Fresh corn is considered a widely accetable paleo food (in moderation). Grits are just ground corn/maize. Since you cook both, why are grits frowned upon?
Who said corn is ok? Corn is a grain...a GMO grain at that thanks to good ol' Monsanto.
Holy fucking hell! My occasional taco foray makes corn "paleo"?? C'mon folks, you can do better than this.
From Mark's Daily Apple:
Corn is Not a Vegetable http://www.marksdailyapple.com/corn-is-not-a-vegetable/
Robb Wolf eats corn tortillas because (as he said in his podcast) that after adding them back in they didn't not present a problem to him in terms of digestion and other issues.
In the grand scheme of paleo-ness, corn isn't too bad. On the scale of grains that can screw you up (wheat at the high end, rice at the low end), corn is definitely a closer to rice than wheat. Of course, N=1 and YMMV… If you can fit in a moderate amount of corn without issue, go right ahead. Don't worry about "paleo purity points", contrary to popular belief you don't get a gold star from Robb Wolf or Mark Sisson when you earn 1000 PPP.
Corn? No thanks. most of the stuff sold in the US is GMO corn, which supposedly can lead to organ failure.
It may well be that most people don't show immediate symptoms, and after all, we're all grown ups here, so if you want to eat that stuff, go right ahead. Me, I'll stay away from it.
I'll stick to my somewhat non-paleo cheats: chocolate, tequila, single malt scotches, and bacon instead.
I dont know if corn is "OK", but grits are a boxed byproduct of corn that has been processed well beyond its original state (maybe?). I dont have a box or anything to look at the actual content, but if it was a simple matter of ground corn I would suppose they are about as paleo as corn. Then again I keep corn to summer in season treats straight off the cobb.