Prices updated daily — 8 October 2026
Product type overview
protein bars sits within Biscuits & Cakes, part of Snacks, Biscuits & Confectionery. On this page you compare 446 products from 9 UK supermarkets: Aldi, ASDA, Co-op, Iceland, Morrisons, Ocado, Sainsbury's, Tesco and Waitrose. The lowest unit price for protein bars is £2.78/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 443 products across 9 supermarkets
protein bars — compare prices across 9 supermarkets
Unbranded
Flapjax Chocolate Flavour Coating Protein Flapjack Bar 120g
120 g
£6.67/kg
at 1 supermarket
Skinny Dream
Skinny Dream Choc, Peanut & Caramel Bars 5 x 24g
120 g
£8.33/kg
at 2 supermarkets
Skinny Whip
Skinny Whip 5 x 20g Chocolate Hazelnut Multipack Bars
100 g
£9.50/kg
at 3 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
Buttermilk
Buttermilk Caramel Nougat Choccy Bar 50g
50 g
£20.00/kg
at 3 supermarkets
Tribe
Tribe Protein & Focus Choc Brownie 60g
60 g
£20.83/kg
at 4 supermarkets
Tribe
Tribe Protein & Focus Peanut Butter Choc Chip 60g
60 g
£20.83/kg
at 5 supermarkets
Nakd
Nakd Protein Peanut Butter
45 g
£22.22/kg
at 1 supermarket
TESCO
Tesco Protein Bites Peanut & Cocoa 45G
45 g
£22.22/kg
at 1 supermarket
TESCO
Tesco Protein Bites Almond & Raspberry 45G
45 g
£22.22/kg
at 1 supermarket
Trek
Trek Peanut Power Wholefood Energy Bar 55g
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 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 2 supermarkets
Muscle Moose
Muscle Moose The Dinky Protein Bar White Chocolate Cookie 35g
35 g
£25.71/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Salted Caramel Pretzel 35g
35 g
£25.71/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Blueberry Cheesecake Flavour 35g
35 g
£25.71/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Chocolate Donut Flavour 35g
35 g
£25.71/kg
at 1 supermarket
Muscle Moose
Muscle Moose The Dinky Protein Bar Choccy Heaven 35g
35 g
£25.71/kg
at 1 supermarket
Grenade
Grenade High Protein Low Sugar Creme Egg Bar
45 g
£27.78/kg
at 1 supermarket
Nakd
Nakd Protein Bar Peanut Butter 45g
45 g
£27.78/kg
at 2 supermarkets
The Chia Charge
Chia Charge Protein Bite White Choc & Raspberry
50 g
£28.00/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
Bounce
Bounce Gluten Free Choc Brownie Protein Ball
40 g
£31.25/kg
at 1 supermarket
Bounce
Bounce Gluten Free Millionaire Protein Ball
40 g
£31.25/kg
at 1 supermarket
Morrisons
Bounce Choc Coated Nut Butter Filled Protein Ball Hazelnut Praline 40g
40 g
£31.25/kg
at 1 supermarket
Morrisons
Bounce Chocolate Caramel Filled Protein Ball Millionaire 40g
40 g
£31.25/kg
at 1 supermarket
Bounce
Bounce Dipped Caramel Millionaire Protein Ball
40 g
£31.25/kg
at 1 supermarket
Bounce
Bounce Dipped Hazelnut Praline Protein Ball
40 g
£31.25/kg
at 1 supermarket
Bounce
Bounce Dipped Peanut Caramel Protein Ball
40 g
£31.25/kg
at 1 supermarket
Bounce
Bounce Dipped Choc Brownie Protein Ball
40 g
£31.25/kg
at 1 supermarket
Bounce
Bounce Filled Cookie Dough Protein Ball
40 g
£31.25/kg
at 1 supermarket
Applied Nutrition
Applied Nutrition Protein Milk Chocolate Caramel Wafer 39g
39 g
£32.05/kg
at 1 supermarket
Applied Nutrition
Applied Nutrition Protein Milk Chocolate Peanut Wafer 39g
39 g
£32.05/kg
at 1 supermarket
Bounce
Bounce Gluten Free Peanut Protein Ball
35 g
£35.71/kg
at 1 supermarket
Bounce
Bounce Filled Salted Caramel Ball
35 g
£35.71/kg
at 1 supermarket
Bounce
Bounce Plant Protein Maple Pecan Cashew Ball
35 g
£35.71/kg
at 1 supermarket
Bounce
Bounce Filled Peanut Protein Ball
35 g
£35.71/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
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
Tribe
Tribe Banoffee Choc Chip Protein Flapjack Sports Bar
Price per unit unknown
at 1 supermarket