Prices and ratings below were checked on Amazon UK on 21 October 2026 and are refreshed regularly. Amazon prices change daily — the live price is always the one on Amazon. As an Amazon Associate we earn from qualifying purchases; it never changes the order of this table.
Protein bars compared on price per bar. 20g protein and under 250 calories is the usual target; the big differences are texture and sugar alcohols.
Protein Bars UK — all 18 products
Prices checked on Amazon UK: 21 October 2026. Prices change daily — the live price is shown on Amazon.
#1
Grenade Chocolate Chip Salted Caramel Protein Bars
60 g
£20.47 £28.43/kg price per bar
- HIGH PROTEIN, LOW SUGAR: Each bar is packed with over 20g of protein and contains just 1.4g of sugar
- NO COMPROMISE ON TASTE: Each triple-layered bar consists of a soft protein nougat, topped with a tasty salted…
- FUEL YOUR WORKOUT: Made with high-quality protein, supports muscle growth, recovery & helps you reach your fi…
#2
Nature Valley Protein Peanut & Chocolate Gluten Free Cereal Bars 26 x…
40g
£19.37 £18.63/kg price per bar
- Nature Valley Protein Cereal Bars contain 10g of protein and are high in fibre
- Nature Valley Protein Cereal Bars are the perfect on the go gluten free snack for any time of day
- Why not also try Nature Valley Crunchy Oats & Dark Chocolate Cereal Bars or Nature Valley Nut Butter Peanut B…
#3
FULFIL Vitamin and Protein Bars
55g
£26.58 £1.77 each price per bar
- HIGH PROTEIN AND LOW SUGAR SNACK BARS: Each 55g bar contains up to 20g of protein, less than 3 grams of sugar…
- 9 VITAMINS: Each FULFIL protein bar contains 30 percent RDA for 9 essential vitamins to support you through e…
- DELICIOUS TASTE: FULFIL bars are not your average protein bar. Our Chocolate Salted Caramel Flavour contains …
#4
Grenade OREO White Protein Bars
60 g
£19.44 £27.00/kg price per bar
- HIGH PROTEIN, LOW SUGAR: Each bar is packed with over 20g of protein and contains less than 2g of sugar
- NO COMPROMISE ON TASTE: Each triple-layered bar consists of genuine OREO Vanilla, a soft protein nougat loade…
- FUEL YOUR WORKOUT: Made with high-quality protein, supports muscle growth, recovery & helps you reach your fi…
#5
Trek High Protein Flapjack Cocoa Oat
50 g
£14.67 £18.34/kg price per bar
- PROTEIN flapjacks delivering long lasting energy to keep you going
- PLANT-BASED - each bar contains 9g of plant-based protein, is a source of fibre and vegan friendly
- SOURCE OF FIBRE - Perfect nourishing and filling healthy snack with oats
#6
Nakd Cocoa Hazelnut Protein Bar
45g
£18.54
- MADE WITH DELICIOUS NATURAL INGEDIENTS – a unique combination of fruit & nuts cold-pressed together without h…
- PLANT-BASED PROTEIN – made with 7g plant-based protein coming from delicious peanuts. nākd. protein bar are n…
- CLEAN, SIMPLE EATING – a snack bar containing 100% natural ingredients, no added sugar, is raw-cold pressed, …
#7
Yubi Bar
35g
£12.99 £30.93/kg price per bar
- PROOF IS IN THE TASTING – We have spent years developing a protein bar which tastes just like a chocolate bar…
- LOW SUGAR, 99 CALORIES - We take pride in offering products that are both low in sugar and low in calories, a…
- GLUTEN & DAIRY FREE - Crafted in a gluten and dairy free facility, YuBi Bars are made for everyone
#8
Warrior Crunch High Protein Bars 12 x 64g Crispy Chocolate Snack
64g
£24.00
- HIGH PROTEIN FOR MUSCLE SUPPORT & RECOVERY – Warrior Crunch protein bar delivers 20g of high-quality protein …
- LOW SUGAR FOR SMART, STEADY ENERGY – With just 2g sugar, these low sugar protein bars deliver sweet taste wit…
- LOW CARB CRAVING CONTROL & ON-THE-GO FUEL – Designed as a guilt-free alternative to sugary chocolate bars, Wa…
#9
PhD Nutrition Smart Protein Bar Low Calorie
21g
£24.91 £32.06/kg price per bar
- Nutritional Bars: These bars deliver 20g of high-quality plant protein and less than 1g of sugar per serving,…
- Weight Loss Aid: Ideal for pre-workout snacking or post-workout recovery, these bars are designed to provide …
#10
Bounty Protein Bar
52g
£16.99 £27.23/kg price per bar
- ✔ 18g High‑Quality Protein A delicious high‑protein bar delivering 18g of protein — ideal for post‑workout re…
- ✔ Classic Bounty Coconut & Milk Chocolate Flavour Enjoy the iconic tropical coconut centre coated in smooth m…
- ✔ Perfect for Gym, Work or On‑the‑Go Individually wrapped 52g bars make it easy to fuel up wherever you are —…
#11
Snickers Protein Bar
57g
£16.99 £24.84/kg price per bar
- ✔ 20g High‑Quality Protein A delicious high‑protein bar delivering 20g of protein — ideal for post‑workout re…
- ✔ Low Sugar with Only 2g per Bar Enjoy the iconic Snickers taste with significantly reduced sugar, helping yo…
- ✔ Real Milk Chocolate, Caramel & Nougat A rich, indulgent combination of smooth chocolate, soft nougat and ca…
#12
Optimum Nutrition Marshmallow Protein Bar
65 g
£19.39 £29.83/kg price per bar
- Experience the unique texture and great taste of Optimum Nutrition's protein bars to help support your nutrit…
- ON protein bars are versatile protein snacks packed with 20 g of protein, helping you daily to stay on top of…
- Sports nutrition protein bars with no added sugar* are great-tasting snack alternatives designed for active p…
#13
Snickers Hi‑Protein Bars
20g
£16.99 £24.84/kg price per bar
- 🍫 DARK CHOCOLATE SNICKERS TASTE Enjoy the iconic Snickers flavour with rich dark chocolate, caramel and pean…
- 💪 ONLY 1G SUGAR – LOW SUGAR, HIGH IMPACT A guilt‑free protein snack with just 1g of sugar per bar. Ideal for…
- 🏋️ PERFECT FOR GYM, WORK OR ON‑THE‑GO A convenient protein bar for pre‑workout, post‑workout, office snacking…
#14
Pip & Nut Protein Bars
46g
£13.75 £0.92 each price per bar
- No.1 ingredient peanuts.
- 10g of plant-based protein.
- Real ingredients for your real, non-stop, here-there-and-everywhere, life.
#15
Bulk Macro Munch Protein Bar
62g
£28.05 £2.34 each price per bar
- 20g High Protein Per Bar Fuels Active Lifestyles & Fitness Goals – Each Bulk Macro Munch bar contains a power…
- Low Sugar Snack Healthier Alternative to Chocolate Bars – With less than 3g of sugar per bar, this guilt-free…
- Soft-Baked Triple Layer Texture Indulgent, Satisfying & Convenient – Enjoy a chewy, soft-baked base with laye…
#16
Barebells Protein Bars
12 Count
£23.99 £36.35/kg price per bar
- Barebells protein bar
#17
Grenade Soft Core Double Chocolate Flavour Protein Bar
50 g
£22.00 £36.67/kg price per bar
- NEW DOUBLE CHOCOLATE FLAVOUR: Enjoy an irresistibly soft chocolate guilt-free protein bar, combining light & …
- HIGH PROTEIN, LOW SUGAR: Each bar is packed with over 14 g of protein and contains less than 2 g of sugar
- FUEL YOUR WORKOUT: Made with high-quality protein, supports muscle growth & helps you reach your fitness goal…
#18
Myprotein Layered Protein Bar Variety Box 12 x 60g 20g Protein Per Bar…
60g
£27.49
- FIVE FLAVOURS IN ONE BOX - Birthday Cake, Chocolate Sundae, Cookies & Cream, Lemon Meringue, and White Gold, …
- AROUND 20G PROTEIN PER BAR - Every flavour in the box delivers a strong protein hit, with exact values varyin…
- HIGH IN FIBRE - Around 8g of fibre per bar (based on the Birthday Cake flavour), supporting your everyday wel…
How to use this table
Ratings are the real Amazon UK owner ratings at the time of checking and the price per bar column is the fairest way to compare value across tub sizes. Click any product to see the live price, current offers and the full reviews on Amazon.
Last checked: October 2026.