Eat or Avoid
E221

Sodium Sulfite

Also known as: Sodium Sulphite

AntioxidantsPreservatives

Safety rating

Use Sparingly

Eat Away!Generally SafeUse SparinglyAvoid

Purpose and Function

Sodium sulfite is a preservative and antioxidant that inhibits bacterial, yeast, and fungal growth while preventing oxidative discoloration, also used as a bleaching agent in some food processing.

Commonly found in

  • Dried fruits
  • Processed potatoes
  • Wine

Key functions

  • Prevents microbial spoilage
  • Preserves color and flavor by preventing oxidation

Potential Risks and Side Effects

  1. 01Can trigger allergic reactions in sulfite-sensitive individuals, particularly asthmatics — wheezing, shortness of breath, rare anaphylaxis
  2. 02High levels may cause gastrointestinal discomfort
  3. 03Can degrade thiamine (vitamin B1) in foods

References

    Related Additives