Hikers planning a short walk
If you want a portioned sweet snack rather than food for a lengthy route, calories per whole bar may matter more to you than choosing the bar with the most protein.
Who these bars may suit
Walkers looking for a protein snack afterwards
A bar can be a convenient way to include protein with food after a walk. For a long or demanding hike, plan what you will eat during the route separately.
Vegan and allergen-conscious buyers
Protein sources and precautionary allergen statements differ between bars. Check the current pack before putting a new product in your hiking bag.
What to check before buying
Start with the length and demands of the walk, then compare nutrition per whole bar and the ingredients you need to avoid.
| Priority | What to check | Your needs |
|---|---|---|
| Calories per bar | Compare kcal for the complete bar, not just per 100 g. Check the stated bar size when comparing different formats. | For a short walk, I want to know the calories in the bar I will actually pack and eat. |
| Food for the route | Consider duration, climbs and intensity alongside total food and carbohydrate. Mammut UK’s hiking guidance identifies carbohydrate as an important fuel for endurance walking. | On a longer or steeper route, I need to plan more than a single lower-calorie bar. |
| Protein and ingredients | Read protein grams per bar and identify whether it comes from milk, collagen or plants. Tesco lists 15 g protein for FULFIL Chocolate Brownie and 12 g plant protein for TREK Choc Caramel; Barebells UK lists 20 g for Cookies & Cream. | If I want a protein snack after walking, I can choose an amount and ingredient source that suit my diet. |
| Sweeteners and tolerance | Check for polyols and any warning on the pack. The NHS notes that excessive consumption of products with more than 10% added polyols may have laxative effects. | I would rather try an unfamiliar sweetened bar before taking it on a remote walk. |
| Allergens | Read the current ingredients and any “may contain” statement. The TREK and Barebells products described by Tesco Groceries and Barebells UK carry different ingredient and cross-contact information. | If an ingredient is unsuitable for me, I cannot rely on “vegan” or “low sugar” wording to settle the allergen question. |
Common buying mistakes
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Taking one low-calorie bar as all the food for a demanding hike
A small snack may not meet the food needs of a long or steep route. Mammut UK’s hiking guidance points to both overall energy needs and carbohydrate for endurance walking.
Plan food and fluids around the route’s duration and terrain; keep the bar as one part of that plan.
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Treating low sugar as a calorie figure
Sugar content does not tell you the calories in a whole bar. For example, PhD lists its standard Smart Bar at 238 calories despite describing it as low sugar.
Compare kcal per complete bar, along with its size, protein and carbohydrate information.
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Trying several unfamiliar polyol-sweetened bars on the trail
Grenade’s Dark Chocolate Raspberry product carries an excessive-consumption warning for polyols. An unexpected digestive effect is particularly inconvenient away from facilities.
Read the current label and try a new bar on an ordinary day before packing it for a remote route.
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Using vegan or protein claims as an allergen check
Tesco lists TREK Choc Caramel as suitable for vegans but also identifies peanuts and soy and gives precautionary allergen warnings. Barebells UK lists milk in its Cookies & Cream bar and warns of possible cross-contact with other allergens.
Check the full ingredients and “may contain” statement on the pack you are buying.
Brand and product-line references
Myprotein
Myprotein UK lists protein bars in several formats, including wafers and oat-based snacks.
- Its Toffee Crunch page lists 111 calories and 6.8 g fibre per bar.
- That page displayed “Notify Me When Available”; check availability before planning to take it on a trip.
FULFIL
Tesco Groceries lists the Chocolate Brownie bar as an individually portioned 40 g option.
- Tesco lists 135 kcal and 15 g protein per bar.
- Its milk protein and collagen make this product unsuitable for a vegan diet; check the full ingredients for other dietary needs.
TREK
Tesco Groceries lists TREK Choc Caramel as a plant-protein bar suitable for vegans.
- The listed 44 g bar contains 159 kcal, 12 g protein and 12 g fibre.
- It contains peanuts and soy and has precautionary warnings for other allergens; vegan labelling is not an allergen clearance.
Barebells
Barebells UK lists its Cookies & Cream product as a 55 g protein bar.
- The brand lists 190 kcal and 20 g protein per bar.
- It contains milk and carries warnings about possible contact with gluten-containing cereals, soy, peanuts and nuts.
Grenade
Grenade UK offers protein bars in confectionery-style flavours, including Dark Chocolate Raspberry.
- The Dark Chocolate Raspberry page describes a protein bar with 0.9 g sugar per bar.
- That product carries a warning about excessive consumption of polyols. Compare the current pack’s kcal figure rather than using its sugar figure to judge calories.
PhD
PhD lists standard and Half Size Smart Bar formats; their nutrition figures apply to different portion sizes.
- PhD lists 21 g protein per standard Smart Bar.
- The standard bar is listed at 238 calories. PhD’s EU listing for the 32 g Half Size showed 129–131 calories by flavour, but was out of stock and did not establish UK delivery.
Joybuy product options
These Grenade and KIND multipacks contain individually sized bars that could be packed as hiking snacks. Compare the current nutrition and ingredient labels for the specific flavour before deciding what to take.
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Grenade Soft Core Double Chocolate, 12 × 50 g
The individually sized bars offer a portioned snack for a short walk or after walking. Check the pack’s calories per bar and its polyol, milk and soy information before taking one on the trail.
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Grenade Soft Core Golden Caramel, 12 × 50 g
This multipack provides separate 50 g bars for packing as snacks. Review the current per-bar nutrition and the polyol, milk and soy details if calories or ingredient tolerance affect your choice.
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Grenade Soft Core Peanut Butter, 12 × 50 g
A 50 g bar is straightforward to portion for a walk. Check the pack for peanuts, milk, soy and polyols, as well as calories per whole bar, before choosing this flavour.
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Grenade Oreo Flavour protein bars, 4 × 60 g
These 60 g bars are a different portion size from the Soft Core options above. If keeping calories per snack down is important, check the whole-bar figure rather than relying on the low-sugar wording; review the polyol and allergen statements too.
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KIND Protein Dark Chocolate Nut Bars, 3 × 42 g
These nut bars provide another individually sized snack format for a walk. Compare calories and protein per 42 g bar with your other options, and check the pack for peanuts, almonds, soy and honey if those ingredients matter to you.
Frequently asked questions
Is one low-calorie protein bar enough food for a long hike?
Do not plan on one small bar as your only food for a long or demanding hike. Mammut UK’s hiking guidance highlights energy needs on longer routes and carbohydrate as a fuel for endurance walking; plan additional food and fluids for the route.
Does low sugar mean a protein bar is low calorie?
No. Check kcal per whole bar: PhD lists its low-sugar standard Smart Bar at 238 calories, while Myprotein UK lists Toffee Crunch at 111 calories per bar. Those figures describe different products and do not tell you which ingredients or portion size suit your walk.
What should I check if I have a food allergy?
Read the current pack’s full ingredients and precautionary “may contain” statement for the exact flavour. The TREK Choc Caramel and Barebells Cookies & Cream listings identify different ingredients and possible cross-contact allergens, so neither a vegan nor a low-sugar description replaces that check.
Why do some protein bars warn about laxative effects?
Some bars contain polyols, also called sugar alcohols. The NHS says products with more than 10% added polyols must warn that excessive consumption may produce laxative effects. Read the label and try an unfamiliar bar before relying on it during a remote walk.