Boone’s analysis puts McDonald's Mayo Chicken at 14% of an adult’s daily calories, 40% of the daily salt limit for a child aged 4 to 6 and 1 teaspoons of sugar.
How many calories are in a McDonald's Mayo Chicken? It contains 282 kcal, 9g of fat (1.5g saturated), 4g of sugar and 1.2g of salt, one of the lower-calorie hot items on the core menu.
Build a full meal with our nutrition calculator
A Mayo Chicken is rarely ordered on its own. Use the calculator below to add fries, a drink, dips and a dessert, and see what the combined order adds up to against daily guidelines for calories, saturated fat, sugar and salt.
Nutrition information
Nutrition information: Mayo Chicken
| Energy | 282 kcal |
| Fat | 9g |
| of which saturates | 1.5g |
| Carbohydrate | 35g |
| of which sugars | 4g |
| Salt | 1.2g |
| Protein | 14g |
Nutrition figures are McDonald’s UK published data, per item as sold and before any optional sauces or extras. Boone converts them to the portion and age comparisons on this page.
A McDonald's Mayo Chicken contains 282 kcal, which is 14% of the 2,000 kcal adult daily reference intake. It provides 9g of total fat, of which 1.5g is saturated, 4g of sugar, 1.2g of salt and 14g of protein.
At 1.5g, the saturated fat content is relatively low for a hot menu item, representing 8% of the adult daily guideline of 20g.
The Mayo Chicken is one of the lowest-calorie hot items on the core menu at 282 kcal, with the lowest saturated fat of any chicken burger at 1.5g.
A moderate choice on calories and saturated fat
A McDonald's Mayo Chicken contains 282 kcal and 1.5g of saturated fat, 8% of the adult daily saturated fat guideline of 20g. The Mayo Chicken is one of the lowest-calorie hot items on the core menu at 282 kcal, with the lowest saturated fat of any chicken burger at 1.5g.
Adult daily reference intakes (Reference Intake, RI)
Calories2,000 kcal
Total fat70g
Saturated fat20g
Total sugars90g (free sugar limit: 30g)
Salt6g
Boone compares each item against EU-wide Reference Intakes for an average adult (2,000 kcal) and the NHS/SACN free sugar and saturated fat guidelines. reference Intakes are EU-wide guideline daily amounts for an average adult (2,000 kcal). The free sugar limit of 30g is the NHS/SACN guideline, which is stricter than the 90g total sugars RI as it excludes naturally occurring sugars in whole foods and dairy.
Sugar, salt and protein by age group
The table below shows how the sugar, salt and protein in a McDonald's Mayo Chicken compares to daily guidelines for different age groups and life stages.
Sugar, salt and protein by age group: McDonald's Mayo Chicken
| Age group | Sugar (g / % limit) | Salt (g / % limit) | Protein (g / % target) |
|---|
| Age 4 to 6 | 4g / 21% | 1.2g / 40% | 14g / 70% |
| Age 7 to 10 | 4g / 17% | 1.2g / 24% | 14g / 50% |
| Age 11 to 17 | 4g / 13% | 1.2g / 20% | 14g / 33% |
| Adult | 4g / 13% | 1.2g / 20% | 14g / 28% |
Boone calculates sugar and salt against NHS/SACN daily limits and protein against estimated daily targets. Boone bands each figure red at 75%+ of the limit, amber at 20-74% and green under 20%. Protein is beneficial and has no upper limit, shown for reference only.
Protein
Mayo Chicken provides 14g of protein. For comparison, a general guide for adult daily protein intake is around 50g, so this item alone provides 28% of that target.
Salt
Mayo Chicken contains 1.2g of salt, 20% of the adult daily limit of 6g. This is a moderate contribution, leaving room within the daily limit for sides and other meals.
Ultra-processed food: what is really in it
A McDonald's Mayo Chicken is assembled from 3 separate components, each manufactured and prepared separately, often at different factories, before being combined and cooked at the point of sale. The most heavily formulated of these are the bun and mayonnaise.
Reading the ingredient list closely, a McDonald's Mayo Chicken contains emulsifiers and stabilisers. These are not used to add nutritional value. Emulsifiers help water-based and fat-based ingredients (such as oil and vinegar in a sauce, or fat and water in a bun dough) blend together and stay blended, rather than separating out. Stabilisers maintain a consistent texture in sauces and dressings over time, preventing them from becoming watery or separating during storage and transport.
None of this means the ingredients are unsafe; all additives used are approved for use in UK food. What it indicates is the degree of industrial formulation involved. A home-cooked equivalent, made from a small number of fresh or minimally processed ingredients prepared in one kitchen, would typically involve far fewer steps and far fewer additives. The version sold at McDonald's reaches a comparable end result using a longer list of industrially processed components, several manufacturing sites, and a number of functional additives designed to keep the product consistent across thousands of restaurants.
What's in it: Mayo Chicken
Bun
Wheat flour, water, sugar, yeast, sesame seeds, rapeseed oil, emulsifiers
Chicken patty
Chicken breast meat in a seasoned breaded coating, fried in vegetable oil
Mayonnaise
Rapeseed oil, water, egg yolk, vinegar, sugar, mustard, stabilisers
Looking at the ingredient list rather than just the nutrition panel tells a different story. Even where individual macros (sugar, salt, calories) look moderate, the number of separately manufactured components, and the additives used to bind, emulsify, preserve, colour and flavour them, place almost every hot item on the McDonald's menu in the most processed food category under the NOVA classification system.
Processing (NOVA classification)
A McDonald's Mayo Chicken falls into NOVA group 4, ultra-processed food. The NOVA classification system groups foods by the extent and purpose of the processing involved, rather than by their individual nutrients. Group 4 covers products that are formulated mostly or entirely from substances derived from foods, plus additives, using a series of industrial processes with little or no whole food remaining recognisable in the final product. In this item, that includes emulsifiers and stabilisers, on top of the breaded or formed proteins, processed cheese and multi-stage assembly typical of the menu. This classification applies to almost all hot menu items at McDonald's, and indeed to most fast food and packaged convenience food generally; it is not a finding specific to this item.
Ingredients
McDonald's Mayo Chicken is assembled from 4 separately manufactured components.
Ingredients by component: McDonald's Mayo Chicken
Regular bun
WHEAT flour, water, sugar, yeast, rapeseed oil, salt, WHEAT fibre, emulsifier, pea protein, WHEAT starch, WHEAT maltodextrin, dextrose, maize maltodextrin, maize starch, antioxidant.
Chicken patty
chicken breast meat (43-44%), water, vegetable oils (sunflower, rapeseed), maize flour, WHEAT flour, starches, WHEAT breadcrumb, WHEAT semolina, WHEAT gluten, natural flavourings (contain CELERY and WHEAT), dried glucose syrup, potassium chloride, salt, pepper, raising agents, dextrose, CELERY.
Lettuce
100% iceberg lettuce.
Cool Mayo
water, rapeseed oil (23.5%), spirit vinegar, modified maize starch, free range EGG yolk (3%), sugar, salt, MUSTARD flour, acid, thickener (xanthan gum), preservative, lemon juice concentrate.
McDonald's lists more than one approved formulation for the bun and chicken patty; the version shown is the primary one and the allergen table below covers all variants. Ingredients taken from the McDonald's UK product page, retrieved 17 August 2026. Recipes change - always check in restaurant before ordering if you have an allergy.
Allergens at a glance
McDonald's Mayo Chicken contains wheat, eggs, celery and mustard.
Allergen information: McDonald's Mayo Chicken
| Allergen | Status |
|---|
| Wheat | Contains |
| Rye | May contain traces |
| Barley | May contain traces |
| Oats | Not present |
| Sesame | May contain traces |
| Soya | Not present |
| Milk | May contain traces |
| Eggs | Contains |
| Fish | Not present |
| Crustaceans | Not present |
| Celery | Contains |
| Mustard | Contains |
| Molluscs | Not present |
| Lupin | Not present |
Contains = declared as an ingredient. May contain traces = McDonald's states the allergen cannot be excluded. McDonald's prepares food in kitchens where all 14 major allergens are present and equipment is shared, so no item can be guaranteed allergen free, even when ingredients are removed on request. Buns, rolls and tortilla wraps are toasted in the same toaster as sesame-topped buns.
