Boone’s analysis puts McDonald's Bacon Mayo at 16% of an adult’s daily calories, 50% of the daily salt limit for a child aged 4 to 6 and 1 teaspoons of free sugar.
How many calories are in a McDonald's Bacon Mayo? It contains 329 kcal, 12g of fat (2.5g saturated), 4g of sugar and 1.5g of salt.
Build a full meal with our nutrition calculator
Use the Boone meal calculator to build a full meal rather than view this item on its own. Add fries, a drink, dips and a dessert, then choose your age and sex for a more accurate view of how a Bacon Mayo fits into a day.
Nutrition information
Nutrition information: McDonald's Bacon Mayo
| Energy | 329 kcal |
| Fat | 12g |
| of which saturates | 2.5g |
| Carbohydrate | 35g |
| of which sugars | 4g |
| Salt | 1.5g |
| Protein | 18g |
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 Bacon Mayo contains 329 kcal, which is 16% of the 2,000 kcal adult daily reference intake. It provides 12g of total fat, of which 2.5g is saturated, 4g of sugar, 1.5g of salt and 18g of protein.
The saturated fat content of 2.5g represents 12% of the adult daily guideline of 20g.
McDonald's Bacon Mayo carries a large share of a child’s daily salt
A McDonald's Bacon Mayo contains 1.5g of salt, which is 50% of the daily limit for a child aged 4 to 6.
Adult daily reference intakes (Reference Intake, RI)
Calories2,000 kcal
Total fat70g
Saturated fat20g
Carbohydrate260g
Sugars90g
Fibre30g
Salt6g
Protein50g
Sugar in McDonald's Bacon Mayo
McDonald's Bacon Mayo contains 4g of free sugar per standard serving (1.0 teaspoons). Low sugar
The NHS free sugar limit is 30g per day for adults, 24g for children aged 7 to 10, and 19g for children aged 4 to 6. Free sugar excludes the sugars naturally present in milk and whole fruit. The table below shows how this compares across all age groups.
Free sugar by portion: McDonald's Bacon Mayo
| Portion | Adult (female)
30g | Adult (male)
30g | Age 11 to 17
30g | Age 7 to 10
24g | Age 4 to 6
19g |
|---|
| Per portion | 4g
13% | 4g
13% | 4g
13% | 4g
17% | 4g
21% |
| Teaspoons | 1.0 tsp |
Boone calculates these percentages from McDonald's UK published nutrition data against UK Dietary Reference Values and NHS free sugar and salt limits. Free sugar, salt, calories and saturated fat are limits to stay under; fibre is a target to reach, so a high percentage there is a good thing. For guidance only.
Salt in McDonald's Bacon Mayo
McDonald's Bacon Mayo contains 1.5g of salt per standard serving. Moderate salt
Children have lower salt limits: 3g per day for ages 4 to 6, 5g for ages 7 to 10. The table below shows how this serving compares to daily limits for adults and children.
Salt by portion: McDonald's Bacon Mayo
| Portion | Adult (female)
6g | Adult (male)
6g | Age 11 to 17
6g | Age 7 to 10
5g | Age 4 to 6
3g |
|---|
| Per portion | 1.5g
25% | 1.5g
25% | 1.5g
25% | 1.5g
30% | 1.5g
50% |
Boone calculates these percentages from McDonald's UK published nutrition data against UK Dietary Reference Values and NHS free sugar and salt limits. Free sugar, salt, calories and saturated fat are limits to stay under; fibre is a target to reach, so a high percentage there is a good thing. For guidance only.
Calories in McDonald's Bacon Mayo
McDonald's Bacon Mayo contains 329 kcal per standard serving. Low calorie share
Daily calorie needs vary by age and sex. The table below shows how this serving compares to typical daily reference intakes.
Calories by portion: McDonald's Bacon Mayo
| Portion | Adult (female)
2000 kcal | Adult (male)
2500 kcal | Age 11 to 17
1936 kcal | Age 7 to 10
1553 kcal | Age 4 to 6
1291 kcal |
|---|
| Per portion | 329 kcal
16% | 329 kcal
13% | 329 kcal
17% | 329 kcal
21% | 329 kcal
25% |
Boone calculates these percentages from McDonald's UK published nutrition data against UK Dietary Reference Values and NHS free sugar and salt limits. Free sugar, salt, calories and saturated fat are limits to stay under; fibre is a target to reach, so a high percentage there is a good thing. For guidance only.
Saturated fat in McDonald's Bacon Mayo
McDonald's Bacon Mayo contains 2.5g of saturated fat per standard serving. Low saturated fat
The saturated fat guideline is 20g a day for women and 30g for men, and lower again for children. The table below shows how this serving compares.
Saturated fat by portion: McDonald's Bacon Mayo
| Portion | Adult (female)
20g | Adult (male)
30g | Age 11 to 17
20g | Age 7 to 10
18g | Age 4 to 6
16g |
|---|
| Per portion | 2.5g
12% | 2.5g
8% | 2.5g
12% | 2.5g
14% | 2.5g
16% |
Boone calculates these percentages from McDonald's UK published nutrition data against UK Dietary Reference Values and NHS free sugar and salt limits. Free sugar, salt, calories and saturated fat are limits to stay under; fibre is a target to reach, so a high percentage there is a good thing. For guidance only.
Ultra-processed food: what is really in it
A McDonald's Bacon Mayo Chicken is assembled from 4 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 bacon and mayonnaise.
Reading the ingredient list closely, a McDonald's Bacon Mayo Chicken contains stabilisers and preservatives. These are not used to add nutritional value. Stabilisers maintain a consistent texture in sauces and dressings over time, preventing them from becoming watery or separating during storage and transport. Preservatives extend shelf life by slowing the growth of bacteria, yeasts and moulds in components that are prepared centrally and distributed to restaurants.
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: Bacon Mayo Chicken
Chicken patty
Chicken breast meat in a seasoned breaded coating
Bacon
Smoked bacon, cured with salt and nitrite preservatives
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 Bacon 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 stabilisers and preservatives, 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.
