Protein bars have become a convenient staple for many — whether it’s for a post-workout boost, an on-the-go snack, or simply to hit daily protein goals. With so many options on the market, it can be hard to know which bar truly offers the best balance of taste, nutrition, and value.
In this review, we’ve compared five of the most popular protein bars based on key nutritional values and taste. Here's what we found.
Grenade
60g
218-233 cals
21g protein
21g carbs
10g fats
7/10 taste
Fulfill
55g
197-214 cals
20g protein
16g carbs
7.4g fats
8/10
Barebells
55g
191-200 cals
20 g protein
15g carbs
8g fats
6/10 taste
ESN
45g
170 cals
14g protein
13g carbs
8.9g fats
6/10
My protein
65g
207 cals
14g protein
2.5g carbs
7.5g fats
4/10
Grenade bars offer a high protein content (21g) and a substantial serving size (60g). However, this comes with higher fat (10g) and carb (21g) levels. Taste-wise, Grenade delivers across several flavours — with the exception of the Birthday Cake variant, which was underwhelming.
Best for: Those prioritising high protein intake and variety in flavours, with fewer concerns about carb or fat content.
Fulfill
Just 5g lighter than Grenade, the Fulfill bar still manages to come in slightly lower in calories, fats, and carbs — without sacrificing protein (20g). The taste is among the best in this group, especially the Peanut Butter flavour.
Best for: Balanced macronutrients with great taste. Ideal for a sweet protein based snack.
Barebells
Barebells offers similar protein and caloric values to Fulfill, with slightly fewer carbs. The Hazelnut Nougat flavour stands out — reminiscent of Ferrero Rocher — although other flavours don’t score quite as highly on taste.
Best for: Those seeking, well-rounded protein bar with decent taste and texture, and slightly lower in calories.
ESN
At 45g, the ESN bar is the smallest of the group. While it has a lower calorie count (170), it also delivers less protein (14g). Flavour options are more limited, and the one tested wasn’t particularly enjoyable.
Best for: Low-calorie snacking when protein requirements are modest.
MyProtein
Despite its larger size (65g), the MyProtein bar underdelivers in protein content, and its taste and texture left much to be desired. It does have low carb and fat content, but the flavour and mouthfeel significantly affect its overall appeal.
Best for: Budget-conscious buyers who prioritise macro numbers over taste.
Final Ranking
Based on a combination of nutritional content, flavour, and overall value, here’s our final ranking:
Fulfill
Barebells
Grenade
ESN
MyProtein
Conclusion: Which Protein Bar Is Best?
Ultimately, the best protein bar comes down to your goals. If you're after taste and balanced macros, Fulfill leads the pack. For leaner snacking with a chocolate-like twist, Barebells is a strong option. For those focused strictly on protein content, Grenade remains a solid pick.
That said, while protein bars are convenient, they should complement — not replace — whole food sources of protein such as lean meats, legumes, and dairy