MG,
It normally takes a lot more than 12 grams of carbs to throw a full grown man out of ketosis. Especially if he works out at all.
I know - my S.O. (who doesn't lift anything heavier than a remote w/AAA batteries) stays in ketosis at about 40-50 grams per day.
#%@$^!!!!
I get kicked out at 25!
Fawn