Ingredient
Potassium Metabisulphite
What is Potassium Metabisulphite?
Potassium Metabisulphite is a chemical compound commonly used as a preservative and antioxidant. It is typically made by treating potassium hydroxide with sulfur dioxide.
This ingredient is employed in food and drinks to prevent spoilage and preserve color. While generally considered safe, some individuals may experience sensitivity, particularly those with asthma, as it can release sulfur dioxide, a known respiratory irritant.
If you see Potassium Metabisulphite on a label, it’s used to maintain the quality and shelf life of the product, though its presence might be of concern for some people with sensitivities.
Commonly found in: wines, beer, fruit juices, dried fruits, pickled foods, condiments
What to watch
- Can cause respiratory reactions in sensitive individuals, especially those with asthma.
- May cause allergic reactions or hypersensitivity in some people.
Benefits
- Helps maintain color and freshness in food and beverages.
- Prevents microbial growth in products, extending shelf life.
Approved for use in food, but must be declared on labels, especially for wines, due to potential allergic reactions.
Studies indicate it's generally safe for the majority of the population, but more research is needed on its long-term effects.
Potassium Metabisulphite is synthetically produced and is not derived from animal sources, so it's generally considered vegan-friendly.
Sources: Food Additive Status List · Evaluation of certain food additives
Scout's take
Potassium metabisulphite is a preservative that may cause sensitivities in some individuals and is used to extend shelf life.
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