@johnbishop Thanks so much for the input about the kind of ALA you use, how much you are taking, and the link for purchasing it. I used ALA for a month but wasn't well educated enough to know the difference between the S-ALA and R-ALA. What I took did not help at all, and looking online just now at my previous purchase it was obviously the S-ALA. I told my neurologist I had tried ALA and that it had not helped. She said ALA was one of the things she always recommended but she never asked which kind I had used or offered up any information about the differences between the two. I may have already mentioned to you that I am looking for a new neurologist for many other reasons. This is just one more reason I need to keep looking.
You are a constant source of good and useful information. Many thanks!