A while ago I took many boxes of Threelac and then Fivelac when it first came out. I took them for about 4 or 5 months. They helped me some but did not get rid of my candida. They are not effective enough.
I am now taking Miracle-Mineral-Supplement . It is by far the most potent antifungal. There is a curezone forum for it. You can check out information there.
I have brain fog too. Following are what I take for brain fog.
* Digestive enzyme. I found that my brain fog is related to digestion and I possibly have leaky gut. Digestive enzymes is a big help. I tried several brands and the one works for me is NOW super enzymes.
* Molybdenum and Pantethine. These two supplements helped me ease my candida die off symptoms.
I also read somewhere that Hu-Mana-Tea is good for candida die off. But I haven't personally tried it. You can do a search on curezone to see other people's testimonies.