I've never bought it, I make it. But it should say on the bottle if you purchase it. Of course, they say that CS you buy in a store has probably diminished. But I don't know how they sell it.
You might want to post on the CS forum and ask them. I'm sure they'd be happy to help. I just started this therapy, and I'm afraid I'm not much help, I still have a lot of questions too.
If she had a stroke, that could be the neurological problem. But if it doesn't kill her, then I guess you could handle a bit of paralysis. Good luck to you. I hope everything turns out well!