Test glutathione or glutathione peroxidase? Would the difference be significant? I received a test result recently that says that my Total Glutathione is very close to being low. Is that something that can be relied upon to be accurate? Has anyone here found a low glutathione test result and managed to correct it? I'm already on a good number of methylation supplements and they have corrected my homocysteine level but haven't done enough for my glutathione levels or so it would seem I've been making a list of supplements to test out in an attempt to raise the glutathione assuming the total glutathione is shooting me straight about low levels: 1. Reduced Glutathione 2. Bioactive Whey Protein[been taking regular whey protein isolate so if it was going to correct my levels it should have done so by now, read a number of articles online and continually came up with recommendations nearly identical to this one that came from mercola's website so I figure this is the consensus on what medicinal whey protein should be: Be sure your whey protein supplement has the following features: The whey comes from grass-fed cows that are not treated with pesticides or hormones Cold processed, since heat destroys whey’s fragile molecular structure Whey protein concentrate, not protein isolates Sweetened naturally, not artificially, and low in carbohydrates Highly digestible—look for medium chain fatty acids (MCTs), not long chain fatty acids 3. Liposomal Glutathione 4. NAC (I've already tried it in the past, had incredible results off and on for a month and then it faded to nothing. that was three years ago, haven't been able to get any results from it since then despite numerous short tests. Maybe I need to take it for a good bit for it to work?) My selenium levels are fine Should I perhaps test my sulfate levels?