10 Best Protein Bars Low Calorie No Sugar in The UK

Last updated on 08/09/2025

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9.7

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Grenade

Grenade High Protein, Low Sugar Bar - Dark Chocolate Mint, 12 x 60 g

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Why We Love It

Packed with over 22g protein.
Low sugar, only 0.4g/bar.
Perfect post-workout or anytime snack.

Main Highlights

HIGH PROTEIN: Packed with protein, with over 22 g per bar
LOW SUGAR: Low in sugar, with just 0.4 g per bar
GUILT FREE TREAT: Each triple-layered bar consists of a chocolate protein nougat, a layer of fresh mint caramel, coated in dark chocolate and topped with crispy pieces
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

The Protein Kitchen 100% Natural Protein Bars (12 x 55g) - No Added Sugar, Nutritional Protein Bars - Peanuts & Cocoa - Egg Whites from Free Range Chickens, Low Calorie Protein Bars, Snack Bars

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Why We Love It

Delicious roasted peanuts and cocoa.
All natural with simple ingredients.
High protein for on-the-go energy.

Main Highlights

✔️ DELICIOUS COMBINATION – Enjoy the rich blend of roasted peanuts and dark cocoa, perfectly balanced with a touch of sea salt for a satisfying snack.
✔️ ALL NATURAL – Made from simple, natural ingredients: dates, roasted peanuts, egg whites, cocoa mass, and sea salt – no artificial colors or sweeteners.
✔️ HIGH IN PROTEIN – Powered by egg whites and peanuts, providing a healthy protein boost on the go.
✔️ TEXTURE YOU'LL LOVE – Big peanut chunks give this bar a crunchy, satisfying bite.
✔️ PERFECT ANYTIME – Ideal as a post-workout snack or mid-day energy boost.

Fitnesshock Protein Bars No Added Sugar, Low Carb, High Fiber Snack – Palm Oil Free, Rich in Flavor | Coconut | 12x50g

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Why We Love It

Minimal impact on blood sugar.
Healthy, low-calorie chocolate treat.
Rich in filling fiber.

Main Highlights

VERY LOW CARB - only 3.5g per bar and almost Sugar-Free (1g) - has minimal impact on blood sugar levels
ONLY 1G OF SUGAR - A treat without extra calories and harm to your figure. A much more conscious alternative to a conventional chocolate bar
RICH IN FIBER 19.5g - 65% of the daily requirement - very filling, can serve as a meal replacement
Сhocolate protein bar with exotic flavor and real coconut flakes. The omission of refined sugar and flour makes the bars a healthy snack
PALM OIL-FREE, almost no saturated fat, gluten-free, non-GMO. No artificial flavors or preservatives

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

DELICIOUS PROTEIN BARS WITH CRUNCH & CHOCOLATE: Smooth chocolate coating meets an extra crunchy layer. Perfect as a snack in between – whether for sports, work or leisure
TOP NUTRITION – 20G PROTEIN PER BAR: Each 40 g bar provides 20 g of high-quality protein (50% protein content) with max. 0.8 g sugar. Make every day your day with plenty of exercise and a balanced, healthy diet
FEWER CARBS – MORE INDULGENCE: Compared to conventional chocolate bars, these bars contain around 30% fewer carbohydrates
PALM OIL FREE – MINDFUL SNACKING: Free from palm oil yet full of flavour. For everyone who cares about sustainability and quality
VARIETY IN A PRACTICAL 20-PACK MIX BOX: Discover several delicious flavours in one multi-flavour box with 20 protein bars. Ideal for trying, sharing or as a versatile stock for every day

Snickers - High Protein Bars | Low Sugar, Only 2g of Sugar per bar, Hazelnut and Milk Chocolate Flavour, 12 x 57g Box, 20g Protein

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Why We Love It

Iconic taste with protein boost.
Indulgent layers in each bar.
Perfect for on-the-go.

Main Highlights

Protein power: Craving Snickers? Now you can get the iconic taste you love with a protein boost! Our Snickers hazelnut and milk chocolate low sugar protein bars deliver 20g of protein, with only 2g sugar per bar.
Layers of indulgence: Each bar is packed with delicious hazelnut, crunchy peanuts, chewy caramel and coated in smooth milk chocolate.
Fuel your day: With only 221 calories per bar, they're perfect for a protein-powered energy snack between meals, a post-workout pick-me-up, or anytime you need an epic treat boost.
Conveniently sized: One box contains 12 bars, individually wrapped for on-the-go enjoyment. Now that’s satisfying!
Good to know: Not suitable for vegetarians. Product contains milk, soya, hazelnut and peanuts. May contain other nuts, egg and gluten.

GOOD GOOD Krunchy Keto Bar Salty Caramel - Low Carb Protein Bar - No Added Sugar Snack Bar - High Fibre - Suitable for Diabetics & Sugar Intolerant Individuals (15x35g)

Why We Love It

Low calorie, high protein bars.
Ideal for Keto-friendly lifestyles.
No sugar, perfect on-the-go.

Main Highlights

LOW CALORIE & HIGH PROTEIN BARS - Each bar is only 150 calories yet provides an incredible 4g of healthy fat and 3g of protein. The GOOD GOOD Krunchy Keto bars are a tasty and delicious snack that satisfy your sugar cravings without any of the junk.
KETO FRIENDLY SNACK - With only 2g of net carbs per serving, these tasty treats are great for anyone following a keto diet or lifestyle. Simply pop one in your lunch box or gym bag and enjoy a little pick me up whenever you need.
NO ADDED SUGAR - Here at GOOD GOOD we believe that life should be sweet but without any added sugar which is why you won't find any added sugar in our Krunchy Keto bars. We also don't use any artificial sweeteners which is why our products taste so good! Suitable for diabetics and those who are intolerant to sugar.
GREAT FOR ON THE GO - These convenient, 35g bars are great for taking with you as a snack at school or work. They're also great as a post-work out pick me up so make sure to take one with you to your next workout session!
COMES FROM THE LEADING NAME - GOOD GOOD is an Icelandic low carb and keto-friendly brand, a trusted name in UK and USA, offering wide selection of products ranging from spreads, syrups and natural sweeteners including stevia and erythritol.

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

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Why We Love It

High protein, low sugar snack.
Packed with 9 essential vitamins.
Decadent, delicious, and nutritious.

Main Highlights

HIGH PROTEIN and LOW SUGAR BARS: Each 55g bar contains 20g of protein, less than 3 grams of sugar and only 205 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 Peanut and Caramel Flavour features decadent milk chocolate that encases a layer of caramel mixed with crunchy crispies surrounding a rich, peanut centre
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

Barebells Protein Bars – Healthy Snacks, Protein Snacks for Breakfast, Sugar Free Chocolate, Low Carb – 12 x 55g (Hazelnut & Nougat)

Why We Love It

Satisfies chocolate cravings healthily.
Protein-packed and low sugar.
Palm oil-free indulgence.

Main Highlights

HAZELNUT NOUGAT - Silky milk chocolate, a gooey nougat center, and a crown of hazelnut pieces combine for a harmonious treat. Keep calm and savor Barebells!
HIGH IN PROTEIN - Protein bars from Barebells contain 20g of protein and just a few grams of sugar per serving which makes it the perfect low calorie snack.
PROTEIN SNACKS ON THE GO - Barebells is the ultimate choice for pre- and post-workout, as high protein snack at the office or for anyone who wants to satisfy their chocolate cravings.
WE BELIEVE IN HAPPY EATING AND HEALTHY LIVING - the Barebells protein bar is famous for its soft texture and amazing taste. Never compromising on flavor, Barebells protein bars are here to wow your taste buds.
PALM OIL-FREE AND NO ADDED SUGAR - Enjoy the reassurance that all our bars are crafted without palm oil and made without any added sugars

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

15% OffFree Shipping

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.

Fit bakes 64 Calories Belgian Chocolate Mini Bars (12x19g) Diabetic Chocolate Keto Snack, 1 Net Carb Low Sugar Crunch Cake, Diabetic Sweets Biscuits, Low Calorie Snack, No Added Sugar, Fitbakes

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Why We Love It

Low sugar, low calorie snack.
Perfect for Keto, Atkins diet.
Award-winning, gut-healthy treat.

Main Highlights

Low Sugar Healthy Snacks : Each of our mini skinny crunch bars has just 64 calories. Low sugar snacks, less than 1g sugar per bar. Small but mighty, tasty, crunchy, mini skinny low calorie bars wrapped in low sugar chocolate.
Keto Bars & Atkins Bars : Keto diet, & Atkins diet friendly. Our low sugar bars are the perfect for the Atkins diet. Guilt free keto chocolate low carb snacks : Keto food with less than 1 net carb.
Diabetic Chocolates : Ideal diabetic gift, our diabetes chocolates are great for a diabetic hamper. Try a new diabetic food with our crispy choc diabetic snacks, perfect diabetic biscuits & treats.
Weight Watchers Snacks : WW Wellness Wins Program official partner. Fibre snacks for gut health : 5g fibre per bar. No artificial ingredients.
Award Winning Healthy Snacks : Nourish Awards 2021 Winners. Try all our tasty flavours : Salted Caramel, Hazelnut, Dark Chocolate Orange, Cookies and Cream.

8.7

Excellent

We scanned 1853 products

We reviewed these offers relevant to the Protein Bars Low Calorie No Sugar 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 Grenade, The Protein Kitchen, FitnesSHOCK, Premier Protein, Snickers, GOOD GOOD, Fulfil, BAREBELLS, fit bakes, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Protein Bars Low Calorie No Sugar in the market, we considered we took a deep dive into 9266 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 Grenade High Protein, Low Sugar Bar - Dark Chocolate Mint, 12 x 60 g. We love many things about this product by Grenade. What sets it apart from the competition is Packed with over 22g protein, Low sugar, only 0.4g/bar, Perfect post-workout or anytime snack.
The best value product for most shoppers and where user satisfaction is continuously the highest is The Protein Kitchen 100% Natural Protein Bars (12 x 55g) - No Added Sugar, Nutritional Protein Bars - Peanuts & Cocoa - Egg Whites from Free Range Chickens, Low Calorie Protein Bars, Snack Bars by The Protein Kitchen based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Protein Bars Low Calorie No Sugar and the best cost-to-value ratio is FitnesSHOCK High Protein Bar Mix Box, 12g Protein, Low Carb, No Added Sugar, 5g collagen, Fiber-Rich, Low Calorie 140 Kcal, 12x40gat FitnesSHOCK with a 15% discount.
Our list of the best Protein Bars Low Calorie No Sugar 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 Protein Bars Low Calorie No Sugar in The UK

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We scanned 1853 products

We concluded that: