Late-night snack shoppers comparing protein
If you want a bar after dinner, compare protein and nutrition values for one complete bar. Per-100g figures alone do not describe the portion you would eat.
Who is this choice for?
The useful comparison changes with the portion you want and any dietary requirements you need the exact bar to meet.
Vegan or dairy-free flapjack shoppers
A flapjack may offer the format you prefer, but check the exact variant’s dietary labelling, portion size and sugars. TREK Original Oat is listed as vegan by Myprotein UK; that does not establish the ingredients of other TREK flavours.
Gluten-free shoppers checking allergens
Check gluten-free labelling on the particular bar, then read its separate ingredient and allergen statements. Nature Valley’s Peanut & Chocolate bar, for example, is described as gluten-free but lists peanuts, soya and milk as allergens on Joybuy UK.
What should you check?
Start with the whole-bar serving, then check whether its nutrition and ingredients suit the snack you intend to have.
| Priority | What to check | Your needs |
|---|---|---|
| Protein per bar | Compare grams per complete bar and the bar’s weight. Nature Valley UK lists around 10g in a 40g Peanut & Chocolate bar; Myprotein UK lists 10.2g in a 50g TREK Original Oat flapjack. | I want to know how much protein is in the portion I would actually eat, rather than compare differently sized bars by the front of the pack. |
| Protein claim | Read the exact claim and nutrition panel. The high-protein criterion shown in the annex on legislation.gov.uk is that protein provides at least 20% of the food’s energy; a product name containing “protein” is not the same claim. | If a high-protein claim matters to me, I’ll check the claim on the particular product instead of assuming every protein bar meets that criterion. |
| Late-night portion | Check energy for one bar and how many bars you intend to eat. NHS Every Mind Matters advises that large meals close to bedtime may make it harder to fall asleep. | One bar may be the portion I have in mind; eating several would be a different-sized snack. |
| Sugars | Compare sugars on the same per-bar basis. Nature Valley UK lists about 7g for its 40g Peanut & Chocolate bar, Myprotein UK lists 12.2g for the 50g TREK Original Oat flapjack, and Eat Natural UK lists 10.0g for its 40g Dark Chocolate & Peanut bar. | I want the sugar figure for the whole bar, not an assumption that a product with protein has little sugar. |
| Diet and allergens | Check the exact flavour’s ingredients, allergen declarations, precautionary statements and any vegan or gluten-free labelling. GOV.UK food-labelling guidance identifies ingredients including allergens as required information on prepacked food labels. | Gluten-free or vegan wording would not answer every allergy question for me; I need to read the current pack. |
Common buying mistakes
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Reading “protein” as a high-protein claim
Bars can contain similar grams of protein but come in different serving sizes. The high-protein criterion in the annex on legislation.gov.uk concerns protein’s share of the food’s energy, not just its grams per bar.
Check both the whole-bar nutrition values and the wording of the claim on the product you are buying.
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Overlooking the rest of the portion
Protein does not tell you the bar’s energy or sugars. Eating more than one also changes the size of a late-night snack; NHS Every Mind Matters advises that large meals near bedtime may make it harder to fall asleep.
Compare energy and sugars per complete bar, then decide how many bars make up your intended portion.
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Using one dietary label to answer every allergen question
Gluten-free status does not rule out peanuts, soya or milk. Joybuy UK lists those allergens for the Nature Valley Peanut & Chocolate bar despite its gluten-free description.
Read the current pack’s ingredients and allergen statements for the exact flavour, including any “may contain” wording.
Brand and product references
These examples describe particular bars or ranges, not every product made by each brand.
Nature Valley
Its Protein Peanut & Chocolate cereal bar provides a 40g portion to compare with larger flapjacks.
- Nature Valley UK lists around 10g protein and around 4g fibre per bar.
- Joybuy UK lists peanuts, soya and milk as allergens for its 4 x 40g pack; check the current pack for precautionary statements too.
TREK
TREK makes protein flapjacks and bars. Nutrition and dietary details need checking by flavour.
- Myprotein UK lists the Original Oat Protein Flapjack as vegan and gluten-free, with 10.2g protein per 50g flapjack.
- The same Original Oat listing gives 217 kcal and 12.2g sugars per flapjack. Those figures should not be applied to another TREK flavour.
Eat Natural
Its Dark Chocolate & Peanut Protein Bar is a 40g nut-and-chocolate option.
- Eat Natural UK lists 7.8g protein and 2.4g fibre per bar.
- The same product lists 220 kcal and 10.0g sugars per bar, contains peanuts and soya, and may contain milk and tree nuts.
Cereal bars and flapjacks on Joybuy
These packs offer peanut-and-chocolate bars, other nut bars and a TREK flapjack to consider for a late-night snack. Compare each exact variant’s label: the nutrition details for TREK Original Oat, for example, do not describe the Biscoff flapjack below.
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Nature Valley Protein Peanut & Chocolate Bar, 4 x 40g
For a single-bar snack, the 40g portion makes whole-bar nutrition figures relevant. Nature Valley UK lists around 10g protein per Peanut & Chocolate bar. Joybuy UK lists peanuts, soya and milk as allergens for this pack; read the current packaging before eating it.
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KIND Protein Dark Chocolate Nut Bars, 3 x 42g x 6pcs
If you plan to eat one bar late at night, compare the nutrition panel for one 42g bar rather than the multipack. Check this nut-bar variant’s ingredients and allergen statement against your requirements.
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KIND Protein Crunchy Peanut Butter, 3 x 42g
This is a three-bar pack with 42g bars. Compare protein, energy and sugars for one bar when judging the snack portion; if gluten-free status matters, confirm it on this exact variant’s current label.
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TREK Biscoff Flapjack, 3 x 50g
This pack contains 50g flapjacks. For a late-night portion, check the protein, energy and sugars for this Biscoff variant itself; do not use figures or gluten-free labelling from TREK Original Oat as a substitute. Check its ingredients if wheat or soya matters to you.
Frequently asked questions
Does “protein” in a cereal bar’s name mean it is high in protein?
No. The high-protein claim criterion shown in the annex on legislation.gov.uk requires protein to provide at least 20% of the food’s energy. Check the claim and nutrition panel for the exact bar rather than treating its product name as that claim.
What should I check if I eat a cereal bar close to bedtime?
Check the nutrition values for the whole bar and decide how many bars make up your portion. NHS Every Mind Matters advises that eating large meals close to bedtime may make it harder to fall asleep; protein wording alone does not tell you the size of your snack.
Does a gluten-free protein bar avoid other common allergens?
No. Gluten-free labelling addresses gluten, not every ingredient or precautionary statement. For example, Joybuy UK lists peanuts, soya and milk as allergens for Nature Valley Protein Peanut & Chocolate; read the current pack for the exact bar you intend to eat.