I tried NAC in late March and threw away the practically full bottle. I too was curious about he things I was reading about NAC, and since I'm in experimentation mode, I purchased some. I was disappointed with the results.
Firstly, the mind-feeling I had was ok, but it was kind of numbing (1G); neither here not there. I tried a couple combos with Tyrosine, ALA and ALCAR, but was not particular motivated, engaging or anything really. I've had better success using other combos. Secondly, I read shortly after that NAC is a relatively strong chelator, and I want nothing to do with chelation. I don't want to move any heavy-metal molecules in my body all throughout my system, and I believe NAC might bind to metals like mercury and move them in the brain. I simply don't need, or want to risk taking chelation products, which is why I rarely use ALA and only in minimum doses with ALCAR as an antioxidant.
But the final straw were this eye tremors I started having the second day after taking NAC. I'm particularly sensitive to this since I have a ocular implant in my left eye from a sports injury obtained nearly 20 years ago. I experienced bad tremors in my right (good eye), and I've never experienced this with any other supplement. After 2 days of this, I stopped the NAC since I suspected it was stripping (binding) my retina of zinc which the eye needed - the chelation effect. After a couple weeks I decided to try 1 500MG capsule of NAC and the eye tremors started again a couple hours later. That was it for me.
Anyway, that's my experience.
Edited by Synaptik, 24 April 2012 - 02:52 AM.