E222 (sodium hydrosulfite, sodium hydrosulfite)

E222 is sodium hydrosulfite, sodium hydrosulfite. In food technology, this additive is primarily considered a preservative: its task is to slow down spoilage, control the growth of undesirable microorganisms, or maintain product stability during storage.

What is this additive

By nature, E222 is a sulfite preservative. For accuracy, it is important not to confuse it with neighboring E-codes: close numbers often denote salts of the same acid or substances of the same group, but this is not always the same.

Preservatives do not make a product “eternal” and do not fix poor raw materials. They work only within a specific technology: at the right acidity, humidity, temperature, dosage, and sanitary quality of production.

Why it is used

The main mechanism of action: it works against oxidation and microbial spoilage. That is why E222 is used not for taste or nutritional value, but for shelf life, safety, and predictable product quality.

In practice, E222 can be found in products such as wine, juices, dried fruits, potato products, and some ready-to-use ingredients. Specific permitted categories and levels depend on the legislation of the country and the type of product.

Nutrition and metabolism

In normal technological doses, preservatives rarely serve as a significant source of calories, proteins, fats, or carbohydrates. For blood glucose and insulin, the product itself is often more important: sugar, starch, flour, syrups, alcohol, salt, fats, and portion size.

However, frequent consumption of products with preservatives may be a marker of an ultra-processed diet. Therefore, the question is not only about one E-number but about the overall structure of the diet: how many whole foods, proteins, fibers, minerals, and normal foods are in the diet.

Safety and limitations

E222 may be listed under different names, but for the consumer, the key word is sulfite.

Individual tolerance varies. Sensitive individuals may have reactions to specific groups of preservatives, especially sulfites, benzoates, or nitrite-nitrate products; if a repeated reaction occurs, it is advisable to compare symptoms with the label and discuss it with a specialist.

How to read the label

E222 may be indicated on the label as an E number or as a name: sodium hydrosulfite, sodium hydrosulfite. It is better to evaluate it together with the function of the additive, the product category, frequency of consumption, shelf life, and the full composition, rather than making conclusions solely based on the presence of the E-code.