Yes, You are correct. Candida does build a resistance. But.... I really didn't use the herbs in the Humaworm Parasite Cleanse to cure my candida. I used a lot of different ones on a 5 day rotation. That way, if I ever need them again, I will not be immune to them.
What is in the candex and would you become immune to it? I never tried it so I have no idea.