10 Best Low Calorie Protein Breakfast Bars in The UK

Last updated on 24/07/2025

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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

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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

Barebells Protein Bars – Healthy Snacks, Protein Snacks for Breakfast, Sugar Free Chocolate, Low Carb – 12 x 55g (White Salty Peanut)

Why We Love It

Indulgent yet health-conscious snack.
Delicious workout fuel.
Promotes guilt-free chocolate cravings.

Main Highlights

WHITE SALTY PEANUT - Gilded salty peanuts bathed in heavenly caramel, embraced by a white protein fluff, and cloaked in a creamy white chocolate embrace. A taste of paradise!
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

Grenade High Protein, Low Sugar Bar - White Chocolate Cookie, 12 x 60 g (Packaging May Vary)

26% Off

Why We Love It

Packed with protein goodness.
Sugar levels kept low.
Indulgent, yet healthy snack.

Main Highlights

HIGH PROTEIN: Packed with protein, with over 22 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 white caramel and coated in white chocolate and cookie 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

Keto Keto Bars 12 x 50g Keto Snacks Weight Loss | Keto Diet, Sugar Free Snack, Meal Replacement Bar | Healthy Snacks, Low Carb Food | Low Calorie, Vegan Food, Breakfast Bar (Coconut Cashew)

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Why We Love It

Tasty, healthy ketogenic snack.
100% Ketogenically approved vegan bars.
No sugar spike ensured.

Main Highlights

Delicious Vegan Treats - After 3 years of development, Keto Keto have created the ultimate tasty, healthy snack for those on a fat loss, pure keto or atkins diet.
Truly Keto Bar - All of our vegan products have achieved 100% Ketogenic scores, verified by Ketone Meter Testing - Throw the keto cookbook out, we have done the hard work for you. We have multiple flavours which include sugar free chocolate making our bars the ultimate keto snack.
No Sugar Spike - Unlike most protein bars, Keto Keto bars are pure and contain no ingredients which spike blood sugar, making them truly ketogenic and a great diabetic food. They are also both dairy free and vegan friendly.
Two Delicious Flavours - Truly tasty keto food is hard to come by. That's why all of our keto snacks and treats are made with taste as a priority. Simply put, our customers LOVE our bars, and we are certain that you will too.
Sugar Free Energy Bar - Energy Bars typically provide lots of carbohydrates. Whether you are on an atkins diet or a keto diet, our bars priovide you with the good fats you need to maintain your goals. Ditch the keto diet pills and grab our tasty bars!

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

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Why We Love It

Convenient, tasty, high-protein snack.
Guilt-free chocolate indulgence.
Aids weight loss seamlessly.

Main Highlights

HIGH-PROTEIN BAR: Delicious protein bars with a high protein content. Each 64g bar contains 21g of protein – nearly 30%. The perfect on-the-go protein snack, ideal for a boost during sports activities
LOW-SUGAR INDULGENCE: Each bar contains 1.2 of sugar, making PhD Nutrition Smart Protein Bars suitable for a low-sugar diet or nutrition plan. Completely free from palm oil
PERFECT TEXTURE: A super-soft protein core coated in delicious caramel and protein crispies creates a crunchy yet tender treat for any occasion. A high-protein bar packed with full flavor despite low sugar content
SUITABLE FOR MACRO-FRIENDLY NUTRITION: These protein bars are ideal for supporting a macro-friendly, high-protein diet as part of a balanced nutrition plan
OPTIMIZED SPORTS NUTRITION: PhD collaborates closely with research institutes and sports scientists to tailor the ingredients of all products to specific training purposes

The Gut Stuff – High Fibre Fruit & Nut Bars – Mixed Flavours – 12 x 35g Bar Box – Gut Friendly Snack, Gluten Free, Vegan, Low Calorie, All Natural

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Why We Love It

High fibre, gut-friendly snack.
Various delicious flavours included.
Convenient for on-the-go lifestyles.

Main Highlights

GUT-FRIENDLY FIBRE BARS: The Gut Stuff's High Fibre Fruit & Nut Bars are the perfect snack for those looking to up their fibre intake. Each bar is carefully formulated with a blend of high-quality ingredients that are packed with fibre, making them a gut-friendly option. With 10g of fibre per bar, these bars provide 30% of your recommended daily intake.
MIXED FLAVOURS: Enjoy a variety of delicious flavours with The Gut Stuff's High Fibre Fruit & Nut Bars. This mixed box contains a selection of mouth-watering fruit and nut flavour; including 3 x Sea Salt & Caramel, 3 x Peanut Butter, 2 x Cocoa & Hazelnut, 2 x Apple & Cinnamon and 2 x Raspberry & Coconut. These bars are made using natural, plant-based ingredients that are gluten-free, vegan, and free from artificial additives.
HEALTHY SNACK ON-THE-GO: With 30% of your recommended daily intake, these bars are the perfect healthy snack to take with you on-the-go. They are individually wrapped and easy to grab, making them ideal for busy lifestyles. Whether you're at work, on a hike, or just need a quick snack, these bars are a convenient and tasty option.
GLUTEN-FREE & VEGAN: The Gut Stuff believes that everyone should be able to enjoy delicious, healthy snacks, regardless of their dietary requirements. That's why our High Fibre Fruit & Nut Bars are gluten-free and vegan-friendly. We use only the highest quality, natural ingredients to create our bars, so you can enjoy them with confidence.
QUANTITY AND CONVENIENCE: Each box of The Gut Stuff's High Fibre Fruit & Nut Bars contains 12 individually wrapped bars, making them a convenient and cost-effective option for those looking to up their fibre intake. Whether you're looking for a healthy snack for yourself or want to stock up, these bars are a great choice. Order yours today and enjoy the delicious taste while getting your fibre fix with The Gut Stuff's High Fibre Fruit & Nut Bars!
THE GUT STUFF: Our experts have created high fibre fruit and nut bars that taste delicious and benefit your gut health at the same time. But you don't have to take our word for it, our bars have won awards such as the Gut & Glory Award. The Times ranked our bars the second in the “the best cereal bars for lunch boxes”, with a rating of 4.75/5 stars. Shop our brand store today and experience the yummy goodness!

Perkier Variety Box,18 bars, 6 Flavours, Vegan, Gluten Free, Protein, High Fibre, Lower Sugar Snack, Natural Ingredients, Lower Calorie, Healthy, No Palm Oil, Nut Bar, Carbon Neutral

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Why We Love It

All natural vegan snack bars.
High protein, high fibre content.
Sustainable and ethically produced.

Main Highlights

6 DELICIOUS FLAVOURS – 18 Multipack of 3 x Salted Caramel Dark Chocolate, 3 x Peanut, 3 x Madagascan Vanilla Dark Chocolate, 3 x Cocoa & Cashew, 3 x Peanut Dark Chocolate & 3 x Cranberry
ALL NATURAL INGREDIENTS - Tasty vegan bars with no artificial preservatives, sweeteners, colours, flavours and lower sugar
PROTEIN & HIGH FIBRE SNACK - Healthy breakfast bars make a great alternative to biscuits and chocolate. Suitable for on-the-go, post-workout, lunchboxes or guilt-free morning or afternoon snacks
GLUTEN FREE AND VEGAN - All our bars are vegan, vegetarian, gluten free and low calorie
SUPPORTS GUT HEALTH - Every bar contains at least 25% of your daily recommended fibre
CHEWY FRUIT AND NUT BAR – These low calorie crunchy and chewy cereal bars with slow-release energy, are a great healthy snack for adults and kids
SUSTAINABLE & ETHICAL – Plant based, carbon neutral, no palm oil, B-Corp and recyclable packaging. Perkier is a “Buy Women Built” company

Bodybuilding Warehouse

Premium LUX Protein Flapjack Bars - High Protein, Low Sugar Snack – Bodybuilding Warehouse - Blueberry Yogurt (24 x 75g)

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Why We Love It

High protein for lasting energy.
Low sugar and high fibre.
Delicious flavours to choose from.

Main Highlights

LUX PROTEIN FLAPJACK - These snack bars contain 20g of protein, very low sugar and high fibre. Protein keeps you full for longer, boosts energy and mood and is helpful for muscle building and repair. Perfect at any time of the day. Great for when you're on the go.
BENEFITS - Great choice for a snack or dessert. Ideally Incorporating complex carbohydrates in combination with protein into your post-workout routine can assist with muscle growth and recovery.
OAT-BASED BARS - A great source of complex carbohydrates. They provide slow-release and sustainable energy. This is great if you’re trying to control your calorie intake.
FLAVOURS - Available in 5 delicious flavours and 2 sizes (12 & 24 packs): Birthday Cake, Blueberry Yogurt, Chocolate Chunk, Mint Chocolate Chunk & Chocolate Orange. Suitable for vegetarians.
SERVING SIZE - 1 Bar (75g) - That’s 20g of protein per bar!

Misfits Vegan Protein Bars, Sweet & Chewy Toffee | Low Sugar & Carb, High Fibre Snacks | Pack of 15

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Why We Love It

Healthy chocolate indulgence.
Packed with plant-based protein.
Low in sugar and calories.

Main Highlights

HEALTHIER CHOCOLATE SNACK: This sweet irresistible bar has a soft chewy toffee flavour centre; it's coated with smooth vegan chocolate & crispy rice pieces, for a satisfying crunch; ideal on-the-go or office snacks
12 G PROTEIN PER BAR: Our plant-based bars pack 12 g of vegan protein per bar; we use a blend of pea & soy protein for a deliciously soft texture & taste
LOW SUGAR BARS: These vegan snacks pack 6 g of fibre per bar & are low in sugar, with less than 1 g per bar; a low carb bar with just 152 calories, for post-gym fuel or breakfast without the sugar crash
GUILT-FREE INDULGENCE: Our satisfying treats are an ideal chocolate snack with all the nutritional benefits of a protein bar & zero compromise on taste; great for chocolate lovers who want to cut back on dairy & sugar
SOFT & INDULGENT: These moreish chewy bars are made with our signature soft & fudgy texture, with a contrasting crunch for a delicious snacking experience

SlimFast Snack Bar, Low-Calorie Healthy Snacks For Adults, Chocolate & Protein Bars Alternative, Part of Balanced Diet, Weight Loss and Management Plan, Double Choc Flavour, Multipack, 30 x 26 g

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Why We Love It

Tasty, low-calorie indulgence.
Convenient for on-the-go snacking.
Variety of delicious flavors available.

Main Highlights

99 Calories
Made with real milk & dark chocolate
High in protein, fibre and with 23 vitamins and minerals, they make the perfect low-calorie meal on the go
No artificial colours, flavours or preservatives
Tuck in and enjoy

8.7

Excellent

We scanned 1690 products

We reviewed these offers relevant to the Low Calorie Protein Breakfast 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, BAREBELLS, Grenade, Keto Keto, PhD, The Gut Stuff, Perkier, Bodybuilding Warehouse, Misfits, SlimFast, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Low Calorie Protein Breakfast 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 Barebells Protein Bars – Healthy Snacks, Protein Snacks for Breakfast, Sugar Free Chocolate, Low Carb – 12 x 55g (White Salty Peanut) by BAREBELLS based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Low Calorie Protein Breakfast Bars and the best cost-to-value ratio is Grenade High Protein, Low Sugar Bar - White Chocolate Cookie, 12 x 60 g (Packaging May Vary)at Grenade with a 26% discount.
Our list of the best Low Calorie Protein Breakfast 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 Low Calorie Protein Breakfast Bars in The UK

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We scanned 1690 products

We concluded that: