Prices updated daily — 3 June 2026
Product type overview
protein bars sits within Biscuits & Cakes, part of Snacks, Biscuits & Confectionery. On this page you compare 340 products from 6 UK supermarkets: Tesco, Sainsbury's, ASDA, Aldi, Morrisons and Waitrose. The lowest unit price for protein bars is £3.47/kg at Sainsbury's. In total, 21 variants of protein bars are compared (different pack sizes and compositions). All prices are normalised to the same unit (per kilogram, per litre or per piece) so that packs of different sizes can be compared fairly — a larger pack is not automatically the best value. The ranking below shows, per variant, which supermarket currently has the sharpest price, including own-label products alongside national brands. Prices refresh daily from the retailers' own public price lists, so you never see stale offers when planning your weekly shop. Allsupers uses no affiliate links or paid placement; the ranking is purely price-based and updated from public data.
Cheapest protein bars
Compare 327 products across 6 supermarkets
protein bars — compare prices across 6 supermarkets
Skinny Whip
Skinny Whip Mint & Dark Chocolate Bars
100 g
£11.50/kg
at 1 supermarket
Skinny Whip
Skinny Whip Toffee Chocolate Bars
100 g
£11.50/kg
at 1 supermarket
Skinny Whip
Skinny Whip Double Chocolate Bars
100 g
£11.50/kg
at 1 supermarket
Skinny Brands
Skinny Brands Mallo Vanilla Flavour Bars 5 x 18g
90 g
£12.22/kg
at 1 supermarket
Skinny Brands
Skinny Brands Protein Peanut Butter Bars 5 x 21g
105 g
£16.38/kg
at 1 supermarket
Quaker Oats
Quaker Oats High Protein Chocolate Brownie Porridge Pot 61g
61 g
£16.39/kg
at 1 supermarket
Buttermilk
Buttermilk Peanut Nougat Choccy Bar 50g
50 g
£19.00/kg
at 1 supermarket
Buttermilk
Buttermilk Caramel Nougat Choccy Bar 50g
50 g
£19.00/kg
at 3 supermarkets
Warrior
Warrior Raw Protein Flapjack-Chocolate Orange
75 g
£20.00/kg
at 1 supermarket
Warrior
Warrior Creatine Bar Chocolate Peanut 75g
75 g
£20.00/kg
at 1 supermarket
Warrior
Warrior Creatine Bar Salted Caramel Brownie 75g
75 g
£20.00/kg
at 1 supermarket
Trek
Trek Peanut Power Protein Energy Bar
55 g
£22.73/kg
at 1 supermarket
Trek
Trek Cocoa Chaos Protein Energy Bar
55 g
£22.73/kg
at 1 supermarket
USN
USN Trust Cookie Bar Double Chocolate Flavour 60g
60 g
£24.67/kg
at 1 supermarket
USN
USN Trust Brownie Bar Dark Chocolate Flavour 60g
60 g
£24.67/kg
at 1 supermarket
Nature Valley
Nature Valley Protein Peanut & Chocolate 40g
40 g
£25.00/kg
at 3 supermarkets
Morrisons
Bounce Choc Coated Peanut Butter Filled Protein Ball Choc Brownie 40g
40 g
£25.00/kg
at 1 supermarket
Morrisons
Bounce Choc Coated Nut Butter Filled Protein Ball Hazelnut Praline 40g
40 g
£25.00/kg
at 1 supermarket
Morrisons
Bounce Chocolate Caramel Filled Protein Ball Millionaire 40g
40 g
£25.00/kg
at 1 supermarket
Fulfil
Fulfil White Choc Cookies & Cream Vitamin & Protein Bar 55g
55 g
£26.36/kg
at 3 supermarkets
NATURE VALLEY
Nature Valley Protein Salted Caramel Nut Cereal Bar 40g
40 g
£27.50/kg
at 2 supermarkets
Grenade
Grenade High Protein Low Sugar Creme Egg Bar
45 g
£27.78/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar White Chocolate Cookie 35g
35 g
£28.57/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Salted Caramel Pretzel 35g
35 g
£28.57/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Blueberry Cheesecake Flavour 35g
35 g
£28.57/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Chocolate Donut Flavour 35g
35 g
£28.57/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Choccy Heaven 35g
35 g
£28.57/kg
at 1 supermarket
The Dinky Protein Bar
The Dinky Protein Bar Birthday Cake
35 g
£28.57/kg
at 1 supermarket
Warrior Crunch
Warrior Crunch High Protein Low Sugar Bar White Chocolate Crisp Flavour 32g
32 g
£31.25/kg
at 1 supermarket
Warrior Crunch
Warrior Crunch Mini Salted Caramel Flavour 32g
32 g
£31.25/kg
at 1 supermarket
Eat Natural
Eat Natural Protein Peanuts & Dark Chocolate Fruit & Nut Bars 40g
40 g
£36.25/kg
at 3 supermarkets
Eat Natural
Eat Natural Protein Peanuts, Almonds & Cocoa Fruit & Nut Bars 40g
40 g
£36.25/kg
at 1 supermarket
Nakd
Nakd Protein Peanut Butter
45 g
£36.67/kg
at 1 supermarket
Nakd
Nakd Peanut Butter Protein Bar 45g
45 g
£36.67/kg
at 1 supermarket
Nakd
Nakd Protein Cocoa Hazelnut
45 g
£36.67/kg
at 2 supermarkets
MyProtein
MyProtein Pop Roll Golden Caramel Flavour 27g
27 g
£37.04/kg
at 2 supermarkets
Myprotein
Myprotein Pop Rolls Captain America 27g
27 g
£37.04/kg
at 1 supermarket
Myprotein
Myprotein Pop Roll Chocolate Caramel 27g
27 g
£37.04/kg
at 1 supermarket
Lexi's
Lexi's Plant-Based Protein Bar Double Choc Chip
40 g
£37.50/kg
at 1 supermarket
Lexi's
Lexi's Plant-Based Protein Bar Blueberry Bliss
40 g
£37.50/kg
at 1 supermarket
Applied Nutrition
Applied Nutrition Protein Wafer Bar Chocolate Caramel
40 g
£37.50/kg
at 1 supermarket
Applied Nutrition
Applied Nutrition Protein Wafer Bar Chocolate & Peanut
40 g
£37.50/kg
at 1 supermarket
Applied Nutrition
Applied Nutrition Protein Wafer Bar Chocolate & Pistachio
40 g
£37.50/kg
at 1 supermarket
Adonis
Adonis Double Choc Crisp Keto Protein Bar 45g
45 g
£37.78/kg
at 1 supermarket
Adonis
Adonis Peanut Caramel Keto Protein Bar 45g
45 g
£37.78/kg
at 1 supermarket
Myprotein
Myprotein Filled Wafer Hazelnut 24g
24 g
£41.67/kg
at 1 supermarket
buttermilk
Buttermilk Plant Powered Gluten Free Vegan Wafer Choc Bar
38 g
£42.11/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Chocolate Orange Flavour 35g
35 g
£42.86/kg
at 1 supermarket
The Dinky Protein Bar
The Dinky Protein Bar The Dinky Protein Bar Peanut Chocolate 35g
35 g
£42.86/kg
at 1 supermarket
MyProtein
MyProtein Marshmallow Crispy Square 30g
30 g
£50.00/kg
at 3 supermarkets