10 Best High Protein Cereal Bars in The UK

Last updated on 16/07/2025

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Grenade

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

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Why We Love It

High protein, low sugar content.
Indulgent layered flavor experience.
Certified for athlete consumption.

Main Highlights

HIGH PROTEIN: Packed with protein, with over 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 chocolate chips
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

Nature Valley Protein Peanut & Chocolate Gluten Free Cereal Bars 4 x 40g (Pack of 8, total 32 Bars), Packaging May Vary

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Why We Love It

High in protein and fiber.
Free from artificial ingredients.
Suitable for vegetarians.

Main Highlights

Ideal Product
Suitable for vegetarians; carefully selected ingredients
Nature Valley protein cereal bar

Nature Valley Protein Peanut & Chocolate Gluten Free Cereal Bars, 40 g (Pack of 26 )

Why We Love It

Ideal for on-the-go snacks.
High in protein and fibre.
No artificial flavours or preservatives.

Main Highlights

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 Biscuits?
Packaging may vary

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

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

Trek High Protein Flapjack Cocoa Oat, 50 g - Gluten Free Bars – Healthy Snack Bars – Plant Based Protein - Vegan Bars (Pack of 16 Bars) | L0572375-P107199021-M107199013

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Why We Love It

Supports an active lifestyle.
Ideal for vegans.
Naturally protein-rich snack.

Main Highlights

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
IDEAL SNACK for active people, sport and fitness fans who are kind to their body
DELICIOUS - covered with a top layer of chocolate flavour topping, transforming the humble oatiness into a deep and satisfying taste

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

KIND Bars, High Fibre, Gluten Free Snack Bars, Chocolate Chip Cashew, No Artificial Colours, Flavours or Preservatives 12 x 40g

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Why We Love It

Tasty snack with wholesome ingredients.
Gluten-free and all-natural.
Pack of 12 bars.

Main Highlights

KIND Chocolate Chip Cashew bars are the perfect tasty snack
Chocolate Chip Cashew combines cashews, almonds and peanuts, topped with delicious chocolate chips.
This gluten free snack does not contain artificial sweeteners, flavours or preservatives
Pack of 12 Tasty, Gluten Free Bars

Nature Valley Protein Salted Caramel Nut Gluten Free Cereal Bars 12 x 40g

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Why We Love It

High in protein, gluten-free.
No artificial flavors or preservatives.
Perfect for post-workout.

Main Highlights

Protein snack bar, ideal for on-the-go snacks or a post workout treat
Nature Valley protein cereal bar
High in protein, high in fibre, gluten free; containing 20 Percent of your daily protein needs
Better tasting bars with no artificial flavours, colours or preservatives
Suitable for vegetarians; carefully selected ingredients

Eat Natural Apple, Ginger & Dark Chocolate Fruit & Nut Bars 12 x 40g

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Why We Love It

High fiber and gluten free.
Bursting with natural flavors.
Supports a happier planet.

Main Highlights

HIGH FIBRE* - A real palate pleaser, this bar’s ingredients were meant for each other! Taste dark chocolate, sweet apple, cranberries, and spicy ginger together. With crispy rice, creamy cashews and honey, this gluten free bar packs in flavour.
TASTES OF NATURE - Bursting with the authentic taste of nature, savour the mix of crunchy and soft along with the sweet and chewy of juicy fruit. It really is the tastiest way to snack!
MINIMAL FUSS - Nature’s own ingredients taste so good; they pretty much speak for themselves. Using minimal fuss recipes, we bring together these delicious ingredients to create a myriad of flavours.
WE CHOOSE QUALITY - We only want to work with the best that nature has to offer so every ingredient is carefully selected, meaning you can experience the true feel and taste of nature in every bite.
PLANET MATTERS - We’re on a journey to help create a happier planet. From minimising waste, to working with nature itself, and giving back to our local communities, we know great things are achieved when we all work together.

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

9.1

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We scanned 308 products

We reviewed these offers relevant to the High Protein Cereal 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 Grenade, Nature Valley, Fulfil, JB's TREK, Perkier, KIND, Eat Natural, 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 High Protein Cereal Bars in the market, we considered we took a deep dive into 1541 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 - Chocolate Chip Cookie Dough, 12 x 60 g (Packaging May Vary). We love many things about this product by Grenade. What sets it apart from the competition is High protein, low sugar content. , Indulgent layered flavor experience. , Certified for athlete consumption.
The best value product for most shoppers and where user satisfaction is continuously the highest is Nature Valley Protein Peanut & Chocolate Gluten Free Cereal Bars 4 x 40g (Pack of 8, total 32 Bars), Packaging May Vary by Nature Valley based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for High Protein Cereal Bars and the best cost-to-value ratio is Grenade High Protein, Low Sugar Bar - Chocolate Chip Cookie Dough, 12 x 60 g (Packaging May Vary)at Grenade with a 10% discount.
Our list of the best High Protein Cereal 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 Cereal Bars in The UK

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We scanned 308 products

We concluded that: