For a lower-fat cereal bar, compare total fat per 100g, then check the calories and sugars in the portion you plan to eat. Tesco Groceries lists Kellogg's Nutri-Grain Strawberry at 8.3g fat per 100g, the lowest of four specific examples compared here, but none of those four meets the NHS low-fat threshold of 3g or less per 100g.
If you are accounting for what a cereal bar contributes to your eating plan, compare nutrition per 100g and the amount in the bar or pack you will actually eat. A smaller bar can have fewer calories per portion without being low in fat per 100g.
Look at total fat rather than assuming that oats, fibre or protein make a bar low in fat. The NHS low-fat threshold for foods is 3g of total fat or less per 100g; the four named examples compared in this article are above it.
Read the ingredients and allergen information on the exact pack. Cereal-bar recipes differ, and a brand name or product-range description cannot establish whether a particular variant meets your requirements.
Start with the per-100g figures to compare bars of different sizes, then use the declared portion to work out what the snack you intend to eat contains.
| Priority | What to check | Your needs |
|---|---|---|
| Total fat | Read total fat per 100g. The NHS defines low fat for foods as 3g or less per 100g. Check saturated fat separately; its low threshold is 1.5g or less per 100g. | I want to distinguish a bar that is lower in fat than another option from one that actually meets the low-fat threshold. |
| Portion and energy | Check the stated serving size and kcal per serving. Establish whether you will eat one bar, both bars in a twin pack or a whole flapjack. | A small bar may fit the portion I have planned, but I need the figures for the amount I will eat. |
| Sugars | Compare sugars per 100g and per intended portion. The NHS classifies foods with more than 22.5g sugars per 100g as high in sugars. | If I am comparing two lower-fat options, I also want to see how their sugar figures differ. |
| Fibre and protein | Read these values on the exact pack alongside total fat, sugars and kcal. A fibre or protein claim does not establish a bar's fat content. | Fibre or protein may matter to me, but neither replaces a check of the full nutrition panel. |
| Ingredients | Check the exact variant's ingredients and allergen statement, including any precautionary wording. Recheck the pack when buying, as recipes can change. | I need to know whether this particular bar fits my ingredient or allergen requirements, not just whether another bar from the brand does. |
Nature Valley UK lists 18.1g fat per 100g for its Crunchy Oats & Honey family pack; Tesco Groceries lists 23g for Graze Peanut Butter Oat Boosts. Both exceed the NHS low-fat threshold despite their other ingredients or nutritional features.
Check total fat per 100g on the exact bar before considering which other features matter to you.
Nature Valley UK gives a two-bar, 42g serving for its Crunchy Oats & Honey family pack. That serving contains 196kcal, 7.6g fat and 11.3g sugars.
Check how many bars the serving figure covers, and use the figures for the amount you intend to eat.
Reduced sugar does not mean reduced fat. Tesco Groceries lists Graze Peanut Butter Oat Boosts at 3.1g sugars per 30g portion but 23g fat per 100g.
Compare total fat, saturated fat, sugars and kcal on the nutrition panel rather than relying on one front-of-pack claim.
Nature Valley UK says its products may be reformulated. Ingredients, serving sizes and allergen information also need checking for the particular bar you choose.
Confirm the product name and read the current pack before relying on figures from another variant or an older listing.
These brands offer different cereal-bar formats, but a range name cannot tell you whether an individual bar is low in fat.
Graze Oat Boost flapjacks include smaller, individually stated portions.
Its Nutri-Grain range includes filled cereal bars; compare the flavour and pack you are considering.
The brand offers crunchy oat bars as well as separate fibre and protein options.
Trek's Original Oat Protein Flapjack is a protein-focused oat option.
Eat Natural UK presents fruit-and-nut bars and describes vegan, gluten-free and high-fibre options within its range.
Older Alpen bar listings need a current-product check before they inform a buying decision.
These cereal-bar packs offer portion-sized options to assess for this buying decision. Use each current pack's nutrition panel to check total fat per 100g and the kcal and sugars in the portion you intend to eat; inclusion here does not identify a low-fat bar.
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For a planned single-bar snack, check the kcal per 21.5g bar alongside total fat and sugars per 100g on the current pack. The pack contains six bars.
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If the Light name draws your attention, check what the current pack says rather than treating it as a low-fat classification. Compare total fat per 100g and the nutrition for the portion you will eat.
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This six-bar pack allows you to consider a 21.5g bar as one portion. Check its current per-bar kcal and sugars as well as total fat per 100g before comparing it with other flavours.
The NHS defines low fat for foods as 3g of total fat or less per 100g. Check the total-fat figure on the exact product's nutrition panel; a bar being lower in fat than another bar is not the same as meeting that threshold. Saturated fat is a separate measure, with an NHS low threshold of 1.5g or less per 100g.
Use both: per-100g figures let you compare different-sized bars and assess the low-fat threshold, while per-bar figures show what the portion you intend to eat contributes. Check whether the stated serving covers one bar, a twin pack or a larger flapjack.
No. Tesco Groceries lists Graze Peanut Butter Oat Boosts at 3.1g sugars per 30g portion and 23g fat per 100g. Sugar and fat are different measures, so check both on the nutrition panel.
Read the ingredients and allergen information on the exact pack, including any precautionary 'may contain' statement. GOV.UK guidance says food labels must identify required allergens in the ingredients list; do not assume that two flavours or products from the same brand have identical ingredients.
Not as evidence of a current product. Alpen's product-availability information lists several older bars, including Alpen Light Chocolate & Orange, as no longer being made. If you encounter an Alpen bar, confirm its exact identity and read its current pack details.