10 Best Protein Bars For Weight Loss in The UK

Last updated on 04/07/2025

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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 (Cocoa Hazelnut)

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Why We Love It

Tasty, healthy, vegan snacks.
Achieved perfect ketogenic scores.
No sugar spike ingredients.

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!

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

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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.

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

29% Off

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

NICKS Protein Bar Mix Box, Keto Snack Bars 4g Net Carbs, 15g Protein, 5g Collagen No Added Sugar Gluten Free Low Carb Snacks (9x50g)

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Why We Love It

Flavors indulge every sweet tooth.
Great protein source, low carbs.
Gluten-free, stabilizes blood sugar.

Main Highlights

DELICIOUS Keto milk chocolate protein bar in 4 different flavor variations, in total 9 bars in each variety box
30% HIGH QUALITY COMPLETE PROTEIN from whey and milk plus additional collagen peptides
LOW IMPACT CARBS with less then 4g Net carbs and 190-214 calories per bar
GLUTEN FREE & WITHOUT PALM OIL as wheat and gluten spikes your blood sugar levels
KETO PROTEIN SNACK and treat which can help you overwin your sugar cravings in a more healthy and guilt-free indulgence

SlimFast Tasty Balanced Meal Bar, Low Calorie Replacement Bars for Weight Loss and Diet, High Protein, Healthy Snacks for Adults with 23 Vitamins and Minerals, Rocky Road Flavour, Multipack, 16 x 60 g

Why We Love It

Promotes weight loss effectively.
Packed with multivitamins and minerals.
Tantalizing range of flavors.

Main Highlights

NEVER RUN ON EMPTY: SlimFast low-calorie snacks are ready-to-eat high protein meal replacement bars that support your weight loss and help to keep it off*: 14-15 g of protein and less than 230 kcal per bar
MULTIVITAMIN AND MINERAL POWERHOUSE: protein snacks with 23 vitamins and minerals (incl. Vitamin A, Vitamin D, Vitamin C, Vitamin B6, Vitamin B12, magnesium and zinc) per meal replacement bar
IRRESISTIBLE FLAVOURS: ready-to-eat meal replacement bars for weight loss come in 4 delish flavours (Choc Chip, Rocky Road, Choc Orange and Very Berry), no artificial colour, flavours or preservatives
SATISFY HUNGER: Enjoy two SlimFast meal replacement bars a day as part of our 3.2.1 plan to help you lose weight and keep it off, or enjoy it as part of your balanced diet
Substituting two main daily meals with meal replacements contributes to weight loss, and substituting one contributes to weight maintenance. Source: COMMISSION REGULATION (EU) No 432/2012 of 16 May 2012

Shake That Weight Lemon Meal Bars - 10 Meals, 14g Protein, Gluten-Free, Low Sugar Meal Replacement Bars for Weight Loss, High Fibre, Vegetarian

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Why We Love It

Aids quick, effective weight loss.
Tasty lemon flavor satisfies cravings.
Curbs hunger, supports health.

Main Highlights

ZESTY LEMON TASTE: 10 meal bars with a tangy lemon core coated in smooth yoghurt, offering a refreshing, sweet option for your weight loss plan.
HIGH PROTEIN POWER: Each bar delivers 14g protein to curb hunger, support muscle maintenance, and keep you satisfied during your diet.
LOW CALORIE CONTROL: At 204 calories per bar, fits 800-1200 kcal plans (Total, Everyday, Active) for effective, guilt-free weight loss.
GLUTEN-FREE GOODNESS: Gluten-free, high fibre, with 20+ vitamins and minerals, providing balanced nutrition for dietary needs. Suitable for vegetarians.
CONVENIENT ANYWHERE: Individually wrapped, palm oil-free bars, perfect for a quick, nutritious meal replacement on-the-go or at home.

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

Convenient and Tasty Protein Snack: PHD Smart Protein Bar is designed for on-the-go convenience. It features a soft whey protein core, caramel and protein crispies for a satisfying crunchy texture.
Guilt-Free Snacking: Each bar is topped with a smooth chocolate coating, ensuring guilt-free snacking while keeping your dietary macros in check. GMO-free and Palm Oil Free
Nutritional Bars: These bars deliver 20g of high-quality whey protein and less than 3g of sugar per serving, available in various flavors like Birthday Cake and White Chocolate Blondie.
Weight Loss Aid: Ideal for pre-workout snacking or post-workout recovery, these bars are designed to provide a protein boost when needed, aiding in weight loss through a calorie deficit.
Versatile and Suitable for All: Suitable for both men and women; Smart bars also serve as versatile toppings for homemade recipes, making them a great addition to a lean lifestyle.

Snickers - Milk Chocolate Low Sugar Protein Bars | 12 x 57g Pack, Only 2g of Sugar per bar, Hi Protein Energy Snack, 20g Protein

Why We Love It

Snickers flavor with more protein.
Less sugar, still satisfyingly delicious.
Ideal post workout snack.

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.
Only 217 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.

SnackSmart Keto Protein Bars with Slimbiome® – Low Carb, High Protein, Low Sugar Snack for Weight Loss & Gut Health – Prebiotic, Ozempic-Friendly Chocolate Peanut Bar (12 x 35g)

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Why We Love It

Supports digestive health naturally.
Packed with protein power.
Ideal for on-the-go.

Main Highlights

✅ Supports Gut Health & Digestion with Slimbiome – Infused with prebiotic fiber and Slimbiome, scientifically designed to nourish good bacteria, improve digestion, and promote a balanced gut microbiome with every bite.
✅ High Protein for Energy & Muscle Support – Each bar packs 12g of high-quality protein, helping to curb hunger, fuel workouts, and support muscle recovery & maintenance.
✅ Low Sugar, No Blood Sugar Spikes – Ozempic-Friendly – With less than 3g of natural sugars, this low-glycemic snack ensures steady energy without sugar crashes—ideal for those following an Ozempic weight loss plan.
✅ Perfect On-the-Go Snack – Individually wrapped for busy lifestyles, making it an ideal post-workout snack, office treat, travel companion, or meal replacement bar.
✅ Weight Loss & Keto-Friendly with Slimbiome – Specially formulated with a low-carb, high-fiber blend, including Slimbiome, to suppress appetite, support weight loss, and fit into ketogenic and low-sugar diets.

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

7% OffFree Shipping

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

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We scanned 1611 products

We reviewed these offers relevant to the Protein Bars For Weight Loss 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 Keto Keto, FitnesSHOCK, Grenade, N!CK'S, SlimFast, Shake That Weight, PhD, Snickers, SnackSmart, 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 Protein Bars For Weight Loss in the market, we considered we took a deep dive into 8056 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 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 (Cocoa Hazelnut). We love many things about this product by Keto Keto. What sets it apart from the competition is Tasty, healthy, vegan snacks, Achieved perfect ketogenic scores, No sugar spike ingredients.
The best value product for most shoppers and where user satisfaction is continuously the highest is FitnesSHOCK High Protein Bar Mix Box, 12g Protein, Low Carb, No Added Sugar, 5g collagen, Fiber-Rich, Low Calorie 140 Kcal, 12x40g by FitnesSHOCK based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Protein Bars For Weight Loss 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 29% discount.
Our list of the best Protein Bars For Weight Loss 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 For Weight Loss in The UK

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We scanned 1611 products

We concluded that: