So it seems established that most of us have low glutathione levels (right?). How do we know whether these low levels are due to a partial methylation block or due to a deficiency of the amino acids necessary to make glutathione (cysteine, glycine, and glutamine)? My NutrEval results showed pretty low levels of glycine and glutamine and moderate levels of cysteine. My MMA and FIGlu levels were not out-of-range high. So is it possible that my low glutathione is due to a lack of amino acids rather than a methylation block? Do I need the methylation diagnostic test in order to know for sure? I don't understand why I have these amino acid deficiencies. My normal breakfast for the last year has been a smoothie with protein powder that contains at least a gram of all of these amino acids. It seems like I must not be absorbing the protein. Should I ask my doctor about the prescription pancreatic enzymes that are available? Has anyone had any luck with these (eg. Zenpep)? Taking the active B12s is definitely doing something for me; my mood is better and I am getting low potassium symptoms when I'm not careful (mostly muscle twitching and dizziness). But, I'm wondering if I need to address protein absorption too. Thanks!