Figures from McDonald's UK nutrition calculator, 17 to 18 August 2026 , collected by Boone
Bacon Mayo, as published. Calorie split calculated by Boone. How
The Bacon Mayo as published, seen four ways.
0 of 3 limits are over 30% in one burger, the UK front-of-pack mark for high.
Nothing here passes 30% of an adult’s daily limits in one burger.
Lower saltMayo Chicken →0.92g salt (15%), 282 kcalNHS limits by age: salt goes from 25% for an adult to 50% at age 4 to 6.
For age 4 to 6, salt is the bigger share: 1.5g is 50% of the day’s 3g limit in one burger.
Lower-salt swapMayo Chicken →0.92g salt, 31% of the 3g limitFor age 7 to 10, salt is the bigger share: 1.5g is 30% of the day’s 5g limit in one burger.
Lower-salt swapMayo Chicken →0.92g salt, 18% of the 5g limitFor age 11 to 17, salt is the bigger share: 1.5g is 25% of the day’s 6g limit in one burger.
Lower-salt swapMayo Chicken →0.92g salt, 15% of the 6g limitProtein counts in your favour here, but the saturated fat is still 12% of the adult limit.
18g of protein, #44 on the menu. Per calorie the Chicken Selects (5 pieces) gives more: 7.0g per 100 kcal against 5.5g.
Most protein per calorieChicken Selects (5 pieces) →39g protein in 560 kcalHere the 600mg of sodium counts as useful after sweaty exercise.
35g of carbohydrate, with 33% of the energy from fat.
Natural sugars in milk, fruit and veg don’t count. NHS →
For smaller portions: the most nutrition per calorie, against all 151 McDonald's items.
More protein per calorie than 73% of the 151 items on the menu.
McDonald's does not publish vitamins or minerals for this item, so Boone does not estimate them.
The 2018 model indicates this burger is not less healthy: it scores 3, below the line of 4.
Higher is less healthy; 4 or more would be classed as less healthy under this model. How the score works →
Joint #39 of 151 on the menu for this score (lower is better).
UK Nutrient Profiling Model 2018 →
Hamburger 13g protein, 1.1g salt255Mayo Chicken 12g protein, 0.92g salt282
Cheeseburger 16g protein, 1.4g salt303
Filet-O-Fish 14g protein, 1.4g salt316
Bacon Mayo 18g protein, 1.5g salt329
McChicken Sandwich 17g protein, 1.2g salt371
McPlant 19g protein, 2.1g salt426
Double Cheeseburger 27g protein, 2.1g salt452329 kcal as published. 329 kcal is 16% of a 2,000 kcal adult reference intake.
For a child aged 4 to 6 it is 50% of the day’s 3g salt limit and 21% of the 19g free sugar limit in one item. A Mayo Chicken has 0.92g of salt, 31% of that salt limit.
4g of total sugar as published. Boone estimates 4g of it is free sugar: 1.0 teaspoons and 13% of an adult’s 30g daily maximum.
18g, 5.5g per 100 kcal. It ranks #44 of 151 items on the menu for protein. The Chicken Selects (5 pieces) gives the most protein for the calories, 7.0g per 100 kcal.
3 on the UK Nutrient Profiling Model 2018, calculated by Boone per 100g. Scores run from -20 to 40, and the higher the score, the less healthy the model rates the food. Foods scoring 4 or more would be classed as less healthy under this model.
As published, wheat, sesame, soya and mustard. Rye, barley and milk may be present.
Source. McDonald's UK nutrition calculator, 17 to 18 August 2026 , per item as sold.
Collected. Copied by Boone from McDonald's’s published figures. Data checks are led by Murray Dare.
Calculated by Boone. Labelled where it appears.
Limits. NHS free sugar and salt limits by age; UK reference intakes for adults.
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