I took ALA last summer, along with some NAC, for all the tingling pain in my extremities. It didn't make the pain go away, and then I got nerve conduction tests done which said that my nerves are perfectly healthy, so....
I still tingle. No one knows why!!!
I think it's useful, but not a magic bullet. I'm thinking about
restarting it as a part of a larger amino-acid supplementation protocol.