Sulfite
SO3 2-
Sulfites are a type of preservative commonly used in the food and beverage industry to prevent spoilage, discoloration, and bacterial growth. Sulfites are also naturally occurring chemicals found in some foods such as wine, dried fruits, and some vegetables.
Sulfites are generally safe for most people, however, some individuals may develop an allergic reaction to sulfites. Symptoms of sulfite allergy include hives, itching, swelling, difficulty breathing, and anaphylaxis, a life-threatening emergency.
In the United States, the Food and Drug Administration (FDA) mandates that products containing more than 10 parts per million (ppm) of sulfites be labeled with a warning statement. Foods such as wine, beer, pickled foods, and some processed foods are commonly labeled with sulfite warnings.
People with known sulfite allergies should avoid foods containing sulfites and be cautious when eating out. It is also important to read food labels carefully to check for ingredients that may contain sulfites. If you suspect you have a sulfite allergy, consult with your healthcare provider for further evaluation and management.
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