Protein bars aren’t just gym snacks anymore. In 2026, they’re used as mini meal replacements, post-workout recovery snacks, and healthier alternatives to chocolate bars.
Two of the most popular protein bars in the UK are Grenade Carb Killa and Huel Bars.
They’re both high in protein, low in sugar, and widely available — but they’re designed for very different types of people.
If you’re deciding which bar belongs in your gym bag, car, or desk drawer, this 2026 comparison breaks down the real differences, including who each bar is best for, where they fall short, and how to choose the right one for your goals.
Quick Verdict (Straight Answer)
Choose Grenade Carb Killa if your priority is high protein, ultra-low sugar, and gym-focused macros.
Choose Huel Bars if you want a plant-based, lower-calorie bar with broader nutritional support.
Neither bar is “better” overall — they simply serve different purposes.
I’ve Compared Both — Here’s the Real Difference
The biggest difference between Grenade and Huel bars isn’t protein alone — it’s how and why people actually use them.
Grenade Carb Killa feels like a cheat snack without the guilt. It’s filling, dessert-like, and ideal around training.
Huel Bars feel more like a nutritionally balanced snack. They’re lighter, plant-based, and designed for everyday health rather than muscle recovery.
Understanding that difference makes choosing much easier.
Grenade Carb Killa Protein Bars — In-Depth Review
Grenade Carb Killa is the best-selling protein bar in the UK, and it earns that title by combining dessert-level taste with serious fitness macros.
Each bar is triple-layered, with a crunchy top, soft centre, and chocolate coating — making it feel far closer to a treat than a supplement.
Key Strengths
20g protein per bar – excellent for muscle recovery and satiety
Ultra-low sugar – typically under 1.5g per bar
Low net carbs – fits low-carb and calorie-controlled diets
High fibre – supports fullness and digestion
Huge flavour range – Cookies & Cream, Birthday Cake, Fudge Brownie, White Chocolate Salted Peanut
Nutrition Snapshot (Approx.)
Calories: ~220 kcal
Protein: 20g
Sugar: <1.5g
Fibre: High
Best For
Gym-goers and strength trainers
Low-carb or fat-loss diets
Anyone wanting a sweet, filling protein snack
Downsides to Be Aware Of
Not suitable for vegans
Higher calories than some “health” bars
Sweeteners may not suit everyone
Summary:
Grenade Carb Killa is a fitness-first protein bar that prioritises protein, low sugar, and indulgent flavour.
Huel Bars — In-Depth Review
Huel Bars take a more holistic nutrition approach. Instead of focusing purely on protein, they deliver a plant-based snack with added vitamins, minerals, and fibre.
They feature a smooth caramel layer with a vegan chocolate coating, offering a dessert-style taste without animal ingredients.
Key Strengths
13g plant-based protein per bar
Under 200 calories – easy to fit into most diets
Added vitamins and minerals – supports overall nutrition
High fibre & low salt – good for digestion and heart health
100% vegan – suitable for plant-based diets
Nutrition Snapshot (Approx.)
Calories: <200 kcal
Protein: 13g
Sugar: Low
Fibre: High
Best For
Vegans and vegetarians
Health-focused snackers
Those prioritising nutrition over protein alone
Downsides to Be Aware Of
Lower protein than gym-focused bars
Less filling for post-workout use
Not designed specifically for muscle recovery
Summary:
Huel Bars are best suited to people who want balanced, plant-based nutrition, not just protein.
Grenade vs Huel Bars: Side-by-Side Comparison
| Feature | Grenade Carb Killa | Huel Bars |
|---|---|---|
| Protein | 20g (whey blend) | 13g (plant-based) |
| Calories | ~220 kcal | <200 kcal |
| Sugar | <1.5g | Low |
| Fibre | High | High |
| Vitamins & Minerals | Minimal | Added |
| Diet Type | Fitness / low-carb | Vegan / health-focused |
| Taste | Triple-layer, dessert-like | Smooth caramel & vegan chocolate |
| Best For | Gym & muscle recovery | Daily nutrition & snacking |
Which Protein Bar Should You Choose?
Choose Grenade Carb Killa if you:
Train regularly or lift weights
Want higher protein per bar
Prefer ultra-low sugar
Enjoy dessert-style snacks without the guilt
Choose Huel Bars if you:
Follow a plant-based or vegan diet
Want broader nutrition, not just protein
Prefer lower calories
Snack mainly for health, not training
Where to Buy Grenade & Huel Bars in the UK
At Muscle Products Store, you can shop both with confidence:
100% authentic UK stock
Fast delivery (next-day available before 3pm)
👉 Grenade Carb Killa Protein Bars
👉 Huel Bars
Related Guides You May Find Helpful
Final Expert Verdict
Both Grenade and Huel bars are excellent — but they are built for different users.
Grenade Carb Killa wins for gym-goers who want high protein, low sugar, and indulgent flavour.
Huel Bars win for people who want plant-based nutrition and everyday health support.
Choose based on how you train and how you snack, not hype.
