Why do some canned fish (that are not clams, oysters etc) list 1 carb in their content? I saw this on Whole Foods canned sockeye salmon as well as bumble bee canned mackerel. It doesn’t say there are any added sugars.
On the other hand oysters have carbs and some canned oyster brands list no carbs on the back?
Crown of Prince Oysters for example, and it also says it has a lot of fat. I thoughts oysters had almost no fat. This is for oysters packed in water.
I did a quick rummage around the U.S. Department of Agriculture’s food composition database, looking at various entries for oysters and canned fish. In practically every case, the carbohydrate amount is calculated, not measured. The entry usually says “by difference,” which makes me think they are simply assuming that what is not water, protein, or fat must therefore be carbohydrate.
I don’t know about whole foods, but the Bumble Bee canned Chub Mackerel I can find shows “<1g” (less than 1 gram) which technically means anything from 0 to .9g though usually they just round it up at some point.
In any case, I’d say whatever solution they are storing in would probably be the culprit but they say just water and salt on ingredients list. Other than that, I’ve heard it noted before that animal (including fish) matter still has some carbs, often stored in the muscles (we keep around glycogen in our muscles too, after all), but it’s not usually labeled because it’s typically considered negligible and inconsistent anyway. Some manufacturers may simply account for it, or those particular fish may keep a bit more carbs that other animals.
