I reed that we need glutathion to lose our metal toxity. We with ME/CFS are lacking in produce gluthation right? So that would be the reason that healthy people not being sick of high metals. I find that people who react to thiols (sulfer) its because of the metal toxity. I also react very badly to thiols (neuropathy very heavy) this link below is from a site in holland but the articel is in Englisch. its a patient that had also arseniucm toxity and is also reacting to thiols. so its because of the metal toxity why we react so badly. So we have to lose this metals with Gluthation. http://www.neuropathie.nu/te-veel-/neuropathie-door-arsenicum-vergiftiging.html How to produce Gluthation? With cytiene, glycine and glutamine. (**whe are lacking also in produce taurine as well so we have high glutamate also** look at the link below very intresting**) http://www.holistic-back-relief.com/glutathione.html when we produce gluthation we can lose our metals and would not react to thiols anymore right? when you reed on this site below in the first reaction most people have high cystien when they react to thiols so give them glycine en glutamine and they produce GLUTATHION. https://www.paleohacks.com/paleo/sulfur-intolerance-aka-poor-sulfur-oxidation-ever-heard-of-it-6702 so for people who have thiol/sulfur sensivity / CBS mutations can try it. I am i think a high cystien person. I react bad to cystiene and very good to Taurine because thats low i think. This explain it al in this links above. Do anyone know how much glutamine and glycine i have to take? I reed 2:1 (glutamine, glycine) but how much can i try?