I'm curious to know if preservatives add calories to food...
Particularly, I bought a bag of raisins. The only ingredient other then the grapes is sulphur dioxide, and in brackets, the label explains that this was added as a preservative. Does it add extra calories to the raisins?
I feel a little silly asking this question
P.S. Before posting this questions, I tried to find an answer on Google. All I got was a warning that long-term ingestion of sulphur dioxide can be harmful. It didn't explain how, or why.