Primal Defense is a blend of probiotics (friendly bacteria that normally inhabit the digestive tract, skin, respitory tract and genital-urinary tract)and HSOs(homeo-static soil organisms). HSOs are friendly bacteria that don't normally inhabit the digestive tract. From what I understand they just kind of stick around for a bit and then pass right on through. Apparently people used to (still do in other countries that aren't terrified of a little dirt on their food)ingest these all the time with their vegetation. So really they're just good bacteria found in dirt. Makes you think God just might have know what he was doing :o) Anyway, they're just another tool in helping choke out the Candida.
If you've ever taken anti-biotics, there's a dang good chance these friendly bacteria were/are overrun by yeast and bad bacteria.
You can get Primal Defense at your local health food store, but I order it from VitaCost because it's a lot cheaper. I'm currently taking 8 a day, but you have to work your way up or you will have terrible die-off reactions.