Parents and carers packing lunches
When a packaged snack is convenient, compare its portion and nutrition label with the rest of the lunch. Check the exact pack’s allergen information before sharing it with a child.
Who is this for?
Adults choosing a portable protein snack
Compare fat per 100g across different bar sizes, then look at the protein, sugars and amount in the bar you would actually eat. Low sugar alone does not tell you how much fat it contains.
Shoppers with ingredient exclusions
A vegan description or a familiar brand name cannot replace a check of the exact flavour’s ingredients and allergen statements.
What matters when choosing?
Decide whether a packaged bar is needed for this lunch, then compare labels on the same per-100g basis before judging the portion you will pack.
| Priority | What to check | When it matters to me |
|---|---|---|
| Total fat | Compare fat per 100g across bars, then fat in the whole bar. Check saturated fat separately. NHS label guidance defines low fat for solid food as 3g or less per 100g. | I’m trying to choose a bar with less fat without mistaking a smaller portion or a low-sugar claim for a low-fat product. |
| The whole lunch | Check the bar’s portion size, energy, sugars and salt alongside the other food being packed. NHS Healthier Families recommends fruit and vegetables as snack choices. | A bar would be one convenient snack in the lunch, not a substitute for everything else in it. |
| Allergens | Read the exact flavour’s ingredients, emphasised allergens and any precautionary statement. The Food Standards Agency explains that precautionary allergen labelling signals possible unintended allergen presence. | If I’m sharing lunch with someone who must avoid an ingredient, another flavour’s label is not enough to make the choice. |
| Protein and sugars | Compare protein and sugars per bar, but keep the per-100g fat comparison alongside them. Check whether the pack carries a warning about excessive consumption. | I may want protein in a portable snack, but that does not make the bar a complete lunch or answer the lower-fat question. |
| Plant-based choice | Check the exact product’s vegan description, ingredients and allergen statement, then compare its fat per 100g with other bars. | Avoiding animal-derived ingredients may decide which bars I consider; I still need to assess fat and any allergens separately. |
What should you watch for?
-
Assuming high protein or low sugar means low fat
Tesco lists 13g fat per 100g for Grenade Chocolate Chip Cookie Dough 35g; PhD lists 14g for Smart Bar Choc Brownie, and Barebells lists 15g for Salty Peanut. None meets the NHS low-fat benchmark of 3g or less per 100g for solid food.
Read total and saturated fat on the nutrition panel rather than relying on the claims on the front.
-
Comparing only fat per bar
The reviewed Grenade, Barebells and PhD bars weigh 35g, 55g and 64g respectively. Their per-bar figures therefore describe different-sized portions.
Use fat per 100g for a like-for-like label comparison, then check what the bar you plan to pack contains.
-
Relying on another flavour’s allergen label
The reviewed bars have different ingredient and allergen declarations. The Food Standards Agency says a precautionary allergen statement communicates a risk of unintended presence.
Check the ingredients and any precautionary statement on the exact pack, particularly when sharing food.
-
Using a bar as the default lunch snack
A protein bar is a packaged snack, not the rest of the lunch. NHS Healthier Families identifies fruit and vegetables as snack choices and advises aiming for no more than two packaged snacks a day for children.
Decide what role the bar has in the lunch before choosing one for convenience.
Brands and retail references
These examples help illustrate why the exact product label matters; a brand name does not establish that every bar in its range has the same nutrition or ingredients.
Grenade
Tesco lists a 35g Chocolate Chip Cookie Dough protein bar.
- Tesco declares 4.6g fat and 12g protein per 35g bar, with 13g fat per 100g.
- Its per-100g fat figure is above the NHS low-fat benchmark; check the exact pack’s allergens.
PhD
PhD lists Choc Brownie within its Smart Bar range.
- PhD declares 21g protein and 9.2g fat per 64g Choc Brownie bar.
- It declares 14g fat per 100g and warns that excessive consumption may cause laxative effects.
Barebells
Salty Peanut and Vegan Fudge Brownie are distinct options with different labels.
- Barebells declares 20g protein per 55g Salty Peanut bar and 15g per 55g Vegan Fudge Brownie bar.
- Their declared fat values are 15g and 16g per 100g respectively. Salty Peanut contains milk, peanuts and soy; Vegan Fudge Brownie contains wheat and soy.
Quest
Quest’s US product page describes its Chocolate Peanut Butter Protein Bar.
- That US label declares 20g protein and 9g fat per 60g bar.
- The US label also lists milk, peanuts, almonds and soy. Check the local pack and recipe before using those figures for a UK lunch choice.
Myprotein
Tesco lists Myprotein Crispy Wafer Vanilla 40.4g and Chocolate Flavour 41.9g products among its protein snacks.
- The named flavours and pack weights give shoppers a starting point for identifying the product.
- Compare the exact pack’s fat, saturated fat and ingredients before considering either wafer for a lower-fat lunch.
Tesco
Tesco is a retailer reference for named single bars and protein snacks, rather than a protein-bar formulation.
- Its Grenade Chocolate Chip Cookie Dough listing gives both per-100g and per-35g nutrition figures.
- A retailer category or meal-deal listing does not establish whether an individual bar suits a particular lunch or dietary exclusion.
Joybuy protein-bar options
These portable bars and flapjacks may be considered as packaged lunch snacks. If keeping fat lower is the main aim, compare each exact pack’s nutrition panel before choosing; inclusion here is not a low-fat claim.
No image available
Nature Valley Protein Peanut & Chocolate Bars 4 x 40g
The four-pack offers individual 40g bars for a packed snack. Its stated fat content is a poor fit when reducing fat is the priority; check the exact pack’s nutrition and allergen labels before sharing it.
No image available
Nature Valley Protein Salted Caramel Nut Bars 4 x 40g
This four-pack also contains individual 40g bars. Its stated fat content is a poor match for a lower-fat lunch, so compare its per-100g panel and check the allergen declaration on the pack.
No image available
Trek Salted Caramel Protein Flapjacks 3 x 50g
The three-pack contains individual 50g flapjacks for a packed snack. It may suit a plant-based selection, but its stated fat content works against a lower-fat aim; confirm the exact pack’s ingredients and allergen statement.
Common questions
Does less fat than another bar mean a protein bar is low in fat?
No. A comparison between two bars does not establish that either is low in fat. NHS food-label guidance gives 3g fat or less per 100g as the low-fat benchmark for solid food, so check the exact bar’s per-100g figure.
Which nutrition figures should I compare first?
Start with total fat, saturated fat, sugars and salt per 100g so different bar sizes are comparable. Then read the figures for the whole bar you intend to pack; NHS guidance notes that labels may also show nutrition per portion.
Can a protein bar be the whole school-holiday lunch?
Treat it as a snack component, not a complete lunch. NHS Healthier Families recommends fruit and vegetables as snack choices; consider what other foods will be included rather than using the protein claim to stand in for the meal.
Should I check allergens on every flavour?
Yes. Read the ingredients and allergen information on the exact pack. The Food Standards Agency explains that a precautionary statement such as “may contain” communicates possible unintended allergen presence, which matters when food is being shared.
Why do some bars carry a laxative-effect warning?
PhD’s Smart Bar information warns that excessive consumption may cause laxative effects. Follow the guidance on the product you buy rather than assuming that several bars can be eaten as though they were one serving.