Digestoa
Additive · Preservative

Sodium sulphite (E221)

Sodium sulphite (E221) is a preservative that Digestoa flags as moderate risk. Common concerns include asthma triggers.

Digestoa riskModerate risk
TypePreservative
Found inpackaged meats, baked goods, soft drinks and other long-shelf-life foods
ConcernsAsthma triggers

What is Sodium sulphite?

Sodium sulphite (E221) is a preservative — used to extend shelf life and stop spoilage.

Is Sodium sulphite bad for you?

Digestoa flags Sodium sulphite as moderate risk. Regulators permit it, but safety reviews and studies have raised concerns including asthma triggers. How often you eat it matters more than a single exposure.

What foods contain Sodium sulphite?

Packaged meats, baked goods, soft drinks and other long-shelf-life foods.

Digestoa's take

You don't need to panic over a single product that contains Sodium sulphite. But it's a useful flag: when you see E221 on a label it often signals a more processed product, and there's usually a cleaner alternative.

Safer swaps

Choose fresher items with shorter shelf lives, or naturally preserved products.

Frequently asked questions

Is E221 the same as Sodium sulphite?
Yes — E221 is the international additive (E-number) code for Sodium sulphite.
Is Sodium sulphite bad for you?
Digestoa flags Sodium sulphite (E221) as moderate risk. It's permitted in food, but it's associated with concerns such as asthma triggers.
What are the side effects of Sodium sulphite?
Reported concerns include: Asthma triggers.
What foods contain Sodium sulphite?
Packaged meats, baked goods, soft drinks and other long-shelf-life foods.
How can I avoid Sodium sulphite?
Check the ingredients list for "Sodium sulphite" or "E221", or scan the product with Digestoa to see if it's present before you buy.

Related preservative additives

Potassium nitrite (E249)Sodium nitrite (E250)Sodium nitrate (E251)Potassium nitrate (E252)Benzoic acid (E210)Sodium benzoate (E211)

Risk ratings reflect Digestoa's editorial assessment synthesising EFSA/IARC opinions and peer-reviewed research. Informational only — not medical advice.