Snack packers comparing protein
If you want a bar to carry to a Bonfire Night outing, compare the protein in one bar and check that its pack size suits what you plan to take.
Who is choosing these bars?
Shoppers with dietary requirements
Plant-based and gluten-free are separate requirements. TREK describes its bars as plant-based, while Nature Valley labels its Protein Salted Caramel Nut bar gluten free; check the exact flavour and pack for the requirement that matters to you.
Hosts sharing snacks
Keep the wrappers available when offering bars to a group. Recipes discussed here include ingredients such as peanuts, other nuts, soya and milk, and some include gluten-containing cereals.
What should you compare?
Start with the serving size on the exact bar, then compare the nutrition and ingredient details that matter for the people who will eat it.
| Priority | What to check | Your needs |
|---|---|---|
| Protein per bar | Read grams of protein alongside the labelled serving size. TREK states 15g per High Protein bar; Nature Valley Salted Caramel Nut and Eat Natural Salted Caramel each list 10.4g per 40g bar. The TREK figure describes its High Protein range, not every TREK flapjack. | I want to know what one bar provides, rather than compare product names or differently sized packs. |
| Other nutrition | Compare sugars, saturated fat and energy using the same per-bar basis. Action on Salt & Sugar classified 37% of 458 snack bars in its November 2025 product review as high in sugars under UK front-of-pack thresholds; that figure describes the reviewed products, not every bar. | If I am taking several snacks for an evening out, protein is not the only figure I want to read on the label. |
| Fibre | Read fibre per bar alongside protein and serving size. Nature Valley UK describes about 4g of fibre in its 40g Protein Salted Caramel Nut bar and about 6g in its Protein + Fibre Coconut & Almond bar. | I would compare both figures if fibre matters to my choice, without assuming that the bar with more fibre also has more protein. |
| Ingredients and allergens | Check each flavour’s ingredients and “may contain” statement. Nut-based bars can include peanuts, other nuts, soya or milk; the Nature Valley Protein + Fibre Coconut & Almond recipe also includes wheat and barley. | When sharing bars, I need a wrapper for each flavour so recipients can check it against their own requirements. |
What is easy to overlook?
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Assuming every “protein” bar provides the same amount
The stated amount changes between products and serving sizes. TREK states 15g for its High Protein range, while Nature Valley UK describes 7g in a Protein + Fibre Coconut & Almond bar.
Compare grams per individual bar on the exact flavour’s nutrition panel.
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Looking only at protein
A protein figure does not describe a bar’s sugars, saturated fat, energy or fibre.
Read those entries on the same per-bar basis before choosing a multipack.
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Sharing a multipack without checking every flavour
Ingredients differ between bars, and a “may contain” statement can matter to someone with an allergy.
Ask recipients about their requirements and keep each product’s wrapper available.
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Equating plant-based with other dietary requirements
A plant-based description does not establish whether a particular bar is gluten free or suitable for someone with an allergy.
Check each requirement separately against the exact pack’s ingredient and allergen information.
Which brands are relevant?
TREK
TREK distinguishes its High Protein bars from its Protein Flapjacks, a distinction worth keeping in mind when comparing products.
- TREK states that its High Protein range provides 15g of plant-based protein per bar.
- Check the exact flapjack or High Protein flavour’s nutrition and allergen details rather than applying a range-level figure to every bar.
Nature Valley
Its Protein Salted Caramel Nut and Protein + Fibre Coconut & Almond bars offer different protein and fibre amounts.
- Nature Valley UK describes around 10g protein and 4g fibre in a 40g Salted Caramel Nut bar, and 7g protein with around 6g fibre in a Protein + Fibre Coconut & Almond bar.
- Their ingredients differ; check the exact pack for nuts, soya, milk and gluten-containing cereals.
Eat Natural
Its Salted Caramel protein bar is a nut-based option for comparison.
- Eat Natural UK lists 10.4g protein and 2.2g fibre per 40g Salted Caramel bar.
- The listed ingredients include peanuts, soya and almonds; check the pack for its complete allergen statement.
Kellogg's
Special K Red Berry provides a useful reminder to compare individual bars rather than a familiar cereal-bar name.
- Kellogg's UK lists protein per 27g bar on the Special K Red Berry product information.
- At 1.4g protein per 27g bar, that product is not directly comparable to the named protein bars as a higher-protein choice.
Graze
Graze’s oat-based flapjacks may appeal if the flapjack format is what you are looking for.
- The Oat Boost range is presented as an oat-based flapjack option.
- Check protein per bar on a particular Graze product before treating it as an alternative to a named protein bar.
Alpen
Alpen is a cereal-bar reference, but the exact product matters when shopping for protein.
- Alpen’s product information can help identify the particular bar and its ingredients.
- Check a current product listing and nutrition panel rather than relying on an older Alpen Protein Bar name.
Joybuy bars to consider
These Joybuy options include nut-based protein bars and TREK protein flapjacks for the Bonfire Night snack scenario. Check each exact pack before choosing for a dietary requirement or sharing with others.
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Nature Valley Protein Salted Caramel Nut Bar, 4 x 40g
A four-bar pack to consider when taking individual snacks to a Bonfire Night outing. The Joybuy product information lists 10.4g protein per 40g serving and ingredients including peanuts, soya protein and whey solids; check the full pack label before sharing.
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Nature Valley Protein Peanut & Chocolate Cereal Bars, 8 x 40g
An eight-bar peanut-and-chocolate pack to consider when packing snacks for a group. Check the exact pack’s protein, other nutrition details and allergen statement before sharing.
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KIND Protein Dark Chocolate Nut Bars, 3 x 42g x 6pcs
A dark-chocolate nut-bar pack to compare if you prefer that recipe style for an outing. Confirm the pack arrangement, protein per bar and allergen information on the product details.
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Trek Salted Caramel Protein Flapjacks, 3 x 50g
A three-pack flapjack option if you want an oat-based bar for the outing. Do not apply TREK’s 15g High Protein range figure to this different product; check this flapjack’s own nutrition and allergen panel.
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Trek Cocoa Oat Protein Flap Jacks, 3x50g
A three-pack cocoa-and-oat flapjack option for carrying individual bars. Compare its own protein per bar and check the exact ingredients and allergen statement before sharing.
Common questions
Does “high protein” tell me everything about a cereal bar?
No. Read the protein amount and serving size, then check sugars, saturated fat, fibre and ingredients on the exact bar. A protein description alone does not answer those other buying questions.
Which named range states the most protein per bar here?
TREK states 15g of plant-based protein per bar for its High Protein range, compared with the 10.4g per 40g bar listed for the Nature Valley Salted Caramel Nut and Eat Natural Salted Caramel products. That comparison does not apply to every TREK flapjack or establish which bar suits your other requirements.
Are these bars automatically suitable for someone avoiding gluten?
No. Nature Valley labels its Protein Salted Caramel Nut bar gluten free, while its Protein + Fibre Coconut & Almond recipe includes wheat and barley. Check the exact product’s gluten statement and ingredients; a plant-based description is not a substitute.
What should I check before sharing bars on Bonfire Night?
Check the ingredients, declared allergens and “may contain” wording for every flavour, and keep the wrappers available. The bars discussed here include recipes with nuts, soya or milk, while some also contain gluten-containing cereals.