Yes - I added a little good salt the whole time.

I just used what I had, that "Emergen-C" stuff that's sold wherever. I'm sure it's not the best, but it did the trick. I diluted a packet in a big bottle of water and drank it throughout the day, in case it would be a shock to take all at once.

I'd been starting to feel sick (next time I won't wait until then), and it was enough to make it so I could continue.