If you are concerned about your liver, have you considered a "functional liver detox profile"? It is a test to determine the function of your liver's detox capacity. Taking Kyolic odorles aged garlic can have an excellent effect on clearing the liver, and I have noticed some good effect with brain fog with more than a few patients who took odorless garlic.
The best way to take glutathione is intravenous, there is no doubt about it. Ozone therapy is another way you may be able to successfully clear brain fog. Hang in there, it is possible to clear brain fog. I'd suggest you study up on candida metabolites like mannan.