ok, yeah, i did not read it, just skimmed it. i ran across that "can" word a day or two ago and was telling someone the same thing. that word is used very carefully and sneakily many times by scientists. also, the work "mostly" or "most of", like stephen barrett gets most of his funding from donations. as far as the NAC, i think i'll err on the side of caution until mercola and/or some others tackle it.