10 Best Hi Protein Low Calorie Bars in The UK
Last updated on 08/09/2025
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Best Choice
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Premier Protein - High Protein Bar 50% - Multiflavourbox - 20x40g - Low Sugar - Low Carb - High Protein Bar
Premier Protein
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Premier Protein
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
Value for Money
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Reflex High Protein Bars – Twin 21g Protein Bars Low Calorie, Low Sugar, High Fibre, Vegetarian – Chocolate Protein Snacks – Great Taste & Texture (Chocolate Toffee Crispy, 12x60g )
Reflex
23% OffFree Shipping
Reflex
Reflex High Protein Bars – Twin 21g Protein Bars Low Calorie, Low Sugar, High Fibre, Vegetarian – Chocolate Protein Snacks – Great Taste & Texture (Chocolate Toffee Crispy, 12x60g )
23% OffFree Shipping
Why We Love It
- High protein for muscle recovery.
- Delicious snacks for flexible portioning.
- Satisfying taste without extra sugar.
Main Highlights
- High Protein, Low Sugar Protein Bars: each Reflex Twin Bar delivers 21g of complete protein from milk and soy isolates – helping to support muscle growth and recovery with just 185 kcal and 1.6g sugar per 60g bar for clean, lean fuel
- Delicious Twin Format Design: two soft-centred, crispy chunks per pack – perfect high protein snacks for flexible snacking and portion control – enjoy both pieces or save one for later without compromising on freshness or flavour
- A Satisfying Treat with Functional Benefits: with indulgent flavour options (Salted Caramel Crunch and Chocolate Toffee Crispy) Reflex protein chocolate bars offer a nougat-soft centre with crispy pieces and rich chocolate coating
- Refuel Without Compromise: Reflex Twin Bars are made for busy, active lifestyles – enjoy on-the-go after the gym, between meals, or whenever you need a protein top-up without the extra sugar, calories or artificial fillers
- High Fibre, Vegetarian Protein Bars, HFSS Compliant: made using only high-quality milk and soy protein isolates (no collagen or gelatine) - Reflex vegetarian, gluten free protein bars are a smart, feel-good high protein food snacking choice
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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
Mars
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Mars
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.
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Snickers Hi Protein/Low Sugar Protein Bar Box of 12 x 57g
Snickers
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Snickers
Snickers Hi Protein/Low Sugar Protein Bar Box of 12 x 57g
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Why We Love It
- Epic taste, lower sugar intake.
- Perfect snack post workout.
- Comes with a tote bag.
Main Highlights
- The epic taste of Snickers with 20g of protein and only 2g sugar? Now that�s satisfying! Snickers Hi Protein Low Sugar boasts all the caramel, nougat, and peanut flavours you know and love from the iconic Snickers bar, covered in a delicious chocolatey coating and only 232 calories.
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Snickers - High Protein Bars | Low Sugar, Only 2g of Sugar per bar, Hazelnut and Milk Chocolate Flavour, 12 x 57g Box, 20g Protein
Snickers
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Snickers
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.
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Snickers - HI Protein Bars | Low Sugar Bars, Only 1g of Sugar per bar, Dark Chocolate, 12 x 57g Pack, 20g Protein
Snickers
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Snickers
Snickers - HI Protein Bars | Low Sugar Bars, Only 1g of Sugar per bar, Dark Chocolate, 12 x 57g Pack, 20g Protein
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Why We Love It
- Iconic taste with protein boost.
- Guilt-free indulgence, low sugar.
- Perfect snack, 215 calories.
Main Highlights
- Protein power: Craving Snickers? Now you can get the iconic taste you love with a protein boost! Our Snickers dark chocolate low sugar Hi-protein bars deliver 20g of protein, with just 1g sugar per bar.
- Layers of indulgence: Each bar is packed with crunchy peanuts, chewy caramel and coated in rich dark chocolate.
- Fuel your day: With only 215 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 and peanuts. May contain nuts, egg and gluten.
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Snickers Hi Protein Peanut Butter Flavour Bar (12 x 57g) High Protein Snack with Caramel, Peanuts and Mild Chocolate - Contain 20g Protein
Snickers
21% OffFree Shipping
Snickers
Snickers Hi Protein Peanut Butter Flavour Bar (12 x 57g) High Protein Snack with Caramel, Peanuts and Mild Chocolate - Contain 20g Protein
21% OffFree Shipping
Why We Love It
- Phenomenal Snicker Bar delight.
- High protein, tasty snack.
- Promotes muscle recovery efficiently.
Main Highlights
- Phenomenal Snicker Bar flavour is perfect
- Same chocolate coating and caramel snack but with 19g protein per bar
- Diverse array of protein sources to promote muscle recovery
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FitnesSHOCK High Protein Bars 20G Protein Content, No Added Sugar, Low Calorie, Low Carb, Rich in Fibre, Pistachio Cake Flavour 12Pcs 60G
FitnesSHOCK
15% OffFree Shipping
FitnesSHOCK
FitnesSHOCK High Protein Bars 20G Protein Content, No Added Sugar, Low Calorie, Low Carb, Rich in Fibre, Pistachio Cake Flavour 12Pcs 60G
15% 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.
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Fitnesshock Protein Bars No Added Sugar, Low Carb, High Fiber Snack – Palm Oil Free, Rich in Flavor | Coconut | 12x50g
FitnesSHOCK
4% OffFree Shipping
FitnesSHOCK
Fitnesshock Protein Bars No Added Sugar, Low Carb, High Fiber Snack – Palm Oil Free, Rich in Flavor | Coconut | 12x50g
4% OffFree Shipping
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
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Snickers - White Chocolate Low Sugar Protein Bars | 12 x 57g Pack, Only 2g of Sugar per Bar, Hi Protein Energy Snack, 20g Protein
Snickers
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Snickers
Snickers - White Chocolate Low Sugar Protein Bars | 12 x 57g Pack, Only 2g of Sugar per Bar, Hi Protein Energy Snack, 20g Protein
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Why We Love It
- Epic taste with high protein.
- Uncompromised Snickers flavor.
- Great for post-workout snacking.
Main Highlights
- The epic taste of Snickers White with 20g of protein and only 2g sugar? Now that’s satisfying!
- Snickers White Hi Protein Low Sugar boasts all the caramel, nougat, and peanut flavours you know and love from the iconic Snickers bar, covered in a delicious chocolatey coating.
- Only 218 kcals 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.