After a year and a wealth of different products, I found ThreeLac. It's the best product for treating yeast that I have ever come across. The ThreeLac works because, due to a special micro-encapsulation process, the ThreeLac is able to survive the acidic environment in the stomach. Thus 90% of it is able to reach the intestines and do the work it needs to in order to kill the Candida. Most other products fail because they do not survive the stomach acid.
If it helps you, I am such a believer in the product, that I now sell it myself because I want everyone who needs it to have ready access to it. Also, if you have never tried it, I will sell it to you at wholesale pricing rather than retail.
I'm happy to answer any other questions you may have, and if you are interested in ordering, you can e-mail me at firstname.lastname@example.org (I'm a "contentlady" because of ThreeLac. Without it, I'd probably still be miserable.)