Calorie-conscious protein snackers
If you want a portable snack that contributes protein, compare the grams of protein and kcal in the bar you will actually eat. The word “protein” on its own does not tell you either amount.
Who is this choice for?
Plant-based snack buyers
Dietary suitability depends on the exact product. Tesco Groceries labels the 44 g TREK Choc Caramel bar suitable for vegans and its listed Nature Valley Peanut & Chocolate bar suitable for vegetarians. Check ingredients and allergens separately.
People checking peanut, nut or soya exposure
Ingredients and precautionary allergen statements can decide whether a bar is suitable for you. The Food Standards Agency explains that a “may contain” statement indicates possible unintended allergen presence; it is different from an ingredient deliberately used in the bar.
What should you compare?
Start with the nutrition declaration for one bar, then check whether its size, ingredients and dietary labelling suit you.
| Priority | What to check | Your needs |
|---|---|---|
| Protein and kcal | Read protein in grams and energy in kcal for the same bar. Compare bar weights as well as the figures; per 100 g values can help when serving sizes differ. | I want to know how much protein one snack contributes without overlooking its kcal. |
| Protein claims | Look past the front-of-pack claim to the nutrition declaration. A protein claim does not give the kcal per bar. | A bar labelled for protein still needs to fit the serving size and energy amount I have in mind. |
| Exact variant | Match the flavour, bar weight and current pack. Tesco Groceries lists 12 g protein and 159 kcal for a 44 g TREK Choc Caramel bar; Ocado lists 15 g and 197 kcal for a 55 g version. | If I switch pack sizes, I want to compare the nutrition of the version I am buying. |
| Ingredients and allergens | Read the current ingredients, emphasised allergens and any “may contain” statement. Check vegan, vegetarian or gluten-free labelling on the specific product. | Peanuts, other nuts, soya, milk or gluten-containing cereals may affect which bar I can choose. |
Common buying mistakes
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Treating a protein claim as a calorie figure
A protein claim and the kcal in a whole bar answer different questions. The claim alone cannot tell you how much energy your snack provides.
Read protein and kcal together for the same serving before comparing bars.
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Mixing up bar sizes
The 44 g TREK Choc Caramel bar listed by Tesco Groceries and the 55 g version listed by Ocado have different per-bar protein and kcal figures.
Check the weight and nutrition declaration on the exact flavour and pack you intend to buy.
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Using a dietary label as an allergen check
Vegan, vegetarian and gluten-free labels do not replace a review of ingredients and precautionary statements. For example, Tesco Groceries lists soya and peanuts in the 44 g TREK bar.
Read the current pack’s ingredient and allergen information, particularly if a recipe or packaging has changed.
Brand references
These examples show why the exact bar matters more than the brand name: protein, kcal and dietary labelling can differ between products and sizes.
TREK
TREK has plant-based protein bars, including Choc Caramel listings in more than one bar size.
- Tesco Groceries lists 12 g protein, 159 kcal and 12 g fibre for the 44 g Choc Caramel bar, which it labels suitable for vegans.
- That listing includes soya and peanuts. Ocado’s 55 g Choc Caramel listing has different per-bar nutrition, so check which size you have.
Nature Valley
Its Peanut & Chocolate protein cereal bar offers a 40 g point of comparison.
- Tesco Groceries lists 10 g protein and 196 kcal per 40 g bar, and labels it gluten free and suitable for vegetarians.
- Check the current nut and other allergen information before choosing this variant.
Eat Natural
Its Peanuts, Almonds & Salted Caramel protein bar is a nut-based 40 g option.
- Tesco Groceries lists 10.4 g protein, 198 kcal and 7.9 g sugars per bar.
- The listed ingredients include peanuts, almonds, soya and milk-derived ingredients.
Graze
Graze offers snacks and flapjacks; choose a specific pack before comparing it with a protein cereal bar.
- Read protein and kcal per bar on the product you are considering rather than applying a range-wide description to an individual snack.
Kellogg’s
Kellogg’s describes Special K Protein Cereal Bars made with ingredients including soya and seeds.
- Use the current UK pack’s per-bar protein and kcal figures for a direct comparison with other bars.
Alpen
An Alpen product list from November 2021 names Chocolate and Berries protein bars.
- Check the current product and its nutrition declaration; a historical list does not establish today’s formulation or availability.
Protein-bar options on Joybuy
These Grenade products are protein bars to consider alongside cereal bars for a portable snack. Compare protein and kcal on each current pack before treating either format as a match for your plans.
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Grenade Soft Core Double Chocolate Protein Bars, 12 × 50 g
For a portable protein-bar alternative, compare the current pack’s protein and kcal per 50 g bar. Check its milk and soya allergen information.
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Grenade Soft Core Golden Caramel Protein Bars, 12 × 50 g
This 50 g bar is another flavour to compare on a per-bar basis. Review the current milk and soya allergen declaration; it is not a vegan or vegetarian option.
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Grenade Soft Core Peanut Butter Protein Bars, 12 × 50 g
Compare protein and kcal for one 50 g bar, not the 12-bar pack. Its peanut, milk and soya allergen information is particularly important to check.
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Grenade High Protein Low Sugar Oreo Flavour Protein Bars, 4 × 60 g
The 60 g bar is a different serving size from the 50 g options, so compare both kcal and protein per bar. Check the milk, gluten and soya allergen information on the pack.
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Grenade High Protein Low Sugar White Chocolate Salted Peanut Flavour Protein Bars, 12 × 60 g
Use the nutrition declaration for one 60 g bar when comparing it with smaller snacks. Check its peanut, milk and soya allergen information.
Questions about cereal bars
Does “high protein” mean a cereal bar is low in calories?
No. A protein claim does not tell you the kcal in a bar. Check energy and protein on the nutrition declaration for the same serving size.
How do the listed cereal bars compare for protein and kcal?
For the exact products in Tesco Groceries’ listings, the 44 g TREK Choc Caramel bar provides 12 g protein and 159 kcal; the 40 g Nature Valley Peanut & Chocolate bar provides 10 g and 196 kcal; and the 40 g Eat Natural Peanuts, Almonds & Salted Caramel bar provides 10.4 g and 198 kcal. These figures compare protein and energy, not flavour or allergen suitability.
Why check the TREK Choc Caramel bar weight?
The 44 g version listed by Tesco Groceries has 12 g protein and 159 kcal, while the 55 g version listed by Ocado has 15 g protein and 197 kcal. Use the figures for the size you are buying.
Can a vegan or vegetarian label replace an allergen check?
No. Tesco Groceries labels the 44 g TREK Choc Caramel bar suitable for vegans, but its listed ingredients include soya and peanuts. Read the current ingredient list and any precautionary allergen statement for the exact product.