read research that demonstrates how important it is and beneficial to the brain, and how well it expels mercury. On the other hand, I've read research that says that mercury redistribution is an issue, but the context of these studies always assumed there was no other chelator present—at least none was mentioned.

So...

I believe ALA is excellent for the brain and a powerful antioxidant, however, I would only use it in mercury chelation when another binding agent is present and only after the lower body has been at least somewhat detoxed.

That's how I boil down all the info I've encountered.