Potassium Metabisulfite
Also known as: Potassium pyrosulfite, Dipotassium disulfite
AntioxidantsPreservativesLeavening Agents
Safety rating
Use Sparingly
Eat Away!Generally SafeUse SparinglyAvoid
Purpose and Function
Potassium Metabisulfite inhibits microbial growth and oxidation in wines, ciders, and fruit juices, maintains color in dried fruits and seafood, and stabilizes beer during brewing.
Commonly found in
- —Wines, ciders, and fruit juices
- —Dried fruits
- —Frozen seafood (e.g. shrimp)
- —Beer
Key functions
- —Inhibits microbial growth and oxidation
- —Preserves color and appearance
Potential Risks and Side Effects
- 01Can cause allergic reactions, particularly in those with asthma or sulfite sensitivity — wheezing, skin rashes, hives
- 02Sulfite-sensitive individuals may experience headaches, nausea, or digestive issues
- 03Can degrade thiamine (vitamin B1) in treated foods