Hi David, thanks for the reply. Because from what I read, citric acid in supplements are produced by yeast, and that could be bad. Although I got 4 opinions that say citric acid is nothing to worry about, and Dr. Jeffrey McCombs said that is even good for candida, that acid helps candida to convert back to it's yeast form. I'm changing my vitamin C anyway, but I took that for a very long time while treating myself. I don't remember getting any reactions by it though.