What is “sulphured” fruit?
This question comes in some form every year, and it’s always worth answering because the answer is, well, fun. Any time you set out to buy dried or candied fruit you can count on seeing labels that say things like “Naturally Unsulphured!” which has to be good, right? But then what is “sulphuring” anyway, and is it really a bad thing?
The process of sulphuring has to do with plant enzymes. Enzymes are and always have been a major headache for fruit eaters, since they cause picked fruit to brown and soften. And that’s a bummer if you’re the type of person that likes to make picked fruit last. Humans have expended lots of time and energy over the millennia trying to figure out ways to shut enzymes down (even if they didn’t realize what enzymes were). But then what are these browning enzymes doing in fruit in the first place? The answer is because they’re a key part of a plant’s natural pest control system.
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