Leon publishes total sugar for every item, but total sugar includes the lactose in milk and the sugar in whole fruit, which health guidance does not limit. Boone separates free sugars, the added and syrup sugars capped at 30g a day for an adult, and ranks all 166 items on that basis.
A regular whole-milk Latte shows 13.4g of total sugar but 0g of free sugar. At the other end, the Blueberry, Lemon and Poppy Seed Muffin carries 37g, and 31 items on the menu have no free sugar at all.
All 10 Leon UK items in this section, ranked by sugar from highest to lowest. The Blueberry, Lemon and Poppy Seed Muffin is highest at 37g and the Blueberry and Yuzu Blondie is lowest at 14.5g.
All 28 Leon UK items in this section, ranked by sugar from highest to lowest. The Mango, Lime and Dragon Fruit Smoothie is highest at 32.8g and the Iced Unsweetened Matcha Latte (Whole Milk, Regular) is lowest at 0g.
All 44 Leon UK items in this section, ranked by sugar from highest to lowest. The Banana and Cinnamon Porridge (Almond Milk) is highest at 21.5g and the The Salmon Breakfast Box is lowest at 0g.
All 28 Leon UK items in this section, ranked by sugar from highest to lowest. The Hot Chocolate (Whole Milk, Large) is highest at 20.7g and the Peppermint Tea is lowest at 0g.
All 23 Leon UK items in this section, ranked by sugar from highest to lowest. The Honey Sriracha Sauce Pot is highest at 17g and the Vegan Aioli Pot is lowest at 0g.
All 24 Leon UK items in this section, ranked by sugar from highest to lowest. The Crunchy Korean Chicken Wrap is highest at 7g and the Brazilian Black Bean Small Box is lowest at 0.5g.
All 9 Leon UK items in this section, ranked by sugar from highest to lowest. The Kids Banana and Chocolate Porridge (Almond Milk) is highest at 6.5g and the Kids Plain Porridge (Cow's Milk) is lowest at 0g.
Figures are per portion as served, from the LEON Foodie Fact Sheet and Barista Drinks Menu, September 2026 v1, issued 16 September 2026, checked September 2026.
Boone derives free sugars rather than using the total sugar Leon publishes. Lactose in cow's milk is deducted at 1.3g per gram of milk protein in drinks, and the sugar in whole fruit, vegetables and milk-based ingredients is estimated from each food's ingredient list. Sugars in oat, soya, coconut and almond drinks, juices, purées, syrups and honey are counted as free. These are estimates, explained on each item page.
Every barista drink is listed with whole milk, Leon's standard, or black where Leon serves it without milk. Skimmed, oat, soya and coconut versions have their own pages and can be compared in the calculator on any item page. Flavour syrups are add-ons and are not ranked on their own.
NHS daily free sugar limits are 30g for adults and ages 11 and over, 24g for ages 7 to 10 and 19g for ages 4 to 6.