E392: Extracts of rosemary

What is E392?

Extracts of rosemary are concentrated preparations from the leaves of the rosemary plant, rich in antioxidant compounds, mainly carnosic acid and carnosol. Under E392 they are used for their protective effect rather than their flavour.

Origin and production

Dried leaves are extracted with solvents such as ethanol or supercritical carbon dioxide, and the extract is often deodorised so it does not taste of the herb.

Why is it used?

Rosemary extracts slow down the oxidation of fats and oils, delaying rancid flavours and colour changes. They are popular in snacks and crisps, crackers, biscuits, sauces and frozen pizzas, partly because manufacturers see them as a plant-based alternative to synthetic antioxidants.

Vegan, vegetarian and halal

Extracts of rosemary are derived entirely from a plant and are suitable for vegans and vegetarians. They are not generally associated with halal or kosher concerns, though solvents such as ethanol may matter to some consumers.

Safety and regulation

Extracts of rosemary were authorised as a food additive in the EU in 2010 following an EFSA assessment. Their permitted levels are expressed as the amount of carnosic acid and carnosol in the fat content of the food.

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