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Buying Guide

Best Protein Bars UK 2026: Six Worth Buying, Ranked by Protein and Price

We compared 87 UK protein bars on protein per bar, price per 20g of protein and ingredients. Six worth buying in 2026, from 83p a bar.

Bernard, Founder of ProteinDeals

Bernard, Founder of ProteinDeals

Published 6 August 2026Updated 6 October 20266 min read
Best Protein Bars UK 2026: Six Worth Buying, Ranked by Protein and Price

Quick answer

For value, Myprotein's Layered Bar gives about 20g of protein from around 83p a bar on offer. For taste, the Myprotein Impact Protein Bar Cookies & Cream topped our his and her taste test at 4.38/5. Grenade Carb Killa is the pick for flavour range, MaxiNutrition Classic for the most protein in a small bar, Precision Engineered for vegan, and Myprotein x Hotel Chocolat if you want to avoid polyols and intense sweeteners.

01

How we chose

Protein bars compared
87With published ingredients
Protein in a typical bar
~20gMost picks are 18g to 22g
Top score in our taste test
4.38/5Impact Protein Bar Cookies & Cream

We compared the protein bars in the ProteinDeals catalogue on protein per bar, price per 20g of protein and the sweetener system on the label, then added the scores from our own taste tests, where he and she each rate every bar out of 5. A cheap bar with 10g of protein is not cheap protein, so price per 20g is the fairest price comparison.

Prices below were recorded on 4 October 2026 and change often, especially at clearance retailers. The bars comparison has the latest prices; this guide explains which bars are worth your shortlist.

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02

Six bars worth buying in 2026

Myprotein Layered Bar: best value. About 20g of protein in a 60g bar, from around 83p a bar in a 12-pack on offer, the lowest price per 20g of protein among the mainstream bars we compared. Prices vary by flavour: the Triple Chocolate Fudge we tested was £19.49 for 12 and scored 2.63/5 in our taste test, so pick your flavour carefully. Compare Layered Bar prices.

Grenade Carb Killa: best flavour range. Around 20g to 22g of protein per 60g bar across a wide range of flavours. The cheapest listings we found were at Nutricircle, which sells clearance and short-dated stock, so check the best-before date. Compare Grenade prices.

MaxiNutrition Classic High Protein Bar: most protein for its size. 20g of protein in a 40g bar, half its weight in protein. It costs more per bar than the Layered Bar but suits anyone who wants a smaller, denser bar. Compare MaxiNutrition prices.

Precision Engineered Plant Protein Bar: best vegan. About 22g of plant protein in a 65g bar at Holland & Barrett, the highest of the vegan bars we compared. The Protein Works' Ridiculous Vegan Protein Bar is a cheaper single-bar alternative with about 17g. Compare Plant Protein Bar prices.

Myprotein x Hotel Chocolat Layered Bar: fewest sweeteners. About 18g of protein, with no polyols or intense sweeteners on its ingredient list, which makes it the pick if other bars taste artificial to you. It costs roughly twice as much per bar as the standard Layered Bar. Compare prices.

Myprotein Impact Protein Bar: best-rated in our taste test. About 20g of protein in a 64g bar, at around £1.62 a bar in a 12-pack. The Cookies & Cream flavour scored 4.38/5 from our testers, the highest of any bar we have tried. Read the review or compare Impact Protein Bar prices.

Price per 20g of protein

Multipack price per bar, divided by protein per bar. Prices from the ProteinDeals catalogue, recorded on 4 October 2026, before delivery.

Myprotein Layered Bar£0.84

19.8g protein · £0.83 a bar

Grenade Carb Killa£1.23

21.6g protein · £1.33 a bar

Myprotein Impact Protein Bar£1.62

20g protein · £1.62 a bar

MaxiNutrition Classic High Protein Bar£1.62

20.0g protein · £1.62 a bar

Precision Engineered Plant Protein Bar£1.81

22.1g protein · £2.00 a bar

Myprotein x Hotel Chocolat Layered Bar£1.90

18.0g protein · £1.71 a bar

Grenade figures use Nutricircle clearance listings, where stock and best-before dates vary.

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03

Tried and rated: our his and her taste test

Price and protein only tell half the story, so we eat the bars too. In each first-hand review, he and she score the bar out of 5 on taste, texture, nutrition, value and satisfaction. Three bars have been through the test so far, all from Myprotein, ranked below by our score, the average of his and hers.

Our testers and Myprotein's customers disagree most on the wafer and the Layered Bar, which customers rate 4.8/5 and 4.6/5. Taste is personal, so treat both scores as a guide, and if a bar tastes artificial to you, this explainer covers why.

  1. Myprotein Impact Protein Bar Cookies and Cream in its wrapper

    #1 in our taste test · 4.38/5

    Myprotein Impact Protein Bar Cookies & Cream

    His overall
    4.25/5
    Her overall
    4.5/5

    His review

    4.25/5 overall

    The white-chocolate flavour is the main draw. It recalls the older Hershey's Cookies 'n' Creme flavour without becoming as sickly as the modern version, and the protein powder does not dominate the taste.

    Taste
    Texture
    Nutrition
    Value
    Satisfaction
    • +Soft and chewy rather than dry or jaw-tiring
    • +A balanced mix of flavour, chew and crisp texture
    • +Very good for a protein bar, although not equivalent to a conventional chocolate bar

    Her review

    4.5/5 overall

    The contrast in textures stands out most: a firm bar with a softer centre and small crispy pieces across the coating. It is her favourite protein bar tried so far.

    Taste
    Texture
    Nutrition
    Value
    Satisfaction
    • +Enjoys the white-chocolate coating
    • +Likes the chewy centre and crispy pieces together
    • +The texture hits a useful middle ground without being simply hard or crunchy
    Read the full review, photos and customer ratings →
  2. Myprotein Crispy Protein Wafer Peanut Butter in its wrapper

    #2 in our taste test · 2.63/5

    Myprotein Crispy Protein Wafer Peanut Butter

    His overall
    2.75/5
    Her overall
    2.5/5

    His review

    2.75/5 overall

    The sweet cream-and-wafer flavour is pleasant enough, but it does not deliver the peanut-butter taste promised on the wrapper. The wafer also feels drier and less cleanly crisp than stronger examples.

    Taste
    Texture
    Nutrition
    Value
    Satisfaction
    • +The light chocolate drizzle adds a welcome extra note
    • −The filling tastes closer to vanilla or sweet cream than peanut butter
    • −Dry and slightly cardboard-like rather than sharply crisp

    Her review

    2.5/5 overall

    The structure and dry, crispy style suit her preferences, and the generic flavour is enjoyable by itself. The score falls because she would not have identified it as peanut butter without reading the wrapper.

    Taste
    Texture
    Nutrition
    Value
    Satisfaction
    • +Likes the layered wafer structure and dry crunch
    • −Would rate the snack much higher if the flavour matched its label
    • −The peanut-butter character is too faint to recognise confidently
    Read the full review, photos and customer ratings →
  3. Myprotein Layered Bar Triple Chocolate in its wrapper

    #3 in our taste test · 2.63/5

    Myprotein Layered Bar Triple Chocolate Fudge

    His overall
    3.25/5
    Her overall
    2/5

    His review

    3.25/5 overall

    The thick chocolate centre gives it a satisfying, Boost-like structure, but the flavour never becomes as rich or complete as the Triple Chocolate name suggests. A powdery protein-bar character remains noticeable throughout.

    Taste
    Texture
    Nutrition
    Value
    Satisfaction
    • +Chocolatey enough to be enjoyable
    • +Likes the thick, filled structure
    • +The chewy texture works better than the flavour
    • −The chocolate flavour lacks the depth promised by the name
    • −A powdery protein-bar texture and taste remain obvious

    Her review

    2/5 overall

    The chocolate coating and chewy centre are pleasant, and the bar does taste recognisably chocolatey. The problem is the lingering protein-powder aftertaste, which makes it difficult to want another one despite liking the texture.

    Taste
    Texture
    Nutrition
    Value
    Satisfaction
    • +Likes the chocolate coating and chewy layered centre
    • +The basic chocolate flavour is not unpleasant
    • −A lingering protein-powder aftertaste spoils the finish
    • −Would not choose to come back to it
    Read the full review, photos and customer ratings →

Our testers against Myprotein's customers

Green is our score, the average of his and her ratings; grey is Myprotein's published customer average. Scores out of 5.

CustomersOur testers (his and her average)
Impact Protein Bar Cookies & CreamCustomers 4.46/54.38/5

His 4.25 · Her 4.5

Read our review →
Crispy Protein Wafer Peanut ButterCustomers 4.80/52.63/5

His 2.75 · Her 2.5

Read our review →
Layered Bar Triple Chocolate FudgeCustomers 4.60/52.63/5

His 3.25 · Her 2

Read our review →

Customer averages from Myprotein's product pages, shown on our review pages in October 2026.

04

The six bars side by side

Most protein bars use the same handful of sweeteners. If one tastes artificial to you, our guide to why protein bars taste artificial explains what to look for.

BarProtein per barPrice per barSweeteners on the label
Myprotein Layered Bar19.8g£0.83Maltitol, isomalt, sucralose
Grenade Carb Killa21.6g£1.33Maltitol, polydextrose, sucralose in most flavours
MaxiNutrition Classic High Protein Bar20.0g£1.62Maltitol, sucralose
Precision Engineered Plant Protein Bar22.1g£2.00Maltitol, stevia
Myprotein x Hotel Chocolat Layered Bar18.0g£1.71No polyols or intense sweeteners listed
Myprotein Impact Protein Bar20g£1.62Maltitol
Top-rated in our taste test
Impact Protein Bar

Impact Protein Bar

MyProtein · 12x64g

367Kcalper 100g
31gProteinper 100g
33gCarbsper 100g
14gFatper 100g

Pros

  • 57.1% cheaper per 25g protein than the median of 89 other Bars product families in this comparison

Cons

  • At 31% protein, a 25g protein portion supplies about 296 kcal, rather than the roughly 100 kcal supplied by the protein itself
£10.00£1.050/25g protein
View dealBuy on Amazon
Compare all protein bar
05

Is a protein bar worth it?

Gram for gram, protein bars are an expensive way to buy protein. Our catalogue's mainstream whey powders cost about £0.99 to £1.21 per 25g of protein, while even the best-value bar costs about 84p for 20g, and most cost well over £1.50. Bars earn their place on convenience, not price.

If you eat one most days, buying the box rather than single bars usually saves the most. The bars comparison shows multipack prices across retailers.

References

Sources and further reading

  1. 01
    ProteinDeals first-hand protein reviews

    His and her taste-test scores, with Myprotein customer averages, captured in September and October 2026.

  2. 02
    ProteinDeals bars comparison

    Live multipack and single-bar prices across UK retailers.

  3. 03
    ProteinDeals catalogue — protein bar prices and ingredients, recorded 4 October 2026

    Protein per bar calculated from protein per 100g and bar weight.

Frequently asked questions

Which protein bar tastes best?+

In our his and her taste test, the Myprotein Impact Protein Bar Cookies & Cream scored highest, at 4.38/5. Three bars have been tested so far, all from Myprotein.

What is the best value protein bar in the UK?+

In our October 2026 data, Myprotein's Layered Bar gave the lowest price per 20g of protein among mainstream bars, at around 83p a bar in a 12-pack with about 20g of protein.

How much protein should a protein bar have?+

Most full-size protein bars carry 18g to 22g. Bars with around 10g are better treated as snacks, and usually cost more per gram of protein.

Which protein bars do not use artificial sweeteners?+

Fewer than a third of the bars we checked used neither polyols nor intense sweeteners. The Myprotein x Hotel Chocolat Layered Bar is the highest-protein option among them, with about 18g.

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