Yeah, I would assume the D.E. is alright. I'm not sure of another way to bring the population of candida/yeast/fungus down without it besides eating the organic sauerkraut.
It carries many of the probiotic strains needed to repopulate the intestines which would alleviate the candida. Pretty cheap way to go considering the alternatives. I'm sure there are other stuff out there that would help get rid of it, off the top of my head I don't know what it is though.
David