I've been on Atkins for five, going on six weeks now and taken Communion (wafer and wine) every Sunday with no problems. Never seen a change in ketostik color or anything. I tried for weeks to get an accurate measure of how many carbs it had, but never found anything more than rough estimates. I think it's not a significant amount of carbs (especially at Roman Catholic churches, where they are quite thin and light (like an eighth of an ounce or less?) I wouldn't estimate that for more than a carb or two, if that. Also, you've got to figure, as far as important things in your diet go, that's probably the MOST important one. I decided just to treat it as something non-negotiable and not worry about it.