Erythorbic acid (E315)

No. Erythorbic acid (E315) is not one of the markers Open Food Facts uses to classify a food as processed or ultra-processed, so on its own it doesn't raise a product's NOVA group.

What it is

Antioxidants are substances which prolong the shelf-life of foods by protecting them against deterioration caused by oxidation, such as fat rancidity and colour changes.

A product that contains it can still be ultra-processed for other reasons: 8 of the 8 products here that contain erythorbic acid (E315) (100%) are in group 4 because of other ingredients or additives.

Function

Antioxidant: Antioxidants are substances which prolong the shelf-life of foods by protecting them against deterioration caused by oxidation, such as fat rancidity and colour changes.

Functional class definitions from the EU food additives regulation, via Open Food Facts.

More about erythorbic acid (E315) on Wikidata