Potassium nitrate (E252)

What is Potassium nitrate?

Potassium nitrate (E252) is a preservative — used to extend shelf life and stop spoilage.

Is Potassium nitrate bad for you?

Digestoa flags Potassium nitrate as high risk. Regulators permit it, but safety reviews and studies have raised concerns including nitrosamine formation. How often you eat it matters more than a single exposure.

• Nitrosamine formation

What foods contain Potassium nitrate?

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 Potassium nitrate. But it's a useful flag: when you see E252 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

Related preservative additives

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