Did you guys consider that nac's action does not necessarily rely on c60? There has been at least one study describing that nac (and selenium) does not only improve the antioxidant system (the glutathione part) within the cells of especially older people, but also improve the anabolic effect of an protein meal(can't find sources right now :/ ).
Also its able to increase testosterone through protecting the testes from oxidant damage.
http://www.ncbi.nlm....pubmed/19091331
and improves stamina...
http://www.ncbi.nlm....pubmed/20937413
The funny thing is, science complains about anti oxidants being bad for performance nowadays, but they seem to look at antioxidants such as vitamin c, e, etc... However, would it not make more sense to look at the basic antioxidants such as glutathione to make conclusions about anti-oxidative effects? And nac clearly shows benefits.
And if c60 depletes antioxidants, glutathione is only part of the picture. There are at least 3 main anti oxidants... glutathione, SOD, and... can't remember the third one. Each performing special tasks. The goal would be to raise them all. Unfortunately I didn't have time yet to look into it. :/