>It's fairly common, at least for some people, to get brain fog during
>the first few weeks of a low/zero carb diet, 

Ha! A few weeks? Well, obviously not an option for me, even if I believed that all carbs are evil as some on this list apparently do.

>Similar to the brain fog many smokers get in the first few weeks of quitting
>smoking (increased oxygen flow,for one - in my case, I was a raving
>idiot for awhile!!)

Actually, when I quit (25 years ago), I only experienced it for about a day. Of course, this was after I had already quit numerous times :), so perhaps I had inadvertantly pre-conditioned myself.