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What are sulfites?

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Sulfites are a common additive in many foods and drugs. Sulfites also occur naturally in some foods.

"Sulfites" is the general name for six specific substances:

  • Sulfur dioxide
  • Sodium sulfite
  • Sodium bisulfite
  • Sodium metabisulfite
  • Potassium bisulfite
  • Potassium metabisulfite

From: Asthma and Sulfite Allergies WebMD Medical Reference

SOURCES: American Academy of Allergy, Asthma, and Immunology web site: "Sulfite Sensitivity." American Medical Association, 1998. Grayson MH and Holtzman MJ, "Asthma," 2005 Monro, T.  
Essential Guide to Asthma,ACP Medicine,. , published online Aug. 6, 2012.

 

Reviewed by Dan Brennan on August 18, 2019

SOURCES: American Academy of Allergy, Asthma, and Immunology web site: "Sulfite Sensitivity." American Medical Association, 1998. Grayson MH and Holtzman MJ, "Asthma," 2005 Monro, T.  
Essential Guide to Asthma,ACP Medicine,. , published online Aug. 6, 2012.

 

Reviewed by Dan Brennan on August 18, 2019

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How do sulfites work as additives?

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