If calories per whole bar are your starting point, Tesco lists its 40g Fulfil Chocolate Hazelnut Whip bar at 150 kcal, with 14g protein. If you want around 20g protein in one bar, Myprotein lists 20g and 231 kcal for its 65g Speculoos Protein Light Bar, while PhD lists 21g and 245 kcal for its 64g Chocolate Peanut Butter Smart Bar. Compare the exact flavour and portion before buying a multipack: a low-sugar claim does not tell you the calories per bar.
The useful starting point is whether a smaller portion, more protein in one bar or an ingredient check matters most to your shop.
Compare the energy in the whole bar you plan to eat, not just claims on the front of the wrapper. Tesco lists a 40g Fulfil Chocolate Hazelnut Whip bar at 150 kcal and 14g protein, giving you a portion to compare with larger bars.
If protein per bar takes priority, check the calorie trade-off too. Myprotein lists 20g protein and 231 kcal for its 65g Speculoos Protein Light Bar; PhD lists 21g and 245 kcal for its 64g Chocolate Peanut Butter Smart Bar.
Low-sugar bars can contain polyols, and ingredients differ between products and flavours. Read the exact bar’s ingredient list, allergen statement and any warning before choosing a multipack.
Start with the whole-bar portion and protein amount, then check whether the flavour, ingredients and pack format work for your weekly shop.
| Priority | What to check | Your needs |
|---|---|---|
| Calories and protein | Compare kcal and protein per whole bar for the exact size and flavour. Tesco’s checked Fulfil bar is 150 kcal and 14g protein per 40g; Myprotein’s checked Speculoos bar is 231 kcal and 20g per 65g. | I’d choose a smaller portion if 14g protein meets my aim; if I want about 20g in one bar, I’ll allow for the different calorie figure. |
| Weekly-shop fit | Check the retailer listing for your delivery area or store, the number of bars in the pack and the nutrition per bar. A category listing does not establish local stock. | I want bars I can add to my usual grocery order, in a pack size that matches how often I expect to use them. |
| Sugar and polyols | Read sugars alongside calories, then check the polyol declaration and any excessive-consumption warning on the exact product. | Low sugar matters to me, but it would not replace checking the whole nutrition panel and ingredients. |
| Flavour and allergens | Check the selected flavour’s ingredients and allergen statement; milk, soya and nuts feature in some of the researched bars. Nutrition can also vary by flavour. | Before committing to several bars, I want a flavour and ingredient list I can check for my household. |
Sugar and energy are different figures. The checked bars range from 150 kcal for Tesco’s 40g Fulfil bar to 245 kcal for PhD’s 64g Chocolate Peanut Butter Smart Bar, despite their protein-bar positioning.
Set the calories-per-bar figure you want to compare first, then read protein and the rest of the exact flavour’s nutrition panel.
The researched Fulfil, Myprotein and Grenade products have differing ingredients and polyol information; some carry warnings about excessive consumption.
Check the exact flavour’s allergens, ingredients and warnings before deciding whether a multipack suits your household.
Tesco listings show selected Fulfil and Grenade products, but the range available for a particular shop or delivery area can differ.
Check your chosen retailer and delivery area when putting together the weekly order.
These are references for particular products and ranges, not a claim that every flavour or retailer listing has the same nutrition or availability.
Tesco lists the Chocolate Hazelnut Whip multipack with 40g bars at 150 kcal and 14g protein per bar.
The Protein Light Bar’s Speculoos nutrition information lists 20g protein and 231 kcal per 65g bar.
PhD lists 21g protein and 245 kcal for its 64g Chocolate Peanut Butter Smart Bar.
Grenade states 20g protein and 1.4g sugar for its Chocolate Chip Salted Caramel bar; Tesco also lists selected Grenade bars.
Barebells describes its bars as high in protein with no added sugar and points shoppers towards a UK web shop.
Quest states that its original protein bars provide up to 21g protein per bar, but the product information considered here is from its US store.
Tesco is a grocery-shopping route for checking listed Fulfil and Grenade bars, rather than a protein-bar manufacturer in this comparison.
These Joybuy listings are multipacks of Grenade and PhD bars. Compare their stated pack sizes and exact product labels against your calories-per-bar and ingredient priorities; the selection does not replace the smaller Fulfil-bar comparison above.
No image available
The 12-bar pack suits a shop planned around individually portioned snacks. Each bar is listed as 50g; check its exact nutrition panel and polyol and allergen information against your requirements.
No image available
This is another 12-bar, 50g-per-bar format for a weekly-shop basket. Compare the Golden Caramel label with the Double Chocolate version rather than assuming that different flavours have identical nutrition or ingredients.
No image available
The listing is for twelve 50g bars. If peanut ingredients affect your household’s choice, read the exact pack’s ingredient and allergen statement before selecting this flavour.
No image available
These bars are listed at 60g each in a pack of twelve, so compare calories per whole bar with the 50g Grenade listings rather than comparing pack names alone. Check the exact product’s ingredients and warnings.
The listing title describes twelve 64g Chocolate Peanut Butter bars, but its product details conflict on the flavour and ingredients. Confirm the exact variant and its nutrition and allergen label before considering this pack; the Chocolate Peanut Butter figures elsewhere in this article should not be applied to this listing.
Start with calories per whole bar if you expect to eat one bar at a time, then use the per-100g figure to compare products of different sizes on the same weight basis. Tesco lists the checked Fulfil bar at 150 kcal for 40g, Myprotein lists its Speculoos Protein Light Bar at 231 kcal for 65g, and PhD lists its Chocolate Peanut Butter Smart Bar at 245 kcal for 64g.
No. Check the whole nutrition panel as well as the ingredients and warnings on the exact flavour. Some of the researched bars contain polyols, and manufacturers warn that excessive consumption may cause laxative effects.
No. Compare protein with calories per bar, portion size, sugars, saturated fat, fibre and ingredients. A bar offering more protein may also be a larger portion, so choose using the figures for the flavour and bar size you will actually buy.