I suspect its doing the same thing as NUUN or Pickle Juice. I find it more cost effective than NUUN if I’m biking a lot in hot weather (and sweating a lot), and well, pickle juice is what, mostly vinegar…? NUUN and pickle juice are more fun to talk about though.
I just add 10 drops to a bottle of water. Rather tasteless (adds a slightly salty taste to the water)