Office and home workers
An individually wrapped bar is easy to keep for a mid-morning break. Compare the protein and nutrition figures for the bar you would actually eat, rather than judging it by the front-of-pack claim.
Who might choose a protein bar for elevenses?
People looking for a plant-based option
TREK states that its bars are plant-based, but protein amounts differ by product: TREK describes its Protein Flapjacks as providing 9g per bar, while Tesco lists 12g per 44g bar for High Protein Choc Caramel. Check the exact flavour and its allergen statement.
Shoppers checking gluten and allergens
A gluten-free label does not answer a question about peanuts, milk or soya. Nature Valley's Protein Peanut & Chocolate bar is listed as gluten-free, but its Joybuy ingredients and allergen information identify peanuts, soya and milk.
What should you compare on the pack?
Start with the figures for one bar, then use the per 100g panel when you need to compare differently sized products on the same basis.
| Priority | What to check | Your needs |
|---|---|---|
| Protein per bar | Read grams of protein for the individual bar and note its weight. Check the exact flavour: Tesco lists 12g for a 44g TREK High Protein Choc Caramel bar, while Waitrose lists 9g for a 35g Kellogg's High Protein Almond & Salted Caramel bar. | If protein is my main reason for buying a bar, I want to know the amount in the portion I will eat, not just whether the pack carries a protein claim. |
| Other nutrition | Compare sugars, saturated fat and energy per bar alongside protein. Use per 100g figures for a like-for-like comparison of differently sized bars. | I want the rest of the nutrition panel to make sense for a regular mid-morning snack, not to choose on protein alone. |
| Fibre and format | Check fibre for the exact variant and whether the pack contains individually wrapped portions. Nature Valley UK lists 4g fibre for its Protein Peanut & Chocolate bar; Tesco lists 12g per 44g TREK High Protein Choc Caramel bar. | A bar I can take to work matters to me, and I would compare its stated fibre figure with the other options on my shortlist. |
| Label comparison | Read the serving size and nutrition table; where traffic-light labelling appears, check which figures its colours refer to. | I use traffic-light labels when comparing food packs. In a Food Standards Agency and Ipsos survey of 611 people interviewed in Northern Ireland between 16 September and 23 November 2024, 49% said they actively used traffic-light labelling when shopping for food. |
| Allergens | Read the current ingredients, emphasised allergens and any “may contain” statement. Check these separately from vegan or gluten-free wording. | If I need to avoid a particular ingredient, the allergen information on the exact bar takes precedence over a broader dietary description. |
Common mistakes when comparing bars
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Assuming a protein claim tells the whole nutrition story
Action on Salt and Sugar's 2025 review of 458 snack bars from 10 major UK retailers found that 53% carried a protein claim. Under voluntary traffic-light criteria, 37% of the bars would be high in sugars and 55% high in saturated fat. These are product findings, not figures for shoppers' preferences.
Compare protein, sugars, saturated fat and energy for the portion on the pack before deciding which bar to buy regularly.
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Comparing only the per 100g protein figure
Bar sizes differ: Tesco lists 12g protein in a 44g TREK High Protein Choc Caramel bar, while Waitrose lists 9g in a 35g Kellogg's High Protein Almond & Salted Caramel bar. A per 100g figure answers a different question from the amount in one bar.
Use per-bar figures for the portion you plan to eat, then use per 100g values when comparing products on a common weight basis.
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Taking gluten-free or plant-based to mean allergen-free
Joybuy's listing for Nature Valley Protein Peanut & Chocolate identifies peanuts, soya and milk. Morrisons lists peanuts, almonds, milk and soya in Eat Natural Protein-Packed Salted Caramel & Nuts.
Check the current pack's ingredients, emphasised allergens and precautionary wording for the ingredients you need to avoid.
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Using an old range list to choose an exact bar
An Alpen product list dated November 2021 names Protein Bars, but an older range name does not establish the nutrition or pack details of a bar being considered now.
Check a current listing and the exact flavour's pack before comparing it with another elevenses option.
Brand ranges worth distinguishing
These brand references help distinguish bar formats and claims; compare the exact products rather than applying a range description to every flavour.
TREK
TREK sells plant-based Protein Flapjacks and High Protein bars.
- TREK states that its Protein Flapjacks provide 9g plant protein per bar.
- Protein differs across the range: Tesco lists 12g per 44g High Protein Choc Caramel bar. Check the exact flavour and its allergen warnings.
Nature Valley
Nature Valley UK lists gluten-free Protein bars in peanut, caramel-nut and chocolate-and-coffee flavours.
- The brand lists 10g protein and 4g fibre for these Protein variants.
- The Joybuy-listed Peanut & Chocolate bar identifies peanuts, soya and milk as allergens.
Eat Natural
Eat Natural's UK Protein Fruit & Nut range includes several peanut-led flavours.
- Morrisons describes the Salted Caramel & Nuts multipack as individually wrapped and a source of protein and fibre.
- That variant contains peanuts, almonds, milk and soya; use its own nutrition panel for a protein-per-bar comparison.
Kellogg's
Kellogg's High Protein Almond & Salted Caramel is a 35g nut-and-chocolate cereal bar.
- Waitrose lists 9g protein and 173kcal per bar.
- Its listed ingredients include peanuts, milk, soya, almonds, cashews and hazelnuts.
Graze
Graze offers oat flapjacks and other snacks for a mid-morning break.
- Graze states that its Oat Boost flapjacks are made with wholegrain oats.
- Check protein grams on the exact bar before comparing it with a protein-labelled cereal bar.
Alpen
Alpen is a muesli-led brand whose November 2021 product list also named Protein Bars.
- The older list identifies Chocolate and Berries Protein Bar variants.
- Use a current exact-product listing and nutrition panel before adding either variant to a protein-per-bar comparison.
Joybuy cereal bars for elevenses
These options include nut-based protein bars and TREK oat flapjacks for a portable elevenses. Compare each exact pack's nutrition and allergens against the features that matter to you.
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Nature Valley Protein Salted Caramel Nut, 4 x 40g
A nut-based bar to consider if you want an individually portioned elevenses. Nature Valley UK lists 10g protein and 4g fibre for this Protein variant; check the exact pack if you need to avoid peanuts, soya, milk or almonds.
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KIND Protein Dark Chocolate Nut Bars, 3 x 42g x 6pcs
A dark-chocolate-and-nut bar option for elevenses. The product information identifies peanuts, almonds and soya; check the exact pack for its nutrition figures and any milk or other-nut warnings.
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Nature Valley Protein Peanut & Chocolate, 4 x 40g
A gluten-free peanut-and-chocolate option if its allergens suit you. Nature Valley UK lists 10g protein and 4g fibre per Protein Peanut & Chocolate bar; the Joybuy listing identifies peanuts, soya and milk and warns that it may contain nuts.
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TREK Cocoa Oat Protein Flapjacks, 3 x 50g
An oat-flapjack format for a portable elevenses. TREK states that its Protein Flapjacks are plant-based and provide 9g protein per bar; check the Cocoa Oat pack's nutrition and soya information before choosing it.
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TREK Salted Caramel Protein Flapjacks, 3 x 50g
A salted-caramel oat flapjack to compare with nut-based bars. TREK describes its Protein Flapjacks as plant-based with 9g protein per bar; read this variant's nutrition panel and soya information on the current pack.
Questions about choosing a bar
Does a protein claim tell me how much is in one bar?
No. Read the grams of protein for the individual serving on the exact pack. A protein claim does not tell you its sugars, saturated fat, energy or fibre figures either, so compare those alongside it.
Can a protein bar replace variety in my mid-morning snacks?
A bar is one snack option, not a substitute for considering the rest of what you eat. The NHS Eatwell Guide describes dietary balance over a day or week rather than judging it by a single eating occasion.
Should I check allergens when buying a familiar bar?
Yes. Check the current pack's ingredients, emphasised allergens and any precautionary statement, even if you have bought the flavour before. Tesco cautions that food products, including the listed TREK High Protein Choc Caramel bar, can be reformulated.
Does gluten-free mean a bar is suitable for a peanut allergy?
No. Gluten-free describes a different consideration: Nature Valley's Protein Peanut & Chocolate bar is listed as gluten-free but contains peanuts, soya and milk. Check the exact product's current allergen information against the ingredients you need to avoid.