Who is choosing a bar?

The useful comparison depends on whether your coffee-break snack needs to be small, provide more protein or meet particular ingredient requirements.

Commuters watching snack calories

If you want something packaged to have with coffee, start with kcal for the complete bar. A smaller square and a full-size bar are different portions, even when both are sold as protein snacks.

Commuters seeking more protein

If protein quantity is the main reason for buying a bar, compare grams per complete bar alongside kcal. The cited Myprotein, Fulfil and Grenade examples show why choosing by calories alone can change what you get.

Buyers checking ingredients

If allergens or particular ingredients affect your choice, read the label for the exact flavour. GOV.UK guidance says that prepacked food containing any of the 14 specified allergens must identify them in the ingredients list.

What should you compare?

Choose the portion and protein amount you want from a coffee-break snack, then check the exact bar’s ingredients. A low-sugar description cannot stand in for its kcal figure.

Priority What to check Your needs
Whole-bar calories Compare kcal per complete bar and its weight, rather than relying on a per-100g figure or low-sugar wording. Myprotein UK lists 96 kcal per 30g Crispy Square; Tesco Groceries lists 186 kcal per 55g Fulfil Chocolate Brownie bar. I want a small snack with coffee, so the portion I will actually eat matters more than the wording on the front of the pack.
Protein per bar Check grams of protein for the same complete serving used in the kcal comparison. Myprotein UK lists 5.9g per Crispy Square, while Tesco Groceries lists 18.9g per Fulfil Chocolate Brownie bar and 23g per Grenade White Chocolate Cookie bar. If I am buying the bar specifically for its protein content, I need to decide whether a modest amount is enough or whether I want a larger bar.
Sugar and polyols Read sugars and polyols separately from kcal. Tesco Groceries lists 1.1g sugars and 17.8g polyols in the 55g Fulfil Chocolate Brownie bar, and 1.7g sugars and 16g polyols in the 60g Grenade White Chocolate Cookie bar. A low-sugar label catches my eye, but I still want to check the whole-bar nutrition and ingredients before buying a multipack.
Ingredients and allergens Check the ingredients and any precautionary statement for the exact flavour. GOV.UK says specified allergens in prepacked food must be identified in the ingredients list; the Tesco-listed Grenade White Chocolate Cookie bar also has a precautionary statement covering several allergens. When an ingredient or allergen affects what I can choose, a familiar brand name is not a substitute for reading this pack’s label.

What is easy to overlook?

  • Assuming low sugar means fewer calories

    Tesco Groceries lists 1.7g sugars but 215 kcal in a 60g Grenade White Chocolate Cookie bar. Sugar and kcal answer different questions.

    Compare kcal for the complete bar first, then check its protein and sugar figures against what you want from the snack.

  • Expecting a compact square to match a full-size bar’s protein

    Myprotein UK lists 5.9g protein in its 30g Crispy Square. Tesco Groceries lists 18.9g in a 55g Fulfil Chocolate Brownie bar, with a higher whole-bar kcal figure.

    Choose the smaller portion if that meets your purpose; if protein quantity drives the purchase, compare grams per bar before choosing.

  • Skipping the exact flavour’s label

    Ingredients and precautionary allergen statements matter to the choice. Barebells UK also states that excessive consumption of its White Salty Peanut bar may have a laxative effect.

    Read the ingredients, allergen statements and any polyol-related warning on the bar you intend to buy, particularly when switching flavours.

  • Using an overseas nutrition panel for a UK purchase

    Quest Nutrition lists nutrition figures for its S’Mores bar on a US product page. Those figures should not be treated as the UK label for a bar with the same name.

    For a UK purchase, compare the current UK pack and listing rather than transferring figures from an overseas page.

Brand references for this choice

These references concern particular bars or product lines, not every flavour a brand makes.

Myprotein

Myprotein UK lists its Crispy Square as a 30g snack with 96 kcal, 5.9g protein and 5.1g fibre.

  • A smaller portion to consider when whole-snack kcal is the first check.
  • Its 5.9g protein is less than the amount listed for the full-size Fulfil and Grenade examples.

FULFIL

Tesco Groceries lists the 55g Chocolate Brownie bar at 186 kcal, with 18.9g protein.

  • Provides a point of comparison when you want more protein than a compact square supplies.
  • The same Tesco listing gives 17.8g polyols per bar, so check that figure as well as sugars.

Grenade

Tesco Groceries lists the 60g Carb Killa White Chocolate Cookie bar at 215 kcal, with 23g protein.

  • Its listed protein amount helps illustrate the full-size-bar route.
  • The listing also gives 16g polyols and a precautionary statement covering several allergens. Figures for this flavour must not be transferred to another Grenade bar.

PhD

PhD lists 21g protein, 238 calories and 1g sugar for its featured Smart Bar.

  • An example to compare when protein quantity matters more than selecting the smallest snack.
  • Check the nutrition and ingredients for the particular Smart Bar flavour and variant you are considering.

Barebells

Barebells UK lists 20g protein per 55g White Salty Peanut bar.

  • A full-size example for comparing protein per bar.
  • Barebells UK includes an excessive-consumption laxative-effect warning for this product; check its ingredients and allergen information before choosing it.

Quest

Quest Nutrition’s US page lists 190 calories and 21g protein for its 60g S’Mores bar.

  • The named product gives a specific portion and protein figure to identify when checking a pack.
  • Use a current UK label for a UK buying decision; the US page does not establish the UK recipe or allergen declaration.

Tesco

Tesco is a retailer, not the maker of the Fulfil and Grenade bars cited here. Its product listings give per-bar nutrition for those specific flavours.

  • The listed serving sizes make it possible to compare those two bars on a whole-bar basis.
  • Check the current listing and pack for the exact flavour rather than applying one bar’s figures to another.

Joybuy protein bars for a coffee break

These Grenade multipacks are options to consider if you want to keep bars ready for a commuter coffee break. Check the nutrition and ingredients for each named flavour: the Myprotein, Fulfil and Grenade White Chocolate Cookie figures above describe different products.

Grenade Jaffa Quake protein bars, pack of twelve 60g bars

Grenade Jaffa Quake Protein Bars, 12 x 60g

The 60g bar size may suit a coffee break where you want a full-size portion. This is a 12-bar pack; check Jaffa Quake’s own per-bar kcal, protein, ingredients and polyol information rather than using figures for another Grenade flavour.

View on Joybuy
Grenade Soft Core Double Chocolate protein bars, pack of twelve 50g bars

Grenade Soft Core Double Chocolate, 12 x 50g

If a 50g bar is the portion you want with coffee, compare this flavour’s kcal and protein per bar with the other options. The pack contains twelve 50g bars; read its own ingredients and allergen statements before choosing it.

View on Joybuy
Grenade Soft Core Golden Caramel protein bars, pack of twelve 50g bars

Grenade Soft Core Golden Caramel, 12 x 50g

For a commuter coffee break, compare kcal and protein for one Golden Caramel bar, not for the whole multipack. This variant comes as twelve 50g bars; check its own ingredients if you are choosing between flavours.

View on Joybuy
Grenade Soft Core Peanut Butter protein bars, pack of twelve 50g bars

Grenade Soft Core Peanut Butter, 12 x 50g

This twelve-pack provides 50g bars to compare with the other Soft Core flavours for a coffee break. Read Peanut Butter’s exact ingredients and allergen statements, as well as its per-bar nutrition, before selecting it.

View on Joybuy
Grenade Oreo Flavour protein bars, pack of four 60g bars

Grenade Oreo Flavour Protein Bars, 4 x 60g

This is a four-pack of 60g bars for shoppers considering a full-size coffee-break snack. Compare Oreo Flavour’s own kcal and protein per bar with the smaller-format choices, and check its ingredients for the exact variant.

View on Joybuy

Common questions

Does low sugar mean a protein bar has fewer calories?

No. Check kcal for the whole bar separately from sugars. Tesco Groceries lists 1.7g sugars and 215 kcal in its 60g Grenade White Chocolate Cookie bar, so the sugar figure alone does not tell you how many calories the bar contains.

What if I want a small snack but still want some protein?

Myprotein UK lists its 30g Crispy Square at 96 kcal with 5.9g protein. If protein quantity matters more than keeping the portion small, compare that with full-size examples such as Tesco Groceries’ 55g Fulfil Chocolate Brownie bar, listed at 186 kcal and 18.9g protein.

Should I check allergens on each protein-bar flavour?

Yes, if an allergen affects your choice, check the exact pack’s ingredients and precautionary statement. GOV.UK guidance says prepacked food containing any of the 14 specified allergens must identify them in the ingredients list; one flavour’s label should not be used for another.

Why check polyols on a bar for the commute?

Polyol amounts and label warnings are useful to check if they matter to you. Tesco Groceries lists 17.8g polyols in its 55g Fulfil Chocolate Brownie bar and 16g in its 60g Grenade White Chocolate Cookie bar; Barebells UK gives an excessive-consumption laxative-effect warning for its White Salty Peanut bar. Read the statement on the exact product you choose.