Strict carbohydrate trackers
If your eating plan has a defined daily carbohydrate allowance, compare the whole bar’s carbohydrate figure with that allowance. Check polyols separately rather than treating a low sugar figure as the answer.
Who needs which checks?
High-protein snack buyers reducing sugar
If protein and a portable snack matter more than a strict carbohydrate limit, compare protein and sugars per bar, then check the full carbohydrate figure so the label does not give a misleading impression.
Vegan or allergen-aware shoppers
Check the exact flavour’s ingredients and allergen statement before comparing nutrition. A bar described as vegan can still contain ingredients such as soya or peanuts.
What matters on the label?
Start with the serving size and carbohydrate figure, then check whether the ingredients and pack format work for how you intend to use the bar.
| Priority | What to check | Your needs |
|---|---|---|
| Carbohydrate and protein | Compare both figures for the whole bar, not just per 100g. Barebells lists 17g carbohydrate and 20g protein for its 55g Cookies & Cream bar; the checked Grenade, Myprotein and PhD examples list 20–21g carbohydrate alongside 20–21g protein per bar. | I need to know whether one bar fits my carbohydrate allowance while providing the amount of protein I am looking for. |
| Sugars and polyols | Read sugars alongside total carbohydrate and any separately listed polyols. Tesco’s Grenade Chocolate Chip Salted Caramel label lists 20g carbohydrate and 18g polyols per 60g bar; PhD lists 21g carbohydrate and 16g polyols per 64g Smart Plant bar. | A low-sugar claim catches my eye, but I also want to check the full label and whether the sweeteners suit me. |
| Ingredients and allergens | Read the current ingredient list, highlighted allergens and precautionary statements for the exact flavour. PhD describes Smart Plant as vegan, while its checked flavour contains soya and peanut paste. | If I avoid an ingredient, the particular bar’s pack matters more to me than assumptions about its brand or product range. |
| Pack format | Confirm the number of bars, each bar’s weight and the flavour before choosing a multipack. Compare nutrition on the same per-bar basis when pack sizes differ. | I would rather check that a flavour fits my requirements before committing to a box of it. |
Common buying mistakes
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Using low sugar as a shortcut for low carbohydrate
A bar can have considerably more labelled carbohydrate than sugars. For example, Tesco lists 20g carbohydrate per 60g Grenade Chocolate Chip Salted Caramel bar.
Compare carbohydrate, sugars, polyols, protein and serving size on the exact flavour’s label before judging whether it fits your plan.
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Ignoring polyols when comparing bars
The checked Grenade and PhD labels list 18g and 16g polyols per bar respectively. Polyol content may also matter to how comfortably you use a bar.
Read the ingredients and any on-pack warnings, and do not assume a brand’s “net” or “impact” carbohydrate wording matches your own counting method.
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Buying a box based on another flavour’s label
Myprotein notes that its displayed Layered Bar nutrition figures are flavour-specific. Ingredient and allergen statements can matter just as much as the nutrition figures.
Check the current label for the flavour and pack size you intend to buy before choosing a multipack.
A box may go unused if its flavour contains an ingredient you avoid or does not fit your carbohydrate allowance.
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Treating therapeutic keto as an ordinary snack choice
Great Ormond Street Hospital describes therapeutic ketogenic diets as very high in fat, with enough protein for growth and very little carbohydrate. An ordinary high-protein bar should not be assumed to fit an individually prescribed diet.
If you follow a medically supervised eating plan, check any bar choice with your healthcare team. Diabetes UK also advises speaking to a diabetes healthcare team before making significant dietary changes.
Brand references
Grenade
Grenade offers Carb Killa protein bars, including the Chocolate Chip Salted Caramel flavour listed by Tesco.
- Tesco’s label lists 21g protein and 20g carbohydrate per 60g Chocolate Chip Salted Caramel bar.
- That flavour also lists 18g polyols; check its ingredients and allergen statement before buying.
PhD
PhD offers Smart Bar products and describes its Smart Plant range as suitable for vegans.
- The checked Smart Plant nutrition panel lists 21g protein per 64g bar.
- It also lists 21g carbohydrate and 16g polyols per bar; the checked Salted Caramel ingredients include soya and peanut paste.
Myprotein
Myprotein’s Layered Bar is one high-protein option to compare by exact flavour.
- Myprotein lists 20g protein per 60g Layered Bar in the checked nutrition information.
- The same information lists 20g carbohydrate and notes that displayed figures vary by flavour.
Barebells
Barebells offers several protein-bar ranges, including Cookies & Cream.
- Barebells lists 20g protein and 17g carbohydrate per 55g Cookies & Cream bar.
- That carbohydrate figure still needs checking against an individual allowance; read the exact pack for ingredients and allergens.
Quest
Quest presents net-carbohydrate figures on its US product pages, which use a different labelling context from the UK bars above.
- Quest states 20g protein and 3g net carbs for its Nutty By Nature Overload Bar on its US page.
- Check a current UK pack before comparing that US net-carb claim with carbohydrate figures on UK labels.
Tesco
Tesco is a retailer, not a protein-bar manufacturer; its grocery listings can help shoppers inspect individual products.
- Its Grenade Chocolate Chip Salted Caramel listing provides per-bar nutrition figures.
- Check the current listing and pack for the flavour, ingredients and nutrition information you intend to use.
Joybuy protein-bar options
These Grenade bars offer different flavours and pack sizes. For a keto-friendly choice, compare the current label of the exact bar with your carbohydrate allowance and ingredient requirements.
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Grenade Oreo Flavour Protein Bars, 4 × 60g
This low-sugar-labelled option comes as four 60g bars. Check the Oreo flavour’s per-bar carbohydrate, polyols and allergens against your requirements rather than using the sugar claim alone.
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Grenade Soft Core Double Chocolate, 12 × 50g
Each bar in this Double Chocolate multipack is 50g. Check its own per-bar nutrition and ingredients before choosing the box for a carbohydrate-tracked plan.
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Grenade Soft Core Golden Caramel, 12 × 50g
This Golden Caramel option is a pack of twelve 50g bars. Use its exact flavour label to check carbohydrate, sweeteners and allergens before deciding whether the multipack suits you.
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Grenade Soft Core Peanut Butter, 12 × 50g
This Peanut Butter variant comes as twelve 50g bars. Check its current carbohydrate figure and ingredient and allergen statement before selecting a multipack.
Questions about keto-friendly bars
Does low sugar mean a protein bar fits a keto-friendly plan?
No: compare the full carbohydrate figure per bar with your own allowance. Tesco lists 20g carbohydrate for its 60g Grenade Chocolate Chip Salted Caramel bar, while PhD lists 21g for a 64g Smart Plant bar; their sugar figures alone do not answer that question.
Should I subtract polyols when counting carbohydrates?
Do not assume one “net carbs” calculation fits every eating plan. Read the UK pack’s full carbohydrate and separately listed polyols, then apply the counting method used by your plan; if your diet is medically supervised, ask your healthcare team which method to use.
What should I check if I have diabetes?
Discuss significant dietary changes with your diabetes healthcare team rather than choosing a keto-style bar on its marketing claims. Diabetes UK gives that advice and, in its May 2021 position statement, says there is insufficient strong evidence to recommend low-carbohydrate diets for people with type 1 diabetes.
Which allergen information matters for a protein bar?
Read the ingredients, highlighted allergens and any precautionary statement on the exact pack you intend to buy. GOV.UK explains that food businesses must tell consumers about 14 specified allergens; flavour names or a vegan description are not substitutes for checking the label.