Who is this choice for?

People tracking fat intake

If fat grams matter to your food plan, compare the figure per 100g before looking at the amount in one bar. Check the protein per bar separately so a lower-fat choice still fits the role you want the snack to play.

Gym-bag snack planners

Individually portioned bars are convenient to carry between training, work and travel. Read the exact pack’s storage directions and allergen statement before leaving bars in your bag or buying several at once.

Shoppers comparing low-sugar bars

A low sugar figure does not answer the lower-fat question. Compare both lines of the nutrition panel: the documented PhD Smart Choc Brownie bar, for example, lists 1.2g sugar and 9.2g fat per 64g bar, according to PhD.

What should you compare?

Start with comparable fat figures, then use the per-bar values and pack information to decide what works as a snack you can carry.

Priority What to check Your needs
Fat content Compare the exact flavours’ fat per 100g, then fat per bar. For solid foods, legislation.gov.uk lists no more than 3g fat per 100g as the UK low-fat claim threshold; a bar can be lower in fat than another without meeting it. I’m trying to keep track of the fat in each snack, not choose by a word such as “lean” alone. Myprotein UK lists 8.6g per 100g and 3.4g per 40g bar for Lean Layered White Chocolate & Raspberry.
Protein and portion Read protein per bar alongside bar weight; use per-100g figures when serving sizes differ. Myprotein UK lists 15g protein in a 40g Lean Layered bar and 18g in a 45g Lean Protein Cookie Dough bar. For a between-meal snack, I want to know what one whole bar provides, rather than comparing protein numbers without their serving sizes.
Sugar and flavour Check sugar and fat on the same flavour’s panel. PhD lists 1.2g sugar and 9.2g fat per 64g Smart Choc Brownie bar; Barebells UK lists 6.4g fat per 55g Cookies & Cream bar. I may prefer a particular flavour or a lower sugar figure, but neither tells me whether that bar meets my lower-fat aim.
Ingredients and warnings Read the current ingredient and allergen statements for the exact flavour, including “may contain” wording. Check any warning about excessive consumption of sweeteners or polyols. Before buying a case, I need to know whether its ingredients and warnings work for me; another flavour in the range may have a different label.
Storage Follow the pack’s temperature and storage directions. Barebells UK specifies room-temperature storage for Cookies & Cream; Grenade UK gives a cool, dry 15°C–22°C range for its Chocolate Fudge bar. If a bar will spend hours in my gym bag, I need somewhere to keep it that follows its own storage instructions.

What can be easy to overlook?

  • Reading “lower fat” as “low fat”

    A comparison with another bar does not establish a low-fat claim. Legislation.gov.uk lists a limit of 3g fat per 100g for a low-fat claim on solid foods; the named flavours compared here have documented figures above that limit.

    Use fat per 100g for the comparison and fat per bar for your portion. If a pack gives a percentage reduction, check which product or average it uses as the comparator.

  • Choosing on protein or sugar alone

    Protein, sugar and fat are separate figures. PhD lists 1.2g sugar but 9.2g fat in a 64g Smart Choc Brownie bar, so its sugar figure cannot stand in for a fat comparison.

    Decide which figure matters for this snack, then compare the nutrition panels for the exact flavours and serving sizes you might buy.

  • Buying a multipack before reading the label

    The documented bars include declared allergens, precautionary “may contain” statements and warnings that excessive consumption may have laxative effects. A different flavour’s ingredient list is not a substitute for the one on your pack.

    Read the current label for the exact flavour before buying a case, particularly if an ingredient or precautionary allergen statement affects your choice.

    A multipack may be impractical to use if its label identifies an ingredient you need to avoid.

  • Leaving bars in a hot gym bag

    Storage directions differ by product. Grenade UK instructs shoppers to keep its Chocolate Fudge bar in a cool, dry place at 15°C–22°C, away from direct sunlight and changes in heat.

    Check the instructions on your chosen bar and avoid leaving it in direct sun or a hot car.

Relevant brands and ranges

Myprotein

Myprotein UK lists Lean Layered and Lean Protein bars with nutrition figures that can be compared by flavour.

  • Its Lean Layered White Chocolate & Raspberry bar lists 8.6g fat per 100g and 15g protein per 40g bar, according to Myprotein UK.
  • That fat figure exceeds the UK low-fat claim threshold for solid foods listed by legislation.gov.uk. Myprotein notes that Lean Protein Bar nutrition can vary by flavour.

Barebells

Barebells UK lists original and vegan protein-bar flavours with different ingredients and nutrition panels.

  • Its Cookies & Cream bar lists 20g protein per 55g bar and room-temperature storage.
  • Cookies & Cream lists 12g fat per 100g and contains milk; its label also carries precautionary allergen wording and an excessive-consumption warning.

PhD

PhD’s Smart Bar range includes the documented Choc Brownie flavour.

  • PhD lists 21g protein and 1.2g sugar per 64g Choc Brownie bar.
  • The same bar lists 14g fat per 100g, so its sugar figure should not be used as a lower-fat comparison. PhD warns that excessive consumption may cause laxative effects.

Grenade

Grenade UK provides product information for its protein-bar flavours, including Chocolate Chip Salted Caramel.

  • Grenade lists 20g protein and 1.4g sugar for Chocolate Chip Salted Caramel.
  • Check the exact flavour’s fat panel before choosing it for a lower-fat aim. Grenade’s Chocolate Chip Salted Caramel page also carries allergen and excessive-consumption warnings.

Tesco

Tesco Groceries listed several Grenade protein-bar flavours in its snack-bar assortment.

  • A grocery listing can help identify the exact flavour and bar size you intend to compare.
  • Use the product’s current nutrition and allergen label, rather than its retailer category, to decide whether it fits your needs.

Joybuy protein-bar multipacks

These Grenade multipacks contain individually sized bars that can be packed for a gym-bag snack. Compare each exact flavour’s fat panel before treating it as a lower-fat choice; a protein or low-sugar description does not settle that question.

Grenade Soft Core Double Chocolate protein bars, pack of twelve 50g bars

Grenade Soft Core Double Chocolate, 12 × 50g

A multipack of individually sized bars for taking one as a gym-bag snack. Check the Double Chocolate nutrition panel for fat per 100g and per bar, along with its ingredients and warnings, before choosing it for a lower-fat plan.

View on Joybuy
Grenade Oreo Flavour protein bars, pack of four 60g bars

Grenade Oreo Flavour, 4 × 60g

Four individually sized bars offer a smaller multipack for gym-bag snacks. The product name describes protein and sugar, not fat: read the Oreo Flavour fat figures and allergen statement separately.

View on Joybuy
Grenade Soft Core Golden Caramel protein bars, pack of twelve 50g bars

Grenade Soft Core Golden Caramel, 12 × 50g

This pack provides 50g bars that can be taken out one at a time for a gym bag. Compare the Golden Caramel fat panel with other exact flavours, and read its ingredients and warnings before buying twelve.

View on Joybuy
Grenade White Chocolate Salted Peanut Flavour protein bars, pack of twelve 60g bars

Grenade White Chocolate Salted Peanut Flavour, 12 × 60g

A twelve-bar pack for portioning out gym-bag snacks. If fat reduction is your priority, check this flavour’s fat per 100g and per 60g bar; read its allergen statement carefully before choosing a peanut-flavoured product.

View on Joybuy
Grenade Soft Core Peanut Butter protein bars, pack of twelve 50g bars

Grenade Soft Core Peanut Butter, 12 × 50g

These individually sized bars can be packed one at a time. Check the Peanut Butter flavour’s fat figures against your other options, and read its current ingredient and allergen information before buying the multipack.

View on Joybuy

Frequently asked questions

Does “lower fat” mean the same as “low fat” on a UK protein bar?

No. Legislation.gov.uk lists no more than 3g fat per 100g as the UK low-fat claim threshold for solid foods. A bar can have less fat than a named comparator and still exceed that threshold; check its fat per 100g and the basis of any comparison.

Which numbers matter when comparing bars of different sizes?

Compare fat per 100g to put the bars on the same basis, then check fat and protein per bar for the portion you will eat. Bar weights differ: Myprotein UK lists a 40g Lean Layered bar, while PhD lists a 64g Smart Choc Brownie bar.

Can a low-sugar protein bar still contain more fat than another bar?

Yes. PhD lists 1.2g sugar and 9.2g fat in its 64g Smart Choc Brownie bar; Barebells UK lists 6.4g fat in its 55g Cookies & Cream bar. Check sugar and fat separately, using the per-100g figures for a direct fat comparison.

Can I leave protein bars in my gym bag?

Follow the storage instructions for the exact bar. Barebells UK specifies room-temperature storage for Cookies & Cream, while Grenade UK instructs shoppers to keep its Chocolate Fudge bar cool and dry at 15°C–22°C, away from direct sunlight and changes in heat.

What should I read before buying a multipack?

Read the exact flavour’s current nutrition panel, ingredients, allergen and precautionary “may contain” statements, storage directions and any excessive-consumption warning. Formulations can differ between flavours; Myprotein UK explicitly notes that Lean Protein Bar nutrition values may vary by flavour.