Sodium Metabisulfite
This is what the ingredient is.
Sodium metabisulfite is an inorganic compound used as a preservative and antioxidant. It releases sulfur dioxide when dissolved in water.
Here is why it shows up on the label.
Used as a preservative, antioxidant, and bleaching agent in dried fruits, wine, and processed foods. Prevents enzymatic browning and microbial growth.
Here is what food agencies say.
The FDA has approved it and requires labeling.s for sulfite content above 10 ppm. European food agencies permit use, with a suggested daily limit of up to 0.7 milligrams per kilogram of body weight as SO2 equivalent.
Here is what research has found.
WHO/FAO an FAO/WHO expert committee evaluated safety in 2018. Studies confirm antimicrobial efficacy. Must be declared on labels due to sulfite sensitivity concerns.
Here are a few things worth knowing.
Can trigger severe reactions in sulfite-sensitive individuals, particularly asthmatics. May cause headaches, breathing difficulties, and skin reactions in sensitive people.
Sources
- FDA CFR 21
- EFSA Scientific Opinion 2016
- WHO/FAO JECFA
How to read this page
We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.