Sainsbury

Silverskin Onions

Barcode 00285254

Scanned 6 times by Nomi users

Yes — Silverskin Onions is ultra-processed.

Classified as ultra-processed because it contains sodium metabisulphite, a preservative additive used to maintain color and shelf life, which falls under NOVA ultra-processed ingredients. Other ingredients (onions, water, spirit vinegar, sugar, sulphites as an allergen indication) are minimally processed or basic culinary ingredients, but the presence of the preservative makes the overall product UPF.

Ingredients

1 ultra-processed marker

OK

onions

A bulbous vegetable used as a staple aromatic and flavoring in many cuisines.
OK

water

Essential base ingredient for countless foods and beverages; serves as solvent and texture modifier.
UPF

sodium metabisulfite

A chemical preservative and antioxidant used in foods and beverages to prevent oxidation and browning; commonly used to preserve dried fruits, wine, and processed foods.
OK

spirit vinegar

A clear, distilled vinegar typically made from fermented alcohol (ethanol) and used for pickling, flavoring, and preservation.
OK

sugar

Granulated sugar derived from sugarcane or sugar beets; a basic, single-ingredient sweetener.
OK

(sulphites)

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Other fruit & vegetables Nomi has checked — these ones aren't ultra-processed.

Common questions about Silverskin Onions

Is Silverskin Onions ultra-processed?

Yes — Silverskin Onions by Sainsbury is ultra-processed, so it counts as a UPF (ultra-processed food). Classified as ultra-processed because it contains sodium metabisulphite, a preservative additive used to maintain color and shelf life, which falls under NOVA ultra-processed ingredients. Other ingredients (onions, water, spirit vinegar, sugar, sulphites as an allergen indication) are minimally processed or basic culinary ingredients, but the presence of the preservative makes the overall product UPF.

Which ingredients in Silverskin Onions are ultra-processed?

Nomi flags one ingredient in Silverskin Onions as an ultra-processed marker: sodium metabisulfite. See the full ingredient breakdown above for what each one is.

What does "ultra-processed" (UPF) mean?

Ultra-processed foods (UPFs) are industrial formulations made with ingredients and additives you wouldn't find in a home kitchen — such as emulsifiers, artificial flavourings, colourings and modified starches. The classification is based on the NOVA system used by researchers and dietitians worldwide.

How can I check whether other foods are ultra-processed?

Scan any barcode — or photograph the ingredients label — with the free Nomi app for iOS and Android. You'll get an instant ultra-processed verdict with every ingredient explained in plain English.

Product information comes from public databases and Nomi's own analysis, and may contain errors. Always check the packaging. Ultra-processed classification is based on the NOVA food processing system.