[kowalej]

N-Acetylcysteine (NAC) has been studied in relation to a myriad of psychiatric disorders with a lot of positive results. It works as an antioxidant and neuro-regulator. For some reason it was recently pulled from supplement classification in the US, but it's available just about anywhere in Canada. Not sure about other countries.

[evanlivingston]

Er, when I went looking into the research I only found inconclusive results for it's benefits. I took it for a long time to help with nicotine cravings and ADHD and never noticed a semblance of a beneficial effect.

There's also an increasing concern that it's actually a carcinogen.