Best protein bar 2021

Which is the best protein bar in the UK?

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The 10 best protein bars to buy in the UK

The top 10 list of the best protein bars lists various brands and prices

Review10Best compares the best protein bars in the UK and selects the one by Grenade as the best protein bar. In a protein bar buying guide, you can read more about the features of the different protein bars and see a recommendation on which protein bar to buy in the UK in 2021. By considering the top list of protein bars, you can find the best protein bars and save time shopping online.


Table of contents

  1. Read the ultimate protein bar buying guide
  2. View the protein bar picks and see how they rank in the top list

SEE THE TOP 10 LIST →
(skip buying guide)


Best protein bars: A complete buying guide

All you need to know before buying a great protein bar

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.

Another picture of a protein bar
How to choose the right 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.
…are you ready for the best picks of 2021?

Top 10 list of protein bars in the UK (December 2021)

The bestseller list compares brands and their protein bars. Which protein bar is the best?
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Best choice* TOP 1
Image of Grenade 2020-10-00-00 protein bar
Grenade Carb Killa High Protein and Low Carb Bar, 12 x 60 g - A Selection Box*
  • Certified with the Informed Sport programme and therefore suitable for use by drug…
  • Carb Killa is an indulgent low sugar snack, ideal for enjoying at any time of the…
  • A selection of our latest Carb Killa bars
BUY NOW*
TOP 2
Image of Nature Valley 7006300049 protein bar
Nature Valley Protein Peanut & Chocolate Gluten Free Cereal Bars 26 x 40g*
  • Suitable for vegetarians; carefully selected ingredients
  • Better tasting bars with no artificial flavours, colours or preservatives
  • High in protein, high in fibre, gluten free; containing 20 Percent of your daily…
BUY NOW*
TOP 3
Image of Fulfil FULCSC15 protein bar
FULFIL Vitamin and Protein Bar (15 x 55g Bars) — Chocolate Salted Caramel Flavour — 20g High Protein, 9 Vitamins, Low Sugar*
  • 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 & NUTRITIOUS: FULFIL bars are not your average protein bar. Our Chocolate…
BUY NOW*
Offer* TOP 4
Image of Warrior P36546 protein bar
Warrior Raw Protein Flapjacks Bars x 75g Each Packed with 20g of Protein Supplements, White Chocolate Cranberry, 900 gram, (Pack of 12)*
  • PACK OF 12 x PROTEIN BARS - Save money with this multipack of 12 high protein bars.…
  • GREAT TASTE! - Chewy granola oat bar that can be eaten as a filling snack to help…
  • USE PRE OR POST WORKOUT - Eat pre workout for an energy boost or post workout to…
BUY NOW*
TOP 5
Image of PhD 130162 protein bar
PhD Smart Bar, High Protein Low sugar chocolate coated snack (Dark Chocolate Brownie), 12 Bars*
  • Convenient and healthy on the go snack
  • Palm oil free
  • Low carbs and low sugar - 0.4 - 1.9 g of sugar per bar
BUY NOW*
TOP 6
Image of Mars  protein bar
Mars Hi Protein Bar (12 x 59g) - High Protein Energy Snack with Caramel, Nougat and Real Milk Chocolate - Contains 20g Protein*
  • 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
BUY NOW*
TOP 7
Image of PhD 130118 protein bar
PhD Nutrition High Protein Flapjack+ Bars, Peanut Butter, 75 g, Pack of 12*
  • ; Ingredients: Oat Blend (Malted Oats (Barley Malt Extract, Palm Oil), Rolled Oats,…
  • 25 g of fibre per bar; oat blend for a great source of complex carbohydrates
  • low in sugar; only 2 g and contains less than 3 g saturated fat per flapjack
BUY NOW*
TOP 8
Image of SCI-MX Nutrition QSCIMXCOOKIE12SC protein bar
SCI-MX Nutrition High Protein Cookie Box, Strawberry and White Chocolate, Pack of 12 x 75 g*
  • Guilt free, great tasting and suitable for anyone leading a healthy, active life…
  • Suitable for vegetarians
  • Low sugar healthy alternative to keep you fuller for longer
BUY NOW*
TOP 9
Image of BAREBELLS BA06 protein bar
Barebells Protein Bars | 20g protein low carb chocolate bars | after workout low calorie snacks 12 x 55g (Caramel Cashew)*
  • No GMO, No Palm oil
  • A gooey caramel core wrapped in sweet milk chocolate and cashew chunks. Eating healthy…
  • High protein bars with 20g protein per serving
BUY NOW*
TOP 10
Image of Snickers CC98B protein bar
Snickers Hi Protein Bar (12 x 55g) - High Protein Energy Snack with Caramel, Peanuts and Real Milk Chocolate - Contains 20g Protein*
  • Only 213 kcals per bar
  • Every case contains 12 individually wrapped bars perfect for a post workout snac…
  • Contains 56% less sugar than a standard Snickers 48g bar
BUY NOW*
Affiliate Disclosure

* We participate in the Amazon Associates Program. As an Amazon Associate we earn from qualifying purchases. For the list of the best protein bars, 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. It is not a protein bar test. Last Update: 2021/12/04.