10 Best High Protein Low Calorie Bars in The UK

Last updated on 16/07/2025

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FULFIL Vitamin and Protein Bars (15 x 55 g Bars) — Chocolate Salted Caramel Flavour — 20 g High Protein, 9 Vitamins, Low Sugar

Why We Love It

High protein, low sugar snack.
Packed with 9 essential vitamins.
Indulgent yet nutritious flavor.

Main Highlights

HIGH PROTEIN and LOW SUGAR BARS: Each 55g bar contains 20g of protein, less than 3 grams of sugar and only 204 calories. Great for a tasty treat or a post workout refuel
9 VITAMINS: Each FULFIL bar contains 30 percent RDA for 9 essential vitamins to support you through everyday life
DELICIOUS and NUTRITIOUS: FULFIL bars are not your average protein bar. Our Chocolate Salted Caramel Flavour contains an indulgent milk chocolate coating surrounding a soft, silky salted caramel centre topped with a layer of crispy pieces
OUR PACKS CONTAIN 15 BARS: So you never run out of your favourite protein bar.
LIFE'S WONDERFUEL: We want FULFIL bars to fuel you on all of your everyday adventures, whether it’s to get you through your work day, hiking up a mountain, a workout, or a sofa snack we’ve got you covered

Premier Protein - High Protein Bar 50% - Multiflavourbox - 20x40g - Low Sugar - Low Carb - High Protein Bar

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Why We Love It

High protein content: 50%.
Amazing taste and texture.
Without palm oil.

Main Highlights

High protein content: 50% protein
Max. 0,8 g sugar per bar
Reduced in carbs: 30% less carbohydrates than traditional chocolate bars
Amazing taste and great fluffy texture; Crispy Cookie and Crispy Peach: with crunchy crisp pieces
Without palm oil

Grenade High Protein, Low Sugar Bar - Caramel Chaos, 12 x 60 g (Packaging May Vary)

19% Off

Why We Love It

Packed with 21g protein.
Sugar content only 1.5g.
Certified by Informed Sport Programme.

Main Highlights

HIGH PROTEIN: Packed with protein, with 21 g per bar
LOW SUGAR: Low in sugar, with just 1.5 g per bar
GUILT FREE TREAT: Each triple-layered bar consists of protein nougat, topped with caramel and coated in milk chocolate and crispies
INDULGENT ON THE GO SNACK: This indulgent low sugar snack is perfect for enjoying at any time of the day as a delicious snack or a post workout treat
INFORMED SPORT CERTIFIED: Certified with the Informed Sport Programme and therefore suitable for use by drug tested athletes and military personnel
INGREDIENT CHANGE: Packaging and ingredients may vary

FitnesSHOCK Protein Bar 12pcs no added sugar, 20% protein, low carb (3,5g), rich in fibre, low calorie, 12-pack fitness chocolate bars mix box, palm oil free 12x50g

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Why We Love It

Delightful variety pack flavors.
Exceptionally low sugar content.
Rich in fiber, protein.

Main Highlights

FitnesSHOCK variety pack offers you 12 bars in 3 EXQUISITE FLAVORS: Coconut, Hazelnut-Caramel and Peanut-Salted Caramel. You will surely find your favorite taste!
ONLY 1G OF SUGAR - A treat without extra calories and harm to your figure. A much more conscious alternative to a conventional chocolate bar
LOW CARB <5g per bar - perfect nutritional balance: delicious aid for carbohydrate control
RICH IN FIBER and PROTEIN - makes you feel full quickly - A practical and healthy snack
PALM OIL-FREE, almost no saturated fat, gluten-free, non-GMO. No artificial flavors or preservatives

FitnesSHOCK High Protein Bar Mix Box, 12g Protein, Low Carb, No Added Sugar, 5g collagen, Fiber-Rich, Low Calorie 140 Kcal, 12x40g

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Why We Love It

Four unique, delicious flavours.
High-protein, low-carb snack.
No added sugars, guilt-free.

Main Highlights

ALL IN ONE! FOUR unique flavours in one box: Blueberry Yoghurt, Bumble Coffee, Apple Pie-Cinnamon and Lemon Chia Pannacotta. You'll definitely find your favourite flavour! Our mixed box is a delicious way to cover your protein demand without compromising your diet.
HIGH PROTEIN CONTENT: 12g per bar, making it the perfect high-protein snack for pre or post-workout, ideal for athletes. 5G COLLAGEN - extra help for your skin, hair, joints and nails
OUTSTANDING NUTRITIONAL VALUE: Only about 3.5g of carbohydrates - truly low carb, rich in fiber with over 14g, meeting nearly half of your daily needs. Incredibly filling. A great snack for any time, providing the necessary energy throughout the day without overburdening.
EXTREMELY LOW IN CALORIES: With only app. 140 kcal per protein bar, it fits perfectly into any diet and appeals to those mindful of their calorie intake.
NO ADDED SUGAR: Our protein bars are free from added sugars, making them the perfect choice for anyone looking to maintain a low-sugar diet. A much more conscious replacement for a traditional chocolate bar.

FitnesSHOCK High Protein Bars - High 20G Protein Content Protein Bar With No Added Sugar, Low Calorie Low Carb High Fibre 12Pcs 60G

10% OffFree Shipping

Why We Love It

Delicious, nutty pistachio flavor.
High in protein for energy.
Perfect for on-the-go snacking.

Main Highlights

UNIQUE TASTE: Enjoy the full, nutty taste of pistachios in every bite. Offering an intense, natural pistachio flavor, this protein bar is the perfect choice for anyone looking for a powerful, flavorful snack that's both delicious and nutrient-dense.
RICH IN PROTEIN: Each bar provides a robust 20 grams of protein, supporting muscle recovery and growth. Whether you're an athlete or lead an active lifestyle, this protein-packed snack keeps you fueled throughout the day.
TOP NUTRITIONAL VALUE: Low in carbs with only 4 grams and 5 grams of fat, this bar offers a guilt-free indulgence. It's palm oil-free and non-GMO, making it a nutritious and satisfying option for your daily snacking needs.
NO ADDED SUGAR: Enjoy dessert every day without the guilt! Our bars contain no added sugar or flour, making them ideal for those following a low-sugar diet. Satisfy your sweet tooth while sticking to your healthy eating goals.
EAT ON-THE-GO: Non-glazed and easy to carry, this bar is perfect for life on the move. Slip it into your bag for a quick, crumb-free snack wherever you are—whether you're at the gym, at work, or on a hike.

Mars - Salted Caramel Low Sugar Chocolate Hi Protein Bars | 12 x 57g Pack, Only 2g of Sugar per bar, High Protein Energy Snack, 18g Protein

22% OffFree Shipping

Why We Love It

Delicious Mars chocolate flavor.
Low sugar, high protein.
Perfect post workout snack.

Main Highlights

Introducing our new Mars Salted Caramel low sugar protein bar which combines the unmistakable delicious taste of Mars chocolate with a soft layer of salted caramel.
This sweet and salty addition to our low sugar range contains 18g of protein per bar and just 2g sugar.
Only 196 calories per bar - Not suitable for vegetarians.
Perfect to carry you between meals, or as a great post workout snack boost.
One box contains 12 individually wrapped bars.

Optimum Nutrition Whipped Protein Bars, Low Calorie Snacks, Low Carb Low Sugar, Workout Snack for Men and Women, Chocolate Caramel Flavour, 10 x 60g

20% OffFree Shipping

Why We Love It

High protein, great taste.
Contains naturally occurring sugars.
Boosts workout, 100% vegetarian.

Main Highlights

ON Whipped Protein Bars offer the perfect balance between high protein and great taste
ON energy bars are protein snacks packed with 20 g of protein
Free from palm oil, low sugar protein bars: 100% vegetarian ingredients contain only naturally occurring sugars
High in fibre, healthy protein snacks to be enjoyed on the go, as a post-workout and pre-workout snack for men and women
* Source: COMMISSION REGULATION (EU) No 432/2012 of 16 May 2012

Warrior Raw Protein Bars – 12 x 75g Oat Bar Flapjacks – High Fibre, Low Sugar – Ideal Meal Replacement or Healthy Nutrition Energy Snacks – HFSS/GMP Certified – UK Made (Variety Box)

6% OffFree Shipping

Why We Love It

Packed with 20g protein.
Low sugar, high fibre.
Incredible taste satisfaction.

Main Highlights

HUGE 20 GRAMS OF PROTEIN PER BAR - That's more than 3 whole eggs Our bars are packed with high-quality milk protein to help muscles rebuild and recover after training and to help you meet your daily protein intake.
LOW IN SUGAR, HIGH IN FIBRE - With only 3.5g sugar per bar, these are some of the lowest sugar protein chewy granola bars ever released Also high in fibre to help control blood sugar levels.
USE PRE OR POST WORKOUT - Eat pre-workout for an energy boost or post-workout to help aid recovery. Ideal for cutting or bulking when counting your macros.
GREAT TASTE - Chewy granola oat bar that can be eaten as a filling snack to help keep you satisfied until your next meal and curb cravings for high-sugar snacks.
PACK OF 12 x PROTEIN BARS - Save money with this multipack of 12 high-protein bars. Store at home to eat as and when needed. Can be used as part of a healthy diet to help manage weight gain.

PhD Nutrition Smart Protein Bar Low Calorie, Nutritional Protein Bars/Protein Snacks, High Protein Low Sugar, Chocolate Peanut Butter Flavour, 20g of Protein, 64g Bar (12 Pack)

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Why We Love It

Perfect for on-the-go protein.
Guilt-free, tasty snacking option.
Aids in weight loss.

Main Highlights

Great tasting, triple layered bar
High Protein- 20g protein per bar
Only 1g of sugar per bar
Palm oil free
Convenient healthy on the go snack

8.7

Excellent

We scanned 1690 products

We reviewed these offers relevant to the High Protein Low Calorie Bars within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Fulfil, Premier Protein, Grenade, FitnesSHOCK, Mars, Optimum Nutrition, Warrior, PhD, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best High Protein Low Calorie Bars in the market, we considered we took a deep dive into 8451 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is FULFIL Vitamin and Protein Bars (15 x 55 g Bars) — Chocolate Salted Caramel Flavour — 20 g High Protein, 9 Vitamins, Low Sugar. We love many things about this product by Fulfil. What sets it apart from the competition is High protein, low sugar snack, Packed with 9 essential vitamins, Indulgent yet nutritious flavor.
The best value product for most shoppers and where user satisfaction is continuously the highest is Premier Protein - High Protein Bar 50% - Multiflavourbox - 20x40g - Low Sugar - Low Carb - High Protein Bar by Premier Protein based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for High Protein Low Calorie Bars and the best cost-to-value ratio is Mars - Salted Caramel Low Sugar Chocolate Hi Protein Bars | 12 x 57g Pack, Only 2g of Sugar per bar, High Protein Energy Snack, 18g Proteinat Mars with a 22% discount.
Our list of the best High Protein Low Calorie Bars is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best High Protein Low Calorie Bars in The UK

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We scanned 1690 products

We concluded that: