Snackers comparing protein per bar
If you plan to eat one bar during a film, its per-bar nutrition tells you more about that portion than a protein figure per 100g. Compare energy, sugars and fibre in the same portion.
Who is choosing?
Plant-based bar shoppers
TREK describes its bars as suitable for vegans, but its Protein Flapjacks and High Protein bars have different declared protein amounts. Check the exact flavour and format before choosing.
Shoppers checking allergens
Peanuts, other nuts, soya and milk are relevant to several of these recipes. Read the ingredients and precautionary allergen wording on the current pack of the flavour you intend to buy.
What should you compare?
Start with the portion you expect to eat, then compare its nutrition and ingredients rather than choosing from the protein claim alone.
| Priority | What to check | Your needs |
|---|---|---|
| Protein per portion | Read grams per bar and the bar’s weight. TREK states 15g per bar for its High Protein range but 9g for its separate Protein Flapjacks; Nature Valley lists 10.2g per 40g Peanut & Chocolate bar. | I’m eating one bar, so I want to know what that bar provides—not just the figure per 100g. |
| Whole nutrition panel | Compare energy, sugars, saturates and fibre for the same portion. Nature Valley lists 195 kcal, 6.8g sugars and 4.3g fibre per 40g Peanut & Chocolate bar. | A protein figure matters to me, but I also want to see what else comes with that serving. |
| Ingredients | Check the exact flavour’s ingredients and precautionary allergen statement. Nature Valley’s Peanut & Chocolate bar contains peanut, soya and milk and may contain tree nuts. | If I avoid an ingredient, I need the current pack to fit that requirement before I buy a multipack. |
| Bar format | Distinguish a cereal or nut bar from an oat flapjack, and check the individual bar weight. A 40g bar and a 50g flapjack are different portions. | For a film, I’d rather choose the format and portion deliberately than assume similarly packaged bars are equivalent. |
Common buying mistakes
-
Judging a bar by its protein claim alone
Protein does not describe the bar’s full nutrition. In its November 2025 review of 458 snack bars from major UK retailers, Action on Salt & Sugar classified 64% as less healthy under the Government Nutrient Profiling Model; that finding describes the reviewed bars, not every protein bar.
Compare the full per-bar panel, including energy, sugars, saturates and fibre, before deciding which portion suits your plans.
-
Comparing figures for different portion sizes
A per-100g protein figure can obscure what you will get from one bar. Nature Valley lists 10.2g per 40g Peanut & Chocolate bar, while TREK states 9g per Protein Flapjack.
Use per-bar values when comparing one-bar snacks, and check each bar’s weight alongside them.
-
Assuming a protein bar meets dietary requirements
Nature Valley’s Peanut & Chocolate bar contains peanut, soya and milk and may contain tree nuts. Eat Natural’s Dark Chocolate & Peanut bar contains peanuts and soya and has additional precautionary allergen wording.
Check the exact current pack’s ingredients and allergen statement, even if you have bought the flavour before.
-
Relying on an older product listing
Alpen identifies several older bar varieties as no longer made. An old listing may therefore describe a different product from the one you can buy.
Before ordering a multipack, confirm the current product name and check its pack details and best-before date.
Brands and product lines
A brand name alone does not establish the protein or ingredients of a particular bar; compare named products and flavours.
TREK
TREK distinguishes its Protein Flapjacks from its High Protein bars.
- TREK states that its bars are plant-based and suitable for vegans.
- The brand states 9g protein per Protein Flapjack and 15g per High Protein bar. Check the chosen flavour’s label rather than applying one line’s figure to the other.
Nature Valley
Its Protein Peanut & Chocolate cereal bar is a 40g product with a published per-bar nutrition panel.
- Nature Valley lists 10.2g protein and 4.3g fibre per bar and labels this product gluten free.
- The same bar contains peanut, soya and milk and may contain tree nuts.
Eat Natural
Its protein fruit-and-nut range includes distinct peanut-and-chocolate and salted-caramel recipes.
- Tesco lists 10.4g protein per 40g Peanuts, Almonds & Salted Caramel bar.
- Nutrition differs by flavour. Eat Natural lists 7.8g protein and 10.0g sugars per 40g Dark Chocolate & Peanut bar; check each recipe’s nut and soya information.
Graze
Graze sells snacks with differing ingredients and formats, including Oat Boost flapjacks.
- Its flapjack format offers an oat-based option to consider alongside cereal bars.
- Check a specific product’s per-bar panel before comparing its protein with the named bars above.
Kellogg's
The Special K range includes snack bars, and Kellogg's has described Special K Protein Bars.
- The range gives shoppers named bar products to assess by flavour and pack.
- Use a current flavour-specific nutrition panel before comparing protein per bar with another product.
Alpen
Alpen’s own product information distinguishes its current range from older bar varieties.
- Alpen says several older bar varieties are no longer made. Confirm the exact current product before relying on a historical bar listing.
Joybuy product options
These Joybuy options cover peanut-and-chocolate, nut-bar and oat-flapjack formats for a movie-night snack. Use each product’s current pack details to compare the portion and ingredients that matter to you.
No image available
Nature Valley Protein Peanut & Chocolate cereal bars, 8 x 40g
For a one-bar snack, Nature Valley lists 10.2g protein, 195 kcal, 6.8g sugars and 4.3g fibre per 40g Peanut & Chocolate bar. The product is labelled gluten free but contains peanut, soya and milk and may contain tree nuts.
No image available
Nature Valley Protein Salted Caramel Nut bars, 4 x 40g
This 4 x 40g pack offers a salted-caramel nut-bar format. Check the current pack for its per-bar protein, sugars and allergen information before comparing it with the Peanut & Chocolate variety.
No image available
KIND Protein Dark Chocolate Nut bars, 3 x 42g x 6pcs
A dark-chocolate nut-bar option in the stated 42g format. If you plan to eat one bar during a film, compare its current per-bar nutrition and ingredient label with the other flavours here.
No image available
TREK Cocoa Oat Protein Flap Jacks, 3 x 50g
The 50g oat-flapjack format is a different portion from a 40g cereal bar. TREK states 9g protein per bar for its Protein Flapjack line, rather than the 15g stated for its separate High Protein line; check the Cocoa Oat pack’s current nutrition and allergen details.
No image available
KIND Protein Crunchy Peanut Butter bars, 3 x 42g
Choose this 42g peanut-butter-flavoured format if that is the style of bar you want to compare. Read its own per-bar panel and allergen statement rather than applying figures from another KIND flavour.
Questions about movie-night bars
Does a protein claim tell me whether a bar suits movie night?
No. Compare the full nutrition panel for the portion you will eat. For example, Nature Valley lists 10.2g protein, 195 kcal and 6.8g sugars per 40g Peanut & Chocolate bar, so the protein figure answers only part of the buying question.
How should I compare protein in cereal bars and flapjacks?
Use grams per individual bar alongside its weight, rather than assuming that different-sized bars provide the same portion. Nature Valley lists 10.2g per 40g Peanut & Chocolate bar; TREK states 9g per Protein Flapjack and 15g per bar for its separate High Protein range.
Can I choose by a gluten-free or vegan description alone?
Check the exact product and your specific requirement. Nature Valley labels its Peanut & Chocolate bar gluten free, but it contains peanut, soya and milk and may contain tree nuts. TREK describes its bars as suitable for vegans; its different product lines still have different protein figures, and the current pack remains the place to check ingredients and allergens.
Is a 50g protein flapjack the same choice as a 40g cereal bar?
No: they are different formats and portions. Compare the nutrition per bar you intend to eat, then decide whether you prefer the oat-flapjack or cereal-bar format without assuming either has more protein from its size alone.
Can I use an older online bar listing to choose a multipack?
Confirm the current product first. Alpen says several older bar varieties are no longer made; before ordering, check the exact product name and the current pack’s nutrition, ingredients and best-before date.