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The 10 best protein bars to buy in the UK

Picture of a protein bar

The best protein bars offer a convenient source of protein and various other nutrients, making them a popular product for many people. However, not all protein bars are as healthy as they appear, with many having high sugar content that make them less effective than others. With so many options available, it’s difficult to know what the best protein bar is for your needs, especially when buying for the first time.

Check out the buying guide below for how to choose the best protein bar:


What are protein bars?

A protein bar is a nutritional snack with high protein content, featuring a much higher proportion compared to other nutrients such as carbohydrates and fats. Mostly used for dietary purposes, protein bars come with various purposes, such as meal replacement, increased energy, and building muscle.

Why should you buy a good protein bar?

A good protein bar offers various benefits for people on a strict diet or exercise regime. For instance, offering high protein content they are a popular snack for exercise enthusiast looking to build to muscle, with pre and post snack workout bars available.

Others use a protein bar as a meal replacement when dieting, with high protein content being a great nutrient for curbing appetites. Some people use protein bars for their high nutrient content, eating them as a healthy snack that offers ample energy.

Plus, being a small snack, protein bars are incredibly convenient no matter their purpose, offering a quick snack that can be eaten between meals or as a replacement meal.

How to choose the right protein bar?

Another picture of a protein bar

With so many different products to choose from, finding the best protein bar isn’t always easy. With so many ingredients, purposes, and flavours to choose from, it is important to make a few considerations before you buy.

  • Protein Content: The best protein bars have the highest protein content, so be sure to inspect this whenever buying. Some are deceptively low on protein, with a good average being around 20g per bar. Those with lower protein content may offset the difference with other macronutrients like carbs, which may be preferable depending on whether you’re exercising before or after you eat it.
  • Carb Content: The carb content of a protein bar is also important, with around 15-20g being the idea amount. Remember, you want more protein than anything else, so make sure to check the proportion of carbs to protein. However, higher carb content is good for certain purposes, typically high-cardio workouts they offer more sustained energy.
  • Sugar: Always try to buy protein bars with low sugar content, as this is an unnecessary ingredient that can hamper diets and workouts. Anything with around 1 to 2g of sugar is recommended and be sure avoid anything with 5g or more.
  • Flavour: Although mostly subjective, be sure to consider the flavour of the bar in relation to the ingredients. Yes, something more flavourful such as cookies and cream protein bar may taste amazing, but it should never be at the expense of healthy ingredients - you want protein and nutrients, not just a tasty snack!

What is the best kind of protein bar in the UK?

There are many types of protein bars available, all of which have different purposes and may be suitable for your needs.

  • Nutrition Bars: This type of protein bar balances high protein content with other nutrients and vitamins. This is great for getting all the stuff you need for a healthy diet or for a pre/post work out snack. Also good for a snack on the go as it offers a good balance of nutrients to keep you feeling good.
  • Low Carb Bars: Not all protein bars feature low amounts of carbs, which is often desired by those looking to build lean muscle while losing weight or for cutting back on carbs in general. A great protein bar for maintaining a steady blood sugar level, low carb bars also help to curb appetites.
  • Meal Replacement Bar: The best protein bars for dropping a few pounds, meal replacement bars are nutrient dense so are an excellent addition to a weight-loss diet.

Top 10 list of protein bars in the UK 2024

The bestseller list compares brands and their protein bars. Which protein bar is the best?
Best choice TOP 1
Image of Grenade  protein bar
Grenade High Protein, Low Sugar Bar - Oreo, 12 x 60 g
  • Certified with the Informed Sport Programme and therefore suitable for use by drug…
  • This indulgent low sugar snack is perfect for enjoying at any time of the day as…
  • Each triple-layered bar consists of genuine OREO Vanilla, a protein nougat loaded…
Offer TOP 2
Image of Warrior WAR1012/100/104 protein bar
Warrior Raw Protein Flapjack, Chocolate Peanut Butter - 12 bars
  • Rich in fibre. High in protein. Low in sugar.
Image of Warrior  protein bar
Warrior, CRUNCH - High Protein Bars - 20g Protein Each Bar - 12 Pack…
  • PACK OF 12 PROTEIN BARS - 12 individually wrapped, High Protein bars. Enjoy post-workout…
  • CHEWY CRISPY SNACK BAR - Made with crunchy crispy pieces covered in a triple layer…
  • LOW SUGAR - With less than 3g of sugar, these High Protein bars help keep blood sugar…
Image of Amfit Nutrition 5400606010284 protein bar
Amazon Brand - Amfit Nutrition Low Sugar High Protein Bars, Chocolate…
  • This product is made with certified sustainable palm oil. The supplier of this product…
  • Not suitable for Nut, Peanut and Egg allergy sufferers due to manufacturing meth…
  • Warning: Excessive consumption may produce laxative effects
Image of Fulfil FULCSC15 protein bar
Fulfil Vitamin and Protein Bar (15 x 55 g Bars) — Chocolate…
  • LIFE'S WONDERFUEL: We want FULFIL bars to fuel you on all of your everyday adventures,…
  • OUR PACKS CONTAIN 15 BARS: So you never run out of your favourite protein bar
  • DELICIOUS and NUTRITIOUS: FULFIL bars are not your average protein bar. Our Chocolate…
Image of Amfit Nutrition 5400606969568 protein bar
Amazon Brand - Amfit Nutrition Low Sugar High Protein Bars, Chocolate…
  • Not suitable for Peanuts and Eggs allergy sufferers and Coeliacs due to manufacturing…
  • High Fibre
  • The perfect snack for on-the-go
Image of TREK 1514 protein bar
TREK High Protein Flapjack Salted Caramel - Gluten Free - Plant Based…
  • HIGH IN FIBRE – Keep yourself full with this oat packed high protein snack
  • GLUTEN FREE – TREK Salted Caramel Flapjack is wheat and gluten free
  • HIGH IN PROTEIN – Each flapjack is packed with 9g of natural plant-based p…
Image of PhD Nutrition 130167 protein bar
PhD Smart Hight Protein Bar Low Sugar, Nutritional Protein Bars/Protein…
  • Versatile and Suitable for All: Suitable for both men and women; Smart bars also…
  • Weight Loss Aid: Ideal for pre-workout snacking or post-workout recovery, these bars…
  • Nutritional Bars: These bars deliver 20g of high-quality whey protein and less than…
Image of USN SCB002 protein bar
USN Trust Cookie Bar, Triple Chocolate Protein Cookie: High Protein…
  • Perfect for those on the go: Convenient and macro friendly, these delicious protein…
  • Amazing taste: Our Trust Cookie high protein bars come in three delicious flavours.…
  • High in protein: Each USN Trust Cookie protein bar contains 15g of protein, contributing…
TOP 10
Image of Mars  protein bar
Mars Hi Protein Bar (12 x 59g) - High Protein Energy Snack with Caramel,…
  • Only 207 kcals per bar. Not suitable for vegetarians.
  • Every case contains 12 individually wrapped bars perfect for a post workout snac…
  • Contains 54% less sugar than a standard Mars 51g bar
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We participate in the Amazon Associates Program. As an Amazon Associate we earn from qualifying purchases. We consider only products that are available on Amazon while the ranking is based on factors such as customer reviews, number of sales and keyword. Last Update: 2023/12/11.