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Cheapest Protein Bars in the UK

Prices updated 13 October 2026 · 330 products across 7 supermarkets

The best-value protein bars in the UK right now is Grenade Protein Bars Oreo Bars 4 x 60g at Asda — £2.48/each (£9.90).
330Products Compared
7Supermarkets
£2.48Lowest /Each

We compare protein bars across all 7 major UK supermarkets — Tesco, Sainsbury's, Asda, Morrisons, Waitrose, Aldi and M&S — and rank by price per unit so you can see where protein bars is genuinely cheapest. Prices update daily.

1Grenade Protein Bars Oreo Bars 4 x 60gGrenade Protein Bars Oreo Bars 4 x 60gAsdaBest value£2.48/each£9.902Fulfil White Chocolate Peanut & Caramel Flavour Vitamin & Protein Bar 55gFulfil White Chocolate Peanut & Caramel Flavour Vitamin & Protein Bar 55gMorrisons£2.90/each£2.903GOLDEN BRIDGE Caramelised Biscuit Protein Filled Breakfast Bars 200 gGOLDEN BRIDGE Caramelised Biscuit Protein Filled Breakfast Bars 200 gAldi£7.45/kg£1.494GOLDEN BRIDGE Cookies & Cream Protein Filled Breakfast Bars 200 gGOLDEN BRIDGE Cookies & Cream Protein Filled Breakfast Bars 200 gAldi£7.45/kg£1.495FUEL10K High Protein Vegetable Instant Soup Sachets x3 65g 3 x 65gFUEL10K High Protein Vegetable Instant Soup Sachets x3 65g 3 x 65gMorrisons£8.21/kg£1.606Muscle Moose Big Protein Flapjack Golden Syrup 100gMuscle Moose Big Protein Flapjack Golden Syrup 100gSainsbury's£10.00/kg£1.007Muscle Moose Big Protein Flapjack Mixed Berry 100gMuscle Moose Big Protein Flapjack Mixed Berry 100gSainsbury's£10.00/kg£1.008GOLDEN BRIDGE Chocolate Protein Peanut Bars 0.16 KGGOLDEN BRIDGE Chocolate Protein Peanut Bars 0.16 KGAldi£12.44/kg£1.999GOLDEN BRIDGE Chocolate Protein Peanut Bars 160 gGOLDEN BRIDGE Chocolate Protein Peanut Bars 160 gAldi£12.44/kg£1.9910Nakd nakd. Protein Peanut Butter Fruit & Nut Bars 3 x 45gNakd nakd. Protein Peanut Butter Fruit & Nut Bars 3 x 45gAsda£14.81/kg£2.0011Nakd nakd. Protein Bars Cocoa Hazelnut 3 x45gNakd nakd. Protein Bars Cocoa Hazelnut 3 x45gAsda£14.81/kg£2.0012Nature Valley Protein Peanut and Chocolate 8x 40gNature Valley Protein Peanut and Chocolate 8x 40gTesco£14.84/kg£4.7513Nature Valley Protein Big Pack Peanut Chocolate Cereal BarsNature Valley Protein Big Pack Peanut Chocolate Cereal BarsWaitrose£14.85/kg£4.7514Nature Valley Protein Salted Caramel Nut Cereal Bars 4 x 40gNature Valley Protein Salted Caramel Nut Cereal Bars 4 x 40gAsda£15.63/kg£2.5015Nature Valley Protein Peanut & Chocolate Cereal Bars 4 x 40g (160g)Nature Valley Protein Peanut & Chocolate Cereal Bars 4 x 40g (160g)Asda£15.63/kg£2.5016Skinny Brands Protein Peanut Butter Bars 5 x 21gSkinny Brands Protein Peanut Butter Bars 5 x 21gAsda£16.38/kg£1.7217Eat Natural Protein Peanuts Almonds & Salted Caramel Multipack 3 BarsEat Natural Protein Peanuts Almonds & Salted Caramel Multipack 3 BarsWaitrose£16.67/kg£2.0018Eat Natural Protein Packed Peanuts & Chocolate Multipack 3 BarsEat Natural Protein Packed Peanuts & Chocolate Multipack 3 BarsWaitrose£16.67/kg£2.0019nakd. Protein Cocoa Hazelnut Multipacknakd. Protein Cocoa Hazelnut MultipackWaitrose£16.67/kg£2.2520nakd. Protein Peanut Butter Multipacknakd. Protein Peanut Butter MultipackWaitrose£16.67/kg£2.2521Nakd Protein Cherry BarsNakd Protein Cherry BarsWaitrose£16.67/kg£2.2522Warrior Raw Cookies & Cream Protein Flap Jack 75gWarrior Raw Cookies & Cream Protein Flap Jack 75gAsda£16.67/kg£1.2523Warrior Raw Honey Berry Protein Flap Jack 75gWarrior Raw Honey Berry Protein Flap Jack 75gAsda£16.67/kg£1.2524Warrior Raw Protein Flapjack Chocolate Peanut Butter 75gWarrior Raw Protein Flapjack Chocolate Peanut Butter 75gAsda£16.67/kg£1.25
See The Live Protein Bars Comparison →

Cheapest Protein Bars: FAQ

Where is the cheapest protein bars in the UK?

Right now the best value protein bars is Grenade Protein Bars Oreo Bars 4 x 60g at Asda, £9.90 (£2.48/each). SmartShelf ranks protein bars by price per unit across 7 supermarkets, updated daily.

Which supermarket is cheapest for protein bars?

We compare protein bars across Tesco, Sainsbury's, Asda, Morrisons, Waitrose, Aldi and M&S. Today Asda has the cheapest option, but the ranking updates every day as prices change.

How does SmartShelf compare protein bars prices?

We list each product's price per unit (£/kg, £/litre or per item) so you compare like for like, and we show loyalty prices such as Clubcard and Nectar where available — free, with no sign-up.