View full-size photo · Photo: Open Food Facts contributors, CC BY-SA
Prawn Mayo
Prawn Mayo by M&S provides 180 kcal per 100 g, with 2 g of sugars and 10.1 g of protein. That is 56% less sugar than the average product in this category. Its Nutri-Score is C and it is classified as NOVA 4 (ultra-processed food). It is listed in the Breads category. Contains: crustaceans, fish, gluten, mustard.
Nutrient levels per 100 g
Levels use UK front-of-pack reference thresholds.
Nutrition facts
| Nutrient | Per 100 g | Category avg |
|---|---|---|
| Calories | 180 kcal | 286 −37% |
| Total fat | 5.8 g | 5.3 +10% |
| Saturated fat | 0.6 g | 1 −37% |
| Carbohydrates | 20.5 g | 48.4 −58% |
| Total sugars | 2 g | 4.6 −56% |
| Added sugars | 0 g | 2.6 −100% |
| Dietary fiber | 2.7 g | 4.5 −40% |
| Protein | 10.1 g | 9.6 +6% |
| Salt | 1.1 g | 1.3 −14% |
*% Daily Value for 100 g, based on a 2,000-calorie diet (FDA reference values). Category average across 15572 Breads products on Foodmetria.
Compared with other breads
Bar shows the share of products in this category that contain less of the nutrient.
Ingredients
Prawns (Crustacean) (40%) - Wheatflour contains Gluten (with Wheatflour, Calcium Carbonate, Iron, Niacin, Thiamin) Water Rapeseed Oil - Malted Wheatflakes (contain Gluten) Wheat Bran (contains Gluten) Salt Pasteurised Egg Yolk Cornflour Yeast (Yeast Vitamin D Yeast) - Dried Egg Malted Barley Flour (contains Gluten) White Wine Vinegar Emulsifier: E471, E472e Wheat Gluten Vinegar. Concentrated Lemon Juice - Malted Wheatflour (contains Gluten) - Mustard Extract - Cracked Black Pepper Sugar Flour Treatment Agent: Ascorbic Acid. Palm Fat Palm Oil Wheat Starch (contains Cluten). Potato Starch Colour: Paprika Extract. 0 For allergens see ingredients in bold. 100% of M&S Fish and Shellfish is responsibly sourced. Find out more about sourcing at marksandspencer.com/fish
- Allergens
- CrustaceansFishGlutenMustard
Additives 4
Overexposure risk is based on EFSA evaluations as recorded by Open Food Facts.
Product details
- Labels & certifications
- FSC
- Sold in
- United Kingdom
- Barcode
- 0004932590899
Prices reported by shoppers
Loading prices…
Frequently asked questions
How many calories are in Prawn Mayo?
Prawn Mayo contains 180 kcal per 100 g.
How much sugar is in Prawn Mayo?
Prawn Mayo has 2 g of sugars per 100 g, which is considered low by UK front-of-pack guidelines.
Is Prawn Mayo healthy?
It has a Nutri-Score of C (A is best, E is worst); it is in NOVA group 4 — ultra-processed food. Scores describe nutritional quality and processing, not suitability for your individual diet.
Is Prawn Mayo vegan?
Based on its ingredient list, it is not vegan.
What allergens does Prawn Mayo contain?
According to the label data it contains: Crustaceans, Fish, Gluten, Mustard. Recipes change — always check the package label.
Source: Open Food Facts (ODbL). Last updated March 27, 2026. Spotted a mistake? Edit this product on Open Food Facts. Not medical advice — always check the package label.
Reviews
Compare & rankings
Healthier alternatives
Best in category →Same category, meaningfully better on at least one measure and no worse on the others. Each card shows what improves.
a 
a NOVA 1 
a NOVA 3 
a NOVA 1 More breads
View all →
b NOVA 4 
e NOVA 4 
c NOVA 4 
b NOVA 4 
b NOVA 3 
b NOVA 3 More from M&S
View all →
a NOVA 4 
c NOVA 1 
b NOVA 4 
d NOVA 3 
e 
a NOVA 1