10 Best Energy Bars in The UK

Last updated on 09/08/2025

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Science in Sport

SIS Go Energy Bar, High Carb, Fruit Infused Energy Bar, Chocolate Fudge Flavour (30 Packs)

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Why We Love It

Nutritious and easily digestible.
Practical for active lifestyles.
Assures substance safety.

Main Highlights

ENERGY BARS FOR CYCLING, HIKING & TRAINING: With 25g of carbohydrates, these carbohydrate bars are valuable energy sources on the go. Ideal for all types of training sessions—whether running, hiking, cycling, or working out
LOW IN FAT: The mini energy bar contains just 2.1g of fat. It is easy to digest and the perfect snack during a competition. The bar also has a moderate protein content of 4.7g
MADE WITH NATURAL FRUITS: The bar draws its carbohydrates from wholesome ingredients and the natural fruit sugar of real fruits. Full of flavor and delicious – a true treat and the perfect addition to any sports nutrition plan
CONVENIENT FITNESS BAR FOR ON THE GO: The mini energy bar is easy to carry, making it the perfect snack for any occasion—no matter where you are.
SIS SCIENCE IN SPORT: Science in Sport is a pioneer in sports nutrition. Since 1992, we have collaborated with research institutes, elite athletes, and sports scientists

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 (Honey Berry)

Why We Love It

Versatile workout protein snack.
Promotes substantial energy.
Aids recovery effectively.

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.

CLIF Bar Energy Bars/Nutritional Protein Bar, Source of Plant Based Protein, Crunchy Peanut Butter, 12 x 68g

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Why We Love It

Tasty protein-packed energy booster.
Unique crunchy, smooth blend.
Diverse delicious flavor options.

Main Highlights

The "Ultimate Energy Bar" made with a mix of plant-based ingredients, carbohydrates, protein, fat and vitamin B13
Made with wholesome ingredients like nuts, dried fruits, rolled oats and rainforest alliance certified cocoa
Offers a strong energy Boost wrapped in great Crunchy Peanut Butter flavour
Ideal for all sports (football, hiking, climbing, running) and outdoor activities
Available in different flavours

Energy Bars by Styrkr - Pack of 12 Rice Bars for Cycling & Running - Mixed Flavours Pack - Approved by Endurance Athletes - 50g of Carbs via Advanced Dual-Carb Formulation - BAR50-12x Pack

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Why We Love It

Satisfies with diverse flavour options.
Promises quick-release energy naturally.
Digests easily without gut issues.

Main Highlights

WORLD’S BEST, ATHLETE-APPROVED, ALL-IN-ONE ENERGY BAR: The BAR50 Mixed 12x Pack or Bars is an adventure-ready, quick-release energy bar that contains 50g+ of dual-source carbohydrates and 250+ calories per bar. It gives you the edge by delivering maximum energy and fighting flavour fatigue on longer expeditions.
MAXIMUM ENERGY BOOST, EVERY TIME: During intense exercise, carbohydrates are your body’s primary source of energy and more can be absorbed per hour when they come from multiple transportable sources: in this case maltodextrin and fructose (converted to glucose in the liver). Styrkr’s BAR50 incorporates this dual-carb system – and contains 50g+ of carbohydrates – to help you reach your finish line in the fastest time possible.
IDEAL FOR CYCLING, RUNNING AND HIKING: BAR50 is a nutritionally complete, high-energy snack developed by athletes that contains a perfectly balanced amount of carbs, proteins, fat and fibre. Revitalising and flavourful, the BAR50 will help boost energy, combat tiredness and fight flavour fatigue on longer adventures.
SOFT AND CHEWY, YET FAST AND LIGHT: BAR50 provides a soft, chewy texture that’s pleasing to eat, but dense enough to pack a powerful punch. It was created using puffed rice and all natural ingredients, so it’s also fast to digest and easy on the gut.
VEGAN AND GLUTEN-FREE: We are proud that all of our products – across the entire Styrkr range – are Vegan Society-approved and made with natural ingredients. You’ll not find any colourants or unnecessary preservatives in our products either. With Styrkr, it’s natural ingredients all the way.

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

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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

CLIF Bar ENERGY BAR Mixed Flavour Variety-Pack x 12 bars Nutritional Bar Source of Plant Based Protein 12 bars x 68g

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Why We Love It

Variety of flavors included.
Made with wholesome ingredients.
Source of protein and fiber.

Main Highlights

Multipack containing 12 Clif bars: 2 x Chocolate Chip, 2 x Crunchy Peanut Butter, 2 x Peanut Butter Banana, 2 x White Chocolate Macedamia, 2 x Blueberry Almond Crisp, 2 x Chocolate Almond Fudge
CLIF Bar is the original energy bar made with wholesome ingredients that deliver energy, CLIF Bars have whole ingredients you can see and taste, such as rolled oats, fruits and nuts, Each bar contains Phosphorus which contributes to energy-yielding metabolism, The bars are also a source of protein and fibre
Whole ingredients you can see and taste, such as organic rolled oats, organic oat fibre and organic dates, No hydrogenated oils or high fructose corn syrup
ALLERGENS Chocolate Chip Flavour: MAY CONTAIN PEANUTS, NUTS, MILK, SESAME, RYE, TRITICALE AND WHEAT
ALLERGENS Blueberry Almond Crisp Flavour: MAY CONTAIN PEANUTS, OTHER NUTS, MILK, SESAME, RYE, TRITICALE AND WHEAT. MAY CONTAIN NUTSHELL
ALLERGENS Crunchy Peanut Butter Flavour: MAY CONTAIN NUTS, MILK, SESAME, RYE, TRITICALE AND WHEAT
ALLERGENS White Chocolate Macadamia Nut Flavour: MAY CONTAIN PEANUTS, OTHER NUTS, MILK, SESAME, RYE, TRITICALE AND WHEAT. MAY CONTAIN NUTSHELL FRAGMENTS
ALLERGENS Chocolate Almond Fudge Flavour: MAY CONTAIN PEANUTS, OTHER NUTS, MILK, SESAME, RYE, TRITICALE AND WHEAT. MAY CONTAIN NUTSHELL FRAGMENTS
ALLERGENS Peanut Butter Banana with Dark Chocolate Flavour: MAY CONTAIN PEANUTS, MILK, SESAME, RYE, TRITICALE AND WHEAT

Science in Sport GO Energy Bakes, 30 g Carbs, High Carb Soft-Filled Baked Energy Snack, Strawberry Flavour, 12 Bars

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Why We Love It

Delicious, fruit-filled energy boost.
Improves exercise performance effectively.
Scientifically tested, athlete-approved.

Main Highlights

GO Energy Bake adopts a scientific approach to energy bars, delivering 30 g of carbohydrate in a soft filled bake. Each bake has a fruit centre providing 10 g fructose
Delivering additional carbohydrate during exercise is known to improve performance, race times and delay the onset of fatigue. Go Energy bake provides that boost in performance in a delicious baked bar with a gooey fruit filled centre
Research has shown that carbohydrate from energy gels, Energy drinks and bars can all be utilised at similar rates, and as such, SiS GO Energy Bake provides an alternative and delicious, easily digestible format of carbohydrate to consume during exercise
Informed Sport Registered: Science in Sport's complete product range is developed using a world-class approach to banned substance testing right here in the UK. Providing assurance for athletes, or just for people who are conscious of what their supplements actually contain

Food Connections Better For You* Flapjack Bars (Box of 30x 80g Bars) - Healthier Snack Flapjacks in 6x Flavours, UK Government HFSS Compliant

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Why We Love It

Six delicious, healthy flavors.
Handmade with dedication.
Suitable for vegetarians.

Main Highlights

HEALTHIER FLAPJACKS: Carefully developed to be lower in fat, salt, and sugar, these HFSS compliant flapjacks meet UK Government standards and are great for more mindful snacking. They still taste delicious; they are just better for you!
SIX FLAVOURS: This mixed box of 30 HFSS compliant flapjack energy bars contains a tasty selection of 6x different delicious flavours, which all have reduced saturated fat. Flavours including Oaty, Bakewell, Chocolate Caramel, Chocolate Chip, Strawberry Jam and Sultana & Cherry. You will receive 5x of each flavour in your box of 30.
SUITABLE FOR VEGETARIANS: Each flavour oat bar is suitable for vegetarians, making the multi pack of flapjacks a great source of energy and protein for those on a plant based diet. Individually wrapped, these ambient protein flapjacks have a 26-week shelf life, making them ideal for schools, cash and carries and convenience stores. Delicious healthy snacks for adults and children.
SLOW RELEASE ENERGY: Stay energised for longer with our delicious flapjacks, delivering oaty slow release energy throughout your day. The slow energy release of the oat protein flapjack bars makes them a great alternative to a traditional protein bar. Whether you are looking for an afternoon snack or a pre workout boost, these flapjack protein bars can meet your needs in a number of ways. The flapjacks multipack of 30 snack box contains enough nutritional protein bars to last you for weeks.
FOOD CONNECTIONS: Established in 1992 with the aim of creating high quality handmade snacking products, we’ve gained a respected and trusted reputation over the years. Still run by the family, our purpose-built bakery continues to uphold our motto of quality and tradition in every case.
*Better For You - when compared to Food Connections Standard Flapjack Range

HIGH5 Energy Bars - High Carb Energy Bars for Running, Cycling & Hiking - Vegan Oat Bars with Real Fruits - Healthy Snacks for Adults - Snack Bars Multipack for Training & Racing (12x55g, Berry)

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Why We Love It

Boosts energy with real fruits.
Balances simple and complex carbs.
No artificial sweeteners, colourings.

Main Highlights

Sustained Support for Endurance: nutrition bars deliver a blend of simple and complex carbohydrates for long-lasting energy during exercise or daily activities - Each oat bar contains 39g carbs and 189 kcal, ideal as cycle nutrition or running fuel
Clean Ingredients for Healthy Eating: made with real fruits and oats, healthy bars are free from artificial additives and sweeteners - Each fruit bar offers carbohydrates for high energy - Perfect energy cubes to gift as nutrient bars snack pack
Soft Texture & Delicious Flavours: enjoy these easy-to-chew, energy chews during intense workouts or throughout the day as healthy snack bars (dried fruit snacks) - With a satisfying texture and taste, these fruit bars are flavour-rich natural bars
Performance-Focused Sports Nutrition: these energy bites are designed for athletes and active individuals - Use them as cycling supplements or running nutrition before or during workouts to boost energy levels - Great mountain fuel hiking snacks
Convenient and Portable Multipack Snacks: compact and individually wrapped for easy carrying, these healthy food bars come in a 12x55g pack - Perfect as travel snacks, endurance bars or office snacks, ideal for on-the-go energy wherever you need it
Vegan & Dairy Free Snacks: HIGH5 energy blocks are delicious, vegan snack bars - These high calorie bars are suitable for vegans and perfect for carb loading, ensuring compatibility with your sports nutrition and endurance diet plan

Nakd Fruit & Nut Bar Variety Pack - Vegan - Healthy Snack - Gluten Free - 35g x 18 bars

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Why We Love It

Unique combination of natural ingredients.
Promotes clean, simple eating.
Ideal for on-the-go snacking.

Main Highlights

MADE WITH DELICIOUS NATURAL INGEDIENTS – a unique combination of fruit & nuts cold-pressed together without heat into tasty raw bars. Choose your favourite from our variety of mind-popping and popular flavours from Peanut Delight, Cocoa Delight to Blueberry Muffin and Salted Caramel.
nākd. RAW FRUIT & NUT BARS – are nothing like your average cereal, chocolate and breakfast bars. They have no artificial flavourings, colours or preservatives, we don’t’ add any sugar or honey but keep it real and simple, we just add natural ingredients. That’s it!
CLEAN, SIMPLE EATING – a snack bar containing 100% natural ingredients, no added sugar, is raw-cold pressed, has a source of fibre, vegan, gluten, dairy free, has no preservatives and is Kosher certified.
FIND YOUR FAVOURITES - This selection box features 3 each of our top 6 flavours including Blueberry Muffin and Peanut Delight
PERFECT SNACK - individually wrapped & sized for purses, backpacks, lunchboxes or snacking on-the-go

8.7

Excellent

We scanned 1605 products

We reviewed these offers relevant to the Energy 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 Science in Sport, Warrior, Clif Bar, STYRKR, Grenade, Clif Mojo, Food Connections, HIGH5, Nakd, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Energy Bars in the market, we considered we took a deep dive into 8026 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 SIS Go Energy Bar, High Carb, Fruit Infused Energy Bar, Chocolate Fudge Flavour (30 Packs). We love many things about this product by Science in Sport. What sets it apart from the competition is Nutritious and easily digestible, Practical for active lifestyles. , Assures substance safety.
The best value product for most shoppers and where user satisfaction is continuously the highest is 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 (Honey Berry) by Warrior based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Energy Bars and the best cost-to-value ratio is HIGH5 Energy Bars - High Carb Energy Bars for Running, Cycling & Hiking - Vegan Oat Bars with Real Fruits - Healthy Snacks for Adults - Snack Bars Multipack for Training & Racing (12x55g, Berry)at HIGH5 with a 40% discount.
Our list of the best Energy 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 Energy Bars in The UK

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We scanned 1605 products

We concluded that: