Hi - I suffer from Candida too and was also concerned about the apple juice. I called the company to enquire and yes, it's fine to mix the powder with water. In fact, I started the cleanse last night and drank it with water. True, it isn't as tasty as it would be with apple juice, but that's waaay to much Sugar for us candida types. And no, it wasn't the best tasting stuff but I washed it down with a second glass of water pretty quickly and wasn't bothered with any aftertaste. (Anyway, in the name of good health and progress, we can't be sissies - I know I'm willing to "take my medicine" as they used to say.)
One final thought, if you get the BH and really can't stand them, you could always put the stuff in gelcaps and swallow it that way (I know that's what I do for the Epsom Salts in the liver flush)