10 Best Usn Protein Bars in The UK

Last updated on 20/07/2025

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

Why We Love It

Healthy, high-protein, low-sugar snacks.
Packed with nine essential vitamins.
Tastes deliciously indulgent.

Main Highlights

HIGH PROTEIN AND LOW SUGAR BARS: Each 55g bar contains 20g of protein, less than 2 grams of sugar and only 206 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 Butter Flavour contains a deliciously smooth peanut butter centre with a soft creamy layer, surrounded in an indulgent milk chocolate coating and topped with a crunchy layer of peanuts. A ideal snack for chocolate lovers but with added benefits
15 PROTEIN PACKED BARS: ideal for stocking up your cupboard with your favourite protein snack
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

USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Caramel Peanut Flavour - 2kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAA Powder For Maximum Muscle Growth, Post Workout Recovery Drink Mix

10% Off

Why We Love It

Effective all-in-one protein shake.
Boosts physical performance greatly.
Reduces muscle protein breakdown.

Main Highlights

USN Muscle Fuel Anabolic protein drink mix: High protein shake powder with Vitamins, Minerals, Carbohydrates, BCAAs, Amino Acids and Creatine. Premium dietary supplement designed to support muscle building
Premium women's and men's supplements: USN diet supplements offer proven benefits, when taken alongside a balanced diet and healthy lifestyle. Always consult a healthcare professional first
Mass gainer protein powder: Caramel Peanut flavoured drink powder with 54g of premium quality protein, 77g of carbohydrates and 850mg of HMB to support muscle recovery, growth and performance
Reach your goals: All in one muscle gain building stack, combined with raw creatines and carbohydrates, so creatine is easily absorbed and transported around the body. Easy to mix with water
Ultimate Sports Nutrition: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout

USN Trust Crunch Fudge Brownie Protein Bars: Indulgent and Filling High Protein Snacks - 20g Protein Per Bar (12 x 60g Bars)

Why We Love It

High protein, low sugar snack.
Ideal for fitness enthusiasts.
Trusted brand, quality ingredients.

Main Highlights

High protein bars: USN Trust Crunch are high protein bars that contain 20g of protein to help support the growth and maintenance of muscle mass—giving you an edge pre and post workout.
Low-sugar protein bar: Satisfy your sweet tooth with these Fudge Brownie flavoured high protein snack bars. A delicious option, with only 1.6g of sugar per serving, to help keep you full when the sweet cravings hit.
Great on-the-go: Trust Crunch is the ideal protein snack for fitness fans, athletes and those looking to increase the amount of protein in their diets.
Eat smarter: Our Trust Crunch Fudge Brownie flavour protein bar contains only 213 kcal per serving and is high in fibre. Enjoy as part of a healthy and balanced diet.
Over 20 years of world class nutritional supplements: USN have been at the forefront of sports nutrition for over 20 years, so you know that every bite of a Trust Crunch has been sourced from the highest quality raw materials and developed by leading researchers.

USN Blue Lab Whey Protein Powder: Caramel Popcorn - Whey Protein 2kg - Post-Workout - Whey Isolate - Muscle Building Powder Supplement With Added BCAAs

23% OffFree Shipping

Why We Love It

High-quality whey isolate protein.
Loaded with essential BCAAs.
Promotes muscle building effectively.

Main Highlights

USN Whey Protein powder: Blue Lab USN Protein Powder contains premium Whey Isolate, Whey Hydrolysate and Whey Concentrate, giving up to 25g of Protein. With Amino Acids, Enzymes and added BCAAs
Premium women's and men's supplements: USN diet supplements offer proven benefits, when taken alongside a balanced diet and healthy lifestyle. Always consult a healthcare professional first
Tasty post workout recovery drink: USN Whey Protein isolate supplement blend, for optimal muscle growth and support, scientifically formulated to help encourage lean muscle maintenance in the body
Supports your workout goals: Tasty, high-protein complete premium drink powder blend. Created using only the best quality proteins. Easy to mix and can be enjoyed at anytime of day
Ultimate Sports Nutrition: USN are at the forefront of sports nutrition research, making effective nutrition supplements for professional and non-professional athletes - pre, post or intra workout

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)

Free Shipping

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

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

Optimum Nutrition Marshmallow Protein Bar, 10 x 65 g

12% OffFree Shipping

Why We Love It

Unique texture, great taste.
Supports nutritional goals.
Versatile workout snack.

Main Highlights

Experience the unique texture and great taste of Optimum Nutrition's protein bars to help support your nutritional goals
ON protein bars are versatile protein snacks packed with 20 g of protein, helping you daily to stay on top of your fitness goals
Sports nutrition protein bars with no added sugar* are great-tasting snack alternatives designed for active people and professional athletes
Enjoy the crunch of Chocolate Brownie and Marshmallow Crunch bars, or indulge in the Nutty Chocolate Caramel, bursting with peanuts and raisins
Protein snacks suitable for vegetarians, to be enjoyed on the go, as a post-workout and pre-workout snack, for both men and women
*Contain naturally occurring sugars

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

Free Shipping

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.

USN Diet Fuel Ultralean Meal Replacement Shake Powder, Vanilla Flavour - 1kg, High Protein Shake Powdered Drink Mix, Low Calorie Diet & Weight Control Powder, 25g Protein

23% OffFree Shipping

Why We Love It

Promotes fullness with protein and fiber.
Supports healthy, sustainable weight loss.
Maintains normal blood sugar levels.

Main Highlights

USN Protein powder drink mix: High protein meal replacement shake powder to help support your weight loss goals. With added vitamins, each tasty diet shake you make can help you feel full for longer
Premium women's and men's supplements: USN diet supplements offer proven benefits, when taken alongside a balanced diet and healthy lifestyle. Always consult a healthcare professional first
USN meal replacement shakes: A tasty USN meal replacement beverage powder with 25g protein and under 210 calories. Filled with all your essential vitamins and nutrients - simply add 2 scoops to cold water
Achieve your aims: Contains 1kg of great tasting Vanilla flavour powdered protein, that can also be made up as a snack between meals, to help hit your daily protein goals and reduce sweet cravings
Ultimate Sports Nutrition: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout

USN Trust Cookie Bar, Salted Caramel Protein Cookie: High Protein Bars, Perfect On-the-Go and Post-Workout Protein Snacks (12 x 60g Bars per Pack)

17% OffFree Shipping

Why We Love It

Delicious and protein-packed snack.
Optimizes post-workout recovery.
Comes in tasty flavors.

Main Highlights

The best of both a protein bar and protein cookie: This is a delicious protein snack, baked like a cookie but packs the punch of a high protein bar
Essential snack for post-workout recovery: This could be our best tasting protein bar yet! We formulate Trust Cookie with the ideal balance of carbs and protein—helping you optimise your post-workout after long training sessions
High in protein: Each USN Trust Cookie protein bar contains 15g of protein, contributing towards the development of your muscle mass. Plus, it’s suitable for vegetarians!
Amazing taste: Our Trust Cookie high protein bars come in three delicious flavours. Discover an indulgent White Chocolate and Raspberry, smooth Salted Caramel or decadent Triple Chocolate protein cookie today. You’ll be blown away by the taste!
Perfect for those on the go: Convenient and macro friendly, these delicious protein snacks are ideal for those who don't have time to prep food before their workout, but still want tasty nutrition that contributes to their muscle maintenance and growth

8.7

Excellent

Save 17%

We scanned 1983 products

We reviewed these offers relevant to the Usn Protein 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, USN, PhD, Grenade, Optimum Nutrition, Snickers, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Usn Protein Bars in the market, we considered we took a deep dive into 9916 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 Peanut Butter 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 Healthy, high-protein, low-sugar snacks, Packed with nine essential vitamins, Tastes deliciously indulgent.
The best value product for most shoppers and where user satisfaction is continuously the highest is USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Caramel Peanut Flavour - 2kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAA Powder For Maximum Muscle Growth, Post Workout Recovery Drink Mix by USN based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Usn Protein 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 29% discount.
Our list of the best Usn Protein 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 Usn Protein Bars in The UK

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We scanned 1983 products

We concluded that: