There are now two new articles on this site about sulfites.
We were getting a lot of questions about sulfites, especially related to wine, so we now have more information.
One article is a general discussion of sulfites.
The other article has a long list of foods that contain sulfites.
Sulfites are in many foods. I had no idea until I started researching this subject.
This makes diagnosing a sulfites allergy tricky.

{ 2 comments… read them below or add one }
I have been trying for years to find out a couple of questions.Possibly you can help? i have a jar of the hottest horseradish in the world and it says natually ocurring sulfiting agents.i’m guessing that is what makes it lots hotter than regular horseradish? And if so,What kind are they adding to it? thanks, kurt
Hi Kurt,
I’m not an expert on horseradish … here’s what I suspect.
Most likely, the “naturally occurring sulfiting agents” are a byproduct of fermentation when the horseradish is made. It could also be that it’s added as a preservative. Words like “natural” are always suspect in marketing, especially when it comes to food.
I can’t answer your question about if it makes the horseradish hotter.