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Preservative Potassium metabisulfite E224
Potassium metabisulfite is a sulfite preservative used to prevent microbial growth and oxidation in food and beverages.
Mineral or nutrientUpdated Feb 27, 2026
Health score-3.0
-5Poor5
Water guidelines
- Legal limit
- Not specified
- Health guideline
- Not specified
Food and supplement guidelines
- Legal limit
- Not specified
- Health guideline
- Not specified
Risks
Irritation, allergic sensitization especially in sulfite-sensitive individuals, potential respiratory irritation, contamination risk due to residual sulfur dioxide
Benefits
Prevents microbial spoilage, inhibits enzymatic and oxidative browning, extends shelf life
References
Waters containing Preservative Potassium metabisulfite E224
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