Sodium Metabisulfite
Also known as: Sodium pyrosulfite, Sodium disulfite
Anti-caking AgentsAntioxidantsPreservatives
Safety rating
Use Sparingly
Eat Away!Generally SafeUse SparinglyAvoid
Purpose and Function
Sodium metabisulfite is a preservative and antioxidant that extends shelf life by inhibiting microbial growth and preventing oxidation, also used as an anti-caking agent in powdered foods and a stabilizer/sterilizer in winemaking.
Commonly found in
- —Dried fruits and processed foods
- —Wine and beer
- —Powdered starches and spices
Key functions
- —Prevents microbial spoilage
- —Prevents oxidation and enzymatic browning
- —Prevents clumping in powdered foods
Potential Risks and Side Effects
- 01Can cause allergic reactions, particularly in asthmatics sensitive to sulfites — wheezing, shortness of breath
- 02High consumption may cause stomach cramps, nausea, or diarrhea
- 03Powdered form can cause skin irritation on handling