How Does Sodium Metabisulfite Affect People With Sulfite Allergies?

Sodium metabisulfite is a common food preservative and can trigger allergic reactions in people with sulfite allergies. Sulfite allergies are caused by an immune system response to sulfur-containing compounds, including sulfites. Symptoms of a sulfite allergy can include hives, itching, swelling, breathing difficulties, and in severe cases, anaphylaxis.

People with sulfite allergies should avoid foods that contain sodium metabisulfite and other sulfites. These can include dried fruits, wine, beer, processed meats, shrimp, and some medications. It's important to carefully read labels and ask about ingredients when dining out to prevent accidental exposure. If you have a known sulfite allergy, it's recommended that you carry an epinephrine auto-injector (such as an EpiPen) at all times in case of a severe reaction.