oh that's a good question, I don't have a post about Soy in my FAQ. Hmmm. Will have to think about that. The best info I've found on soy is at www.westonaprice.org.
I drank Vanilla Rice Milk and an Almond Milk when I had candida and it was fine for me. Your results may vary, but really since the "sugars" are more complex than refined sugar, and since you won't be drinking all that much (I had a large protein shake every day for breakfast myself) you should be okay. Yeasties love undigested foods and very simple sugars.