Who needs to check what?

Travellers comparing fat content

If lower fat is the deciding factor for your train snack, compare the same flavour’s figures per 100g and per bar. A low-sugar description does not tell you its fat content.

Commuters choosing a protein portion

If you want protein in a bar you can carry, check the amount per bar alongside its serving weight. Myprotein UK lists 15g protein in the 40g Lean Layered White Chocolate & Raspberry bar, while Barebells UK lists 20g in its 55g Hazelnut Nougat bar.

Travellers checking dietary suitability

Read the ingredients and precautionary allergen wording for the exact flavour before departure. Barebells UK lists milk, hazelnuts and soya in Hazelnut Nougat, with a warning that it may contain gluten, peanuts and other nuts.

What matters when comparing bars?

Start with comparable fat figures, then assess the portion, ingredients and pack format you would actually take on the train.

Priority What to check Your needs
Fat content Compare fat per 100g across flavours and bar sizes. Then check fat per bar for the portion you plan to eat. I want a lower-fat choice based on the nutrition panel, rather than assuming that a low-sugar or high-protein bar is also lower in fat.
Protein and portion Read protein per bar and its serving weight together. Compare sugar and energy values on the same portion basis if those figures matter to you. For a long journey, I want to know what one bar provides, not just the protein figure printed prominently on the pack.
Ingredients Check the exact flavour’s ingredients, declared allergens and any “may contain” statement. Read its sweetener and polyol information where relevant. I need a bar that fits my ingredient requirements, especially if finding another snack during the journey would be inconvenient.
Pack format Confirm the number and weight of bars in the pack. Check the individual wrapper and storage instructions for the product you intend to carry. I would rather know how many bars I am buying and whether the format works for the journey before setting off.

What is easy to overlook?

  • Comparing only the fat in one bar

    A smaller bar can have less fat per portion even when its fat figure per 100g is similar to, or higher than, another bar’s.

    Use per 100g figures for a like-for-like comparison, then use per-bar figures to assess the portion you would eat.

  • Choosing by protein or sugar alone

    Joybuy UK lists 21g protein, 1.3g sugar and 9.3g fat per 60g bar for Grenade Carb Killa Chocolate Chip Salted Caramel. Myprotein UK lists 15g protein and 3.4g fat per 40g bar for Lean Layered White Chocolate & Raspberry. The figures describe different products and portion sizes.

    Decide whether fat, protein or sugar matters most to you, and compare the full nutrition panels rather than one front-of-pack figure.

  • Leaving ingredient checks until boarding

    The Grenade Chocolate Chip Salted Caramel listing on Joybuy UK reports 18g polyols per bar. Barebells UK lists milk, hazelnuts and soya in Hazelnut Nougat, as well as precautionary allergen wording.

    Read the exact flavour’s ingredient list, allergen statements and any manufacturer guidance about sweeteners before choosing what to take.

Which brand ranges are relevant?

These brand and retailer references help identify what to compare; their ranges do not all have the same fat content.

Myprotein

Its Lean Layered range includes a flavour with stated fat figures useful for this decision.

  • Myprotein UK lists White Chocolate & Raspberry at 8.6g fat per 100g and 3.4g per 40g bar.
  • Myprotein states that this product is not suitable for vegetarians and contains sweeteners. Check the label for the flavour you choose.

Grenade

Compare its individual flavours when protein and sugar figures matter as well as fat.

  • Joybuy UK lists 21g protein and 1.3g sugar per 60g Carb Killa Chocolate Chip Salted Caramel bar.
  • The same listing gives 9.3g fat per bar and 16g per 100g, and includes milk and soya ingredients.

PhD

Smart Bar is a range to assess if its stated protein and sugar figures suit your snack choice.

  • PhD describes Smart Bar as providing 20g protein and less than 2.5g sugar per bar.
  • To compare it for a lower-fat choice, check the fat and allergen figures on the exact variant’s pack.

Barebells

Its Hazelnut Nougat bar provides a useful comparison where protein, fat and nut ingredients all affect the choice.

  • Barebells UK lists 20g protein in a 55g Hazelnut Nougat bar.
  • That flavour lists 8.8g fat per bar and 16g per 100g; it contains milk, hazelnuts and soya.

Tesco

Its protein-bar category is a way to browse different brands and pack formats before travelling.

  • Tesco Groceries lists protein bars from several brands, including Grenade.
  • Check each flavour’s nutrition panel and the current collection or delivery options; a category listing does not establish its fat content.

Protein bars on Joybuy

These Joybuy options include several Grenade flavours and a Nature Valley peanut-and-chocolate bar. Their pack details help with planning a journey; compare each exact flavour’s nutrition panel if lower fat is your priority.

Grenade Soft Core Double Chocolate protein bars, pack of 12

Grenade Soft Core Double Chocolate, 12 × 50g

A Double Chocolate option for a train snack. The pack contains 12 × 50g bars; compare the exact flavour’s fat per 100g and per bar before choosing it for a lower-fat preference.

View on Joybuy
Grenade Soft Core Golden Caramel protein bars, pack of 12

Grenade Soft Core Golden Caramel, 12 × 50g

A Golden Caramel variant in a pack of 12 × 50g bars. If you are comparing it with another flavour for a journey, check both nutrition panels rather than assuming they have identical values.

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

Grenade High Protein Low Sugar Oreo Flavour, 4 × 60g

The title identifies a four-bar pack with 60g bars. Check its fat per 100g and per bar if lower fat matters more to you than the protein and sugar wording in the product name.

View on Joybuy
Grenade Soft Core Peanut Butter protein bars, pack of 12

Grenade Soft Core Peanut Butter, 12 × 50g

A Peanut Butter variant in a pack of 12 × 50g bars. Check the exact pack’s allergen statement as well as its fat figures before taking it on a train journey.

View on Joybuy
Nature Valley Protein Peanut and Chocolate bars, pack of four

Nature Valley Protein Peanut & Chocolate, 4 × 40g

A four-bar pack with 40g bars. To compare it with the larger Grenade bars for a journey, use fat per 100g first, then check the fat per bar and the ingredient list.

View on Joybuy

Questions about choosing a bar

Should I compare fat per bar or per 100g?

Use both: per 100g lets you compare different bar sizes, while per bar shows the amount in the portion you would eat. Myprotein UK lists 8.6g fat per 100g and 3.4g per 40g bar for Lean Layered White Chocolate & Raspberry; Barebells UK lists 16g per 100g and 8.8g per 55g bar for Hazelnut Nougat.

Are low-sugar protein bars also lower in fat?

Not necessarily. Joybuy UK lists 1.3g sugar but 9.3g fat per 60g bar for Grenade Carb Killa Chocolate Chip Salted Caramel. Check the fat figure on the exact product rather than using its sugar description as a substitute.

What should I check if ingredients or allergens matter to me?

Read the exact flavour’s ingredient list, declared allergens and precautionary wording before travelling. Barebells UK states that Hazelnut Nougat contains milk, hazelnuts and soya and may contain gluten, peanuts and other nuts. Also check sweetener and polyol information if it affects your choice.