Choose a dedicated nut-based protein bar if protein per snack is your main priority: Ocado’s M&S listing gives 20.5g per 55g peanut butter protein bar, compared with 7.7g per 30g M&S nut-and-oat bar and 6.3g per 25g portion of Tesco Roasted Nut Mix. Those are different-sized servings, and none is automatically complete marathon fuel; check carbohydrate, ingredients and how the snack fits around your training.
A portable protein-containing snack may be convenient after a run, but its protein figure alone does not describe the rest of the meal. UK Sports Institute guidance considers food before and after training as part of fuelling sessions and recovery.
A measured nut mix lets you compare protein, fat and salt for the portion you intend to eat. Check the ingredients and allergen statements on the current pack, particularly if you avoid specific nuts.
A protein bar and a nut-and-oat bar are both compact, but their protein and carbohydrate amounts can differ. Compare the figures per bar rather than assuming the formats serve the same purpose.
Start with the serving you will actually eat, then consider when you plan to have it and whether its ingredients suit you.
| Priority | What to check | Your needs |
|---|---|---|
| Protein per portion | Compare grams per bar or measured portion, not just per 100g. Ocado lists 20.5g per 55g M&S protein bar and 7.7g per 30g M&S nut-and-oat bar; Tesco lists 6.3g per 25g Roasted Nut Mix portion. | I want to know how much protein the snack I will eat provides, without treating different-sized bars and nut portions as identical. |
| Training context | Read carbohydrate alongside protein per serving. Ocado lists 15.5g carbohydrate in the 55g M&S protein bar and 11.1g in the 30g M&S nut-and-oat bar. Consider the snack alongside other food planned around the session. | For this run, am I choosing an everyday snack, food after training or something to eat nearer the session? A high-protein label does not answer that question for me. |
| Ingredients and tolerance | Check the current pack for declared allergens, may-contain statements and sweeteners. The M&S protein bar listing warns that excessive consumption may produce laxative effects; Tesco lists 0.38g salt per 25g Roasted Nut Mix portion. | Before a key run, I would rather use a familiar snack and check that its ingredients fit my requirements. |
Ocado lists 20.5g protein but 15.5g carbohydrate in one 55g M&S peanut butter protein bar. The protein figure cannot, by itself, tell you whether that bar meets the food needs of a particular session.
Check both figures per bar and consider what else you plan to eat. UK Sports Institute guidance places training food within a varied diet that addresses fuelling as well as recovery.
Tesco lists 25.1g protein per 100g for its Roasted Nut Mix, but 6.3g for the labelled 25g portion.
Compare the protein, carbohydrate, fat and salt in the amount you expect to eat. If you serve loose nuts, measure your portion before using the per-100g label.
Ocado’s M&S protein-bar listing includes a manufacturer warning that excessive consumption may produce laxative effects.
Read the warning and try unfamiliar snacks during ordinary training rather than making a key session or race your first trial.
Nut-based products can contain peanuts, tree nuts and other declared allergens. Cambridge University Hospitals NHS Foundation Trust advises checking the label each time because recipes can change.
Read the current pack’s ingredients and may-contain statements against your own allergen requirements.
These examples illustrate formats and label details to compare; they do not imply that the products appear in the Joybuy selection below.
Ocado listings provide serving-level information for M&S peanut butter protein bars, nut-and-oat bars and a nut mix.
Tesco lists own-label whole-nut snacks, including roasted and unsalted mixes.
Tesco’s nuts listing includes KP dry-roasted and salted peanuts, as well as dry-roasted 30g snack packs.
These bars cover peanut, mixed-nut and nut-and-oat formats for portable snacking. Compare their current per-bar nutrition labels before choosing one for a particular training session.
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A peanut-and-chocolate bar format for a portable snack. The pack contains three 40g bars; check the current label for protein and carbohydrate per bar.
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A peanut-and-chocolate bar option when a portioned snack is convenient. Each bar is 40g; use its own label to compare protein, carbohydrate and allergens.
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A salted-caramel nut bar in four 40g portions. Check protein and salt per bar on the current pack if either figure matters to your choice.
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A dark-chocolate nut bar format in three 42g portions. Compare the current per-bar nutrition and ingredient label with other bar formats.
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A nut-and-oat bar format rather than a product identified as a protein bar. The multipack is 150g; check the individual bar’s serving size and nutrition before comparing it with the protein bars.
No single nut snack can be assumed to cover every training session’s food needs. UK Sports Institute guidance describes nutrition around training as addressing both fuelling and recovery within a varied diet. Check protein and carbohydrate per serving, then consider the snack alongside the rest of what you plan to eat.
Choose by the portion and the rest of your food plans, rather than the format alone. Ocado lists 20.5g protein per 55g M&S peanut butter protein bar, while Tesco lists 6.3g per 25g Roasted Nut Mix portion. The servings differ in size, and neither figure establishes what will suit every runner.
Yes, particularly when an ingredient or allergen matters to you. Cambridge University Hospitals NHS Foundation Trust advises reading the label on every purchase because manufacturers can change recipes; use the current pack rather than relying on an older listing.
Do not assume a nut-based bar or mix is suitable. Peanuts and tree nuts are common allergic foods according to the NHS, and individual products may contain them or carry may-contain statements. Check the current label against the advice you have been given for your diagnosed allergy.