Sodium Bisulfite

International Numbering System (INS) for Food Additives: 222

Food additives Europe numbers: E222

Sodium bisulfite is a common food additive with several functions, but it's important to note that its use can be a bit controversial. Here's a breakdown of its pros and cons:

Functions in food:

• Preservative: Sodium bisulfite helps prevent the growth of bacteria and fungi in foods, extending shelf life [1]. This can be beneficial for things like processed meats, dried fruits, and some wines.
• Antioxidant: It slows down browning caused by enzymes in fruits and vegetables [2]. This helps maintain their fresh appearance.
• Dough conditioner: In small amounts, sodium bisulfite can strengthen dough and improve its handling properties for bakers [3].

Potential downsides:

• Allergy concerns: For some people, especially asthmatics, sodium bisulfite can trigger allergy-like symptoms such as wheezing, hives, and stomach upset [4]. The FDA requires food labels to declare sulfites if they are present at 10 parts per million (ppm) or more [5].
• Limited applications: Due to allergy concerns, its use is restricted or banned in certain foods, such as fresh fruits and vegetables in the United States [6].

Overall:

Sodium bisulfite can be a helpful additive for preserving and enhancing some foods. However, if you have asthma or sulfite sensitivity, it's important to be aware of its presence in foods and check labels carefully.