For an office packed lunch, compare protein per whole bar first, then check fibre, sugars, energy and allergens on the exact pack. TREK states that its High Protein bars contain 15g plant-based protein per bar, while Nature Valley UK lists 10.4g for its 40g Salted Caramel Nut bar; the right choice also depends on the ingredients and portion that suit you.
If one bar is going into your lunch bag or desk drawer, its whole-bar protein figure matters more than the word “protein” on the wrapper. TREK states 15g per High Protein bar; Nature Valley UK lists 10.4g for its 40g Salted Caramel Nut bar.
Check the claim on the particular bar you plan to pack. TREK says its bars are plant-based; Nature Valley UK describes its Salted Caramel Nut bar as gluten free and vegetarian, but its ingredients include milk.
The exact flavour’s ingredient list is a decision point. The Nature Valley, Eat Natural and Nakd bars described here contain nuts, with soya or milk appearing in ingredients or possible-allergen information depending on the product.
Start with the portion you will actually pack, then compare its nutrition and ingredients against your requirements.
| Priority | What to check | Your needs |
|---|---|---|
| Protein per bar | Read the grams for one whole bar and its serving size. Check the exact product rather than treating every protein-labelled bar as equivalent. | I want to know how much protein the single bar in my packed lunch provides. |
| Other nutrition | Compare fibre, sugars, energy and saturated fat for the same per-bar portion. A protein or fibre claim does not tell you those figures. | If I pack a bar regularly, I want its other nutrition figures to fit the rest of my lunch. |
| Ingredients and allergens | Check the exact flavour’s ingredients, emphasised allergens and any “may contain” statement. Confirm dietary claims on that pack. | I need to avoid particular ingredients, so a plant-based or gluten-free description alone cannot settle my allergen check. |
| Packed-lunch portion | Check the size of an individual bar and, for a multipack, whether its flavours have different labels. | A single portion is convenient to carry, but I still need to know what is in the bar I take to work. |
Protein figures differ across the named bars: Nature Valley UK lists 10.4g for its Salted Caramel Nut bar, Eat Natural UK lists 7.8g for Dark Chocolate & Peanut, and Body&Fit lists 7.7g for a 45g Nakd Protein Bar.
Compare protein for the whole bar, then read the other per-bar nutrition figures.
In its 2025 UK supermarket snack-bar analysis, Action on Sugar reported that 37% of the bars surveyed would be rated high in sugars under voluntary traffic-light labelling. A protein claim does not establish a bar’s sugar or saturated-fat figure.
Read sugars, energy and saturated fat for the portion on the exact pack.
The Nature Valley Salted Caramel Nut bar lists peanuts, almonds, soya and milk. Eat Natural’s Dark Chocolate & Peanut bar lists peanuts and soya, with possible milk and tree nuts.
If you avoid an allergen, check both the ingredient list and “may contain” wording on the bar you will eat.
Ingredients, allergens and nutrition can differ between recipes, so one flavour’s details cannot stand in for another’s.
Check each flavour before adding a mixed pack to your regular office lunches.
These brand references describe particular lines or products, not every bar sold under each name.
TREK distinguishes its High Protein bars from its Protein Flapjacks.
Its Protein range includes the 40g Salted Caramel Nut bar.
A nut-led option represented here by the Dark Chocolate & Peanut Protein Bar.
A fruit-and-nut format for shoppers considering protein alongside other per-bar nutrition figures.
The Cocoa Vanilla Oat Boost is an oat-flapjack option to assess by its own label, rather than by protein-bar branding.
For an Alpen bar, the particular recipe matters more than the brand name when comparing protein.
These bar multipacks are options for packing individual office snacks. Compare the exact flavour’s nutrition and allergens before choosing between them.
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The 50g bars provide individually sized portions for a packed lunch. Check the pack’s protein and sugar figures; its product information flags milk and soya allergens.
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This peanut-butter flavour comes as 50g bars for packing separately. Its product information flags peanuts, milk and soya; check the exact wrapper if you avoid any of them.
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Each bar is 60g, so compare its whole-bar nutrition with smaller portions rather than relying on the product name. Its product information flags milk, soya and wheat gluten.
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The four-pack contains 40g bars for separate lunches. Check this Peanut & Chocolate flavour’s own protein and fibre figures; its product information flags peanuts, soya and milk.
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For this 40g flavour, Nature Valley UK lists 10.4g protein per bar. Its ingredients include peanuts, almonds, soya and milk; check the pack’s full nutrition and allergen declaration before adding it to a regular lunch.
Check the ingredient list, emphasised allergens and any “may contain” statement on the exact pack. GOV.UK guidance for pre-packed food describes allergens emphasised within the ingredients list; the named bars here differ in their nut, soya and milk information.
No: check protein per bar separately. Tesco describes Graze Cocoa Vanilla Oat Boost as high in fibre and lists 2.7g sugars per 30g serving, while Nature Valley UK and TREK provide explicit protein figures for the bars or line discussed here.
Do not decide that from the protein wording alone. The named bars have different portion sizes and per-bar nutrition, so compare the bar’s full label with what else you plan to pack.