This might be old info, but last time I was looking up the labelling rules, it went like this:
.6-.9gm carb per serving, they can label <1
.1-.5gm carb per serving, they can label 0.
This is the core reason why I personally don’t aim for 20, or 25 gm carbs. I aim for 10 (not true, I actually aim for 0, but accept that this is nigh impossible and I don’t personally count leafy green carbs). That way when I inevitably miss once in a while, I miss small. (Aim small, miss small). It also means that if ninja carbs strike, I’m usually going to be fine.
If the ingredients listed aren’t anything you’d worry about for sugar, I’d say you can treat them as 0 or .1
For reference on that .1, while I can no longer recall where I read it, so consider this pure unsupported opinion, I read once that many cuts of steak and other meats actually have .1 or so gm carbs, and some slightly higher, simply due to glucose/glycogen stores in the meat that have survived aging and cooking.
My thought has always been that if you aren’t skating along the edge of the cliff and worrying about whether you’re at 19 or 21 carbs that day, these tiny fractions are not that important.
Oh, and I’ll second that boars head makes some good stuff. I especially like the aged Swiss and hard salami as a simple meal together.