What should you check?
Start with the amount in one wrapped bar, then use the exact flavour’s label to decide which dietary options and allergen information you can offer.
| Priority | What to check | Your needs |
| Protein per bar |
Compare protein per whole bar and bar weight. Nature Valley UK lists 10.4g per 40g Salted Caramel Nut bar; TREK lists 9g per 50g Peanut Butter flapjack; Tesco lists 7.6g per 45g Nakd Peanut Butter bar. |
I want to know how much protein a single snack provides, rather than compare pack names or figures per 100g alone. |
| Allergen information |
Keep the exact flavour’s ingredients and allergen declaration available. The cited Nature Valley, TREK and Nakd bars contain or may contain different combinations of peanuts, other nuts, soya and milk. |
At a public stall, I need customers to be able to read the wrapper themselves before choosing. |
| Dietary claims |
Check vegan, vegetarian, gluten-free and dairy-free wording separately; none establishes suitability for a particular allergy. Confirm the wording on the pack being offered. |
Some customers may want a vegan bar, while others need to check for milk or nuts. One label cannot answer every question. |
| Sugars and energy |
Read sugars and kcal for the whole bar. Tesco lists 13g sugars and 189 kcal for Nakd Peanut Butter, despite its no-added-sugar wording; TREK lists 12g and 244 kcal for Peanut Butter. |
If I am choosing between a smaller bar and a flapjack, I want the figures for the portion I will eat. |
| Packaging at the stall |
Check that customers can see the original label for each flavour. The Food Standards Agency says food businesses must provide allergen information for prepacked as well as non-prepacked food. |
I want to offer bars without losing the ingredient information that helps customers make their own choice. |
Brand ranges to consider
These references describe particular bars or ranges, not every product made by each brand; check the flavour on the pack.
Nature Valley
Its protein range includes Salted Caramel Nut, a 40g bar Nature Valley UK describes as vegetarian and gluten-free.
- Nature Valley UK lists 10.4g protein per Salted Caramel Nut bar.
- That flavour contains peanut, soya, almond and milk ingredients; check the current pack if ingredients change.
TREK
Its Peanut Butter protein flapjack is a 50g bar described by TREK as vegan and gluten-free.
- TREK lists 9g plant protein per Peanut Butter bar.
- The Peanut Butter flavour contains peanut and soya ingredients and may contain nuts and milk.
Nakd
Tesco lists its 45g Peanut Butter protein bar as vegan, gluten-free and dairy-free.
- Tesco’s per-bar panel lists 7.6g protein and 6.8g fibre.
- The same bar lists 13g naturally occurring sugars, contains peanuts and may contain soya and nuts.
Eat Natural
Eat Natural’s protein fruit-and-nut range includes flavours built around ingredients such as peanuts, almonds and seeds.
- The range offers several nut-and-seed flavour combinations.
- Compare the nutrition and allergen label of the particular bar before offering it as a protein option.
Graze
The Graze Peanut Butter Protein Oat Boost retail listing describes a flapjack-style bar made with oats and peanut butter.
- An oat-based format offers a different style of snack from a fruit-and-nut bar.
- Check the exact product’s per-bar protein and allergen label before comparing it with other flavours.
Snack bars on Joybuy
These Joybuy options include Nature Valley protein bars, TREK flapjacks and a Grenade multipack for a car boot sale refreshment selection. Compare the exact flavour and pack label rather than applying one bar’s nutrition figures to another.
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Nature Valley Protein Peanut & Chocolate Bar 4 x 40g
A four-bar pack to consider when protein per portion matters. Joybuy lists 10.24g protein per serving and identifies peanuts, soya and milk as allergens; check the individual wrapper before offering a bar.
View on Joybuy
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Nature Valley Protein Salted Caramel Nut Bar 4 x 40g
A four-bar pack of the Salted Caramel Nut flavour. Nature Valley UK lists 10.4g protein per 40g bar and describes it as vegetarian and gluten-free; it contains peanut, soya, almond and milk ingredients.
View on Joybuy
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TREK High Protein Flapjack Cocoa Oat 16 x 50g
A 16-pack of 50g Cocoa Oat flapjacks for a stall considering a larger pack. Check this flavour’s wrapper for its protein per bar, dietary wording and allergens; figures for TREK Peanut Butter are not interchangeable with Cocoa Oat.
View on Joybuy
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TREK Salted Caramel Protein Flapjacks 3 x 50g
A three-pack of 50g Salted Caramel flapjacks. Compare this flavour’s per-bar nutrition and allergen label before offering it alongside other TREK bars; ingredients and figures can differ by flavour.
View on Joybuy
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Grenade Soft Core Protein Bar Golden Caramel 12 x 50g
A 12-pack of 50g Golden Caramel bars. Check its per-bar nutrition, ingredients and pack warnings before offering it to customers, particularly where suitability for children or during pregnancy or breastfeeding is relevant.
View on Joybuy
Common questions
How do I compare protein snack bars of different sizes?
Compare grams of protein per whole bar, then check its weight and the rest of its nutrition panel. Nature Valley UK lists 10.4g per 40g Salted Caramel Nut bar, TREK lists 9g per 50g Peanut Butter flapjack, and Tesco lists 7.6g per 45g Nakd Peanut Butter bar; those figures apply to those flavours, not every bar from the brands.
Should I keep bars in their original wrappers at a car boot sale?
Yes, keeping a bar in its original labelled wrapper lets customers inspect its ingredients, allergens and nutrition for the exact flavour. This matters when the options contain or may contain peanuts, other nuts, soya or milk.
Do sealed bars still need allergen information?
Food businesses must provide allergen information for prepacked food, according to Food Standards Agency guidance; prepacked food has an ingredients list that emphasises allergens present. Keep the labelled pack available for customers to inspect rather than relying on a general description of the brand.
Do I need to register to sell refreshments from a car boot sale stall?
If you run a food business in England, Wales or Northern Ireland, Food Standards Agency and GOV.UK guidance says registration with the local authority is required at least 28 days before trading, including for businesses operating from temporary premises. Whether your stall activity amounts to running a food business depends on what you do; ask the relevant local authority about your circumstances. For a stall in Scotland, check the applicable process with the local authority or Food Standards Scotland.
Does ‘no added sugar’ mean a Nakd bar is sugar-free?
No. Tesco’s listing describes Nakd Peanut Butter Protein as having no added sugar, while its nutrition panel lists 13g naturally occurring sugars per 45g bar. Use the pack’s exact wording and let customers check the nutrition panel.