Canned beans come with a liquid that may be eaten. Do the calories shown on the can reflect the calories with the liquid, or without? Either way, is there a way to know the calories in just the beans or just the liquid (without a calorimeter)?
Calories in bean liquid
beans
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Best Answer
If you want to be certain, I suppose you should ask the canning company.
I can't speak for all countries, but in the U.S., I'm pretty sure the usual nutritional information reflects the total contents (with liquid), unless the nutritional information explicitly specifies "drained," e.g., "Serving Size: 1/2 cup beans (drained)."
The relevant regulation appears to be from the Code of Food Regulations, Title 21, Sec. 101.9(b)(9):
But how do we know whether the bean liquid is "customarily consumed"? For most foods, we can go to this FDA document, which gives instructions for isolating the "edible portion" of foods for nutritional analysis. Alas, that does not help either, since there are no instructions specifically for canned beans. Some canned vegetables are apparently often analyzed drained, but canned beans with sauces (e.g., pork and beans, chili and beans) are explicitly listed with instructions NOT to drain. There's no listing for plain beans.
Yet there's a clue in the USDA nutritional database guidelines (p. 97):
Another clue is in the reference amount for suggested serving size of beans in the FDA regulations, which has the following qualifications:
My experience is that I almost always see 130g as the serving size on canned beans in the U.S., suggesting that they are following the above nutritional guidelines from the FDA and USDA and would include any sauce or canned liquid in nutritional analysis. (Also, in the past I've compared this 130g approximate serving size to the number of servings listed on a typical can of beans, and the only way to get close to the estimated number of servings is by counting the liquid. Usually the beans alone will weigh significantly less than the number of servings.)
Lastly, I would note that in the case of plain beans, the canning liquid likely contains only a small amount of calories anyway. For beans listed as being "in sauce," clearly the implication is that one could consume the "sauce" and therefore any calories in it would be included.
All of that said, the fact that there's no explicit mention of beans in the first two documents I linked leaves a little "wiggle-room," and thus I don't think a bean canning operation would be in violation of U.S. labeling regulations if they drained the beans before calculating nutritional content. (Though I'm not a lawyer, so this is speculation.) But various other documents -- including the other two I cited -- seem to indicate that including bean canning liquid for nutritional purposes is the norm in the U.S.