Shoppers planning a protein snack
If you want a smaller sweet snack, compare calories and protein for the whole bar. Check its fat content too: a smaller serving does not establish that the food is low in fat.
Who needs to check what?
People reducing dietary fat
Compare fat per 100g as well as per bar, particularly if your eating plan sets a specific allowance. A medically prescribed very-low-fat diet calls for the individual guidance given by your clinician or dietitian.
Vegan shoppers comparing protein bars
Check vegan suitability for the exact flavour, then read its nutrition panel separately. PhD lists its 64g Smart Plant Salted Caramel bar as vegan, with 13g fat per bar; vegan status does not answer the fat question.
What to compare on the label
Start with fat in a comparable quantity, then check what eating the whole bar would contribute. Calories, protein and ingredients help you decide whether that particular portion suits your plans.
| Priority | What to check | Your needs |
|---|---|---|
| Fat content | Read total fat per 100g and per whole bar; check saturated fat separately. Oxford University Hospitals advises people prescribed no more than 20g fat a day to avoid foods exceeding 3g fat per 100g. | I need to know whether the whole snack fits my fat allowance, not just whether its front-of-pack wording sounds suitable. |
| Portion and calories | Compare bar weight, kcal and protein for the same serving. Tesco lists 136 kcal and 12g protein for its Grenade Oreo 35g bar; PhD lists 245–251 kcal and 21–22g protein for its 64g Smart Bar flavours. | A smaller bar might suit the portion I have planned, but I also want to see how much protein that portion provides. |
| Sweeteners | Read the exact flavour’s ingredients and serving warnings. PhD warns that excessive consumption of its Smart Bars may cause laxative effects. | If sweeteners are a concern for me, I would check the pack before committing to several bars. |
| Allergens and suitability | Check ingredients and may-contain statements on the current pack, alongside any vegan declaration. Tesco lists milk, soy and wheat for Grenade Oreo 35g; PhD lists soy and peanut paste for Smart Plant Salted Caramel. | I need the particular flavour to meet my ingredient requirements; a protein or vegan claim alone cannot confirm that. |
Buying mistakes to avoid
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Treating low sugar or high protein as low fat
Those descriptions refer to different parts of the nutrition panel. Tesco lists 6.0g fat for its 35g Grenade Oreo bar, while PhD lists 8.5–9.2g fat across its 64g Smart Bar flavours.
Compare total fat per 100g and per bar before deciding whether either serving suits your plan.
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Choosing by calories per bar alone
A smaller bar can have a lower calorie total without being lower in fat for its weight. Tesco’s 35g Grenade Oreo bar lists 136 kcal and 6.0g fat.
Put the bar’s weight, calories, fat and protein side by side when comparing portions.
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Overlooking a new flavour’s ingredients
Allergen statements differ by product: Tesco lists milk, soy and wheat for Grenade Oreo 35g, while PhD lists soy and peanut paste for Smart Plant Salted Caramel. PhD also warns about possible laxative effects from excessive Smart Bar consumption.
Read the current label for the exact flavour, including its may-contain and serving statements, before buying a multipack.
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Assuming vegan means lower fat
PhD lists its vegan Smart Plant Salted Caramel bar at 13g fat and 249 kcal per 64g bar. Its dietary suitability and its nutrition values answer separate questions.
Confirm the vegan declaration if you need it, then assess fat per 100g and per bar against your own requirements.
Brand and retailer references
These examples show why the exact product and serving matter; a brand name alone cannot establish low-fat suitability.
Grenade
Grenade offers protein bars in different serving sizes. Tesco’s listing for the 35g Oreo bar gives a concrete example of a smaller portion.
- Tesco lists 136 kcal and 12g protein per 35g Oreo bar.
- The same bar contains 6.0g fat and lists milk, soy and wheat, with a possible-nuts warning.
PhD
PhD lists conventional Smart Bar flavours and a separate vegan Smart Plant Salted Caramel bar on its UK website.
- PhD lists 21–22g protein for its 64g Smart Bar flavours and 21g for the 64g Smart Plant Salted Caramel bar.
- The listed Smart Bar flavours contain 8.5–9.2g fat per bar; Smart Plant Salted Caramel contains 13g. Check the ingredients and PhD’s excessive-consumption warning for the product you choose.
Tesco
Tesco’s protein-bar listings provide pack formats and product-specific nutrition information for comparison.
- Its Grenade Oreo 35g listing gives calories, fat and protein for one bar.
- Compare the nutrition panel for the exact flavour and pack rather than applying one listing’s figures to another bar.
Joybuy protein-bar options
These Grenade multipacks cover three 50g Soft Core flavours and a 60g Oreo flavour. If you are choosing for a low-fat plan, check the current nutrition panel for the exact bar before selecting a pack.
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Grenade Soft Core Protein Bar Double Chocolate, 12 × 50g
For a planned snack, compare fat per 100g and per bar on the Double Chocolate label. Check its milk and soy allergen information and sweetener ingredients before choosing the multipack.
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Grenade Soft Core Protein Bar Golden Caramel, 12 × 50g
Check fat for the whole Golden Caramel bar as well as per 100g when planning a portion. Read the current pack for milk and soy allergens and sweetener ingredients.
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Grenade Soft Core Protein Bar Peanut Butter, 12 × 50g
Compare the Peanut Butter bar’s fat and calories with the portion you intend to eat. Its listed ingredients include peanut, milk and soy; check the current pack if allergens affect your choice.
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Grenade High Protein Low Sugar Protein Bar Oreo Flavour, 4 × 60g
The Low Sugar name does not establish that this Oreo Flavour bar is low in fat. Compare fat per 100g and per whole 60g bar, and check the pack’s milk, gluten and soy allergen information.
Protein-bar questions
Is a lower-calorie protein bar necessarily lower in fat?
No. A lower calorie total may reflect a smaller bar. Tesco lists 136 kcal and 6.0g fat for its 35g Grenade Oreo bar, so check both fat per 100g and fat per whole bar rather than judging by calories alone.
Can a protein bar fit a medically prescribed very-low-fat diet?
Do not assume it will. Oxford University Hospitals advises people prescribed no more than 20g fat a day to check fat per 100g and avoid foods exceeding 3g per 100g; discuss suitable snacks and your individual allowance with the clinician or dietitian managing your plan.
Which label figures should I compare first?
For a low-fat plan, start with fat per 100g and per whole bar. Then compare bar weight, calories, protein and saturated fat for the serving you would eat, followed by ingredients and allergen statements for that exact flavour.
What if I am concerned about sweeteners?
Read the ingredients and serving warnings on the exact bar before buying a multipack. PhD warns that excessive consumption of its Smart Bars may cause laxative effects; the warning does not tell you how you personally will respond.