Is it ultra-processed?
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Is Heinz Mayomust Mayo Mustard Sauce ultra-processed?

400g, 400ml Mayonnaises Sold in the United Kingdom

Pack of Heinz Mayomust Mayo Mustard Sauce

Yes, it's ultra-processed

  1. 1 Unprocessed
  2. 2 Kitchen staple
  3. 3 Processed
  4. 4 Ultra-processed

Signs of ultra-processing in its ingredients:

  • 17 ingredients
  • 3 additives
  • Nutri-Score D

Less processed mayonnaises

Less processed isn't automatically healthier, so compare the labels for what matters to you, such as sugar or salt.

Ingredients

Ultra-processing Processing signs are highlighted

Sunflower Oil, Mustard 15% (Water, Mustard Seeds, Spirit Vinegar, Salt, Sugar, Spices), Spirit Vinegar, Egg Yolk, Sugar, Modified Cornflour, Lemon Juice From Concentrate, Salt, Carotenes, Xanthan Gum, Calcium Disodium EDTA

Additives: E160a Carotene , E385 Calcium disodium ethylenediaminetetraacetate , E415 Xanthan gum

As written on the pack

Sunflower Oil, Mustard 15% (Water, Mustard Seeds, Spirit Vinegar, Salt, Sugar, Spices), Spirit Vinegar, Egg Yolk, Sugar, Modified Cornflour, Lemon Juice From Concentrate, Salt, Colour (Carotenes), Thickener (Xanthan Gum), Antioxidant (Calcium Disodium EDTA).

What makes it ultra-processed

Cosmetic additives

Added to change how the food looks, feels or tastes, not to keep it safe. A hallmark of ultra-processed food.

  • E160a Carotene Carotenes are orange-yellow pigments, either synthesised or extracted from carrots, algae or palm oil.
  • E415 Xanthan gum Xanthan gum is a thickener made by fermenting sugar with the bacterium Xanthomonas campestris.

Substances rarely used in home kitchens

Refined or extracted in factories, such as syrups made from starch or isolated proteins. The other hallmark of ultra-processed food.

  • Modified flour An ingredient mostly produced industrially and rarely used in home kitchens.
3 ingredients that would only make it processed

Kitchen staples like sugar, salt and oil. On their own they make a food processed, not ultra-processed.

  • Salt Salt, added for taste and preservation.
  • Sugar Sugar refined from sugar cane or beet.
  • Vegetable oil Vegetable oils are pressed or extracted from seeds, nuts and fruits.

How the NOVA groups work

Among 239 mayonnaises

From least to most processed, this one ranks 172nd. 72% of the mayonnaises here are ultra-processed.

Ranked by NOVA group, then by the number of ultra-processing signs, additives and ingredients. Our ordering, not part of NOVA.

All 239 mayonnaises, least processed first

About this information

  • Data from this product on Open Food Facts (barcode 5000157147530, last edited 16 August 2026), available under the Open Database License. If something is wrong or the recipe has changed, you can correct it there.
  • Photo: Open Food Facts contributors, CC BY-SA 3.0.
  • The NOVA group is an automated estimate from crowdsourced data: a missing or mistyped ingredient can change it.
  • NOVA measures processing, not nutrition. For nutrition, Open Food Facts gives this product a Nutri-Score of D (from A, best, to E).
  • General information, not medical or dietary advice. Check the pack if you have an allergy.