Apparently 10 Tbsp of red wine vinegar, for instance, has over 28 calories but just 0.4g carbs, 0.1g protein, and no fat. The numbers for distilled vinegar are even more weird. I'm pretty sure its not very alcoholic but is that where those calories come from?
I just don't know where else to ask this. I'm merely curious for the sake of curiosity. I don't restrict calories and don't consume cup after cup of vinegar but I'm still curious.