Yeah, you must wonder what exactly is going on. The ALA for sure is helping you though, and it's unusual you don't notice problems with missed doses, but it's possible you're actually less poisoned and not as sensitive to the effects of missed doses.

So it's very probable, that you are well on the way to healing, but ALA is probably at the point of keeping you well, so yes, you would need to take it for a long while yet. Possibly another year to be sure.

If it should turn out that you're not poisoned anymore, you may be able to take ALA simply as a supplement like anything else and not have to do the every 3-4 hour routine.

Might be wise to ask Andy himself about it via email. He'll be interested to hear this.