Is glutamine an amino acid that generally keeps the homocystein at work? Meaning you need a working homocystein to tolerate glutamine. Is high homocystein also an indicator for high Noradrenaline? I have started to feel bad from NAC but im not sure why, it could be because I started taking glutamine before that and felt pretty okay on it. But it all changed when I took NAC after a short period of smaller doses of Glutamine.