Let’s face it – there’s a trust issue with protein bars.
Most of us have bitten into one at some point, expecting a healthy, satisfying snack… only to find it with a chalky texture, a strange aftertaste, and so much sugar it could rival a chocolate bar. Meet Grenade® Carb Killa Protein Bars, one of the most talked-about high-protein snacks in the fitness world.
Grenade is touted as a guilt-free alternative to sweets, promising delicious taste, low sugar, and nutritional value. But is it truly a healthy snack or just a cleverly marketed sugar bomb in a shiny package?
We’ve taken a close look at flavors, macros, ingredients, and taste to provide you with an objective review. Here are our findings.
Founded in the UK, Grenade® has achieved cult status with its Carb Killa bars – high-protein, low-sugar snacks for athletes, gym-goers, and busy people looking for something healthier on the go. With eye-catching packaging, bold flavors, and claims like “over 20g of protein, under 2g of sugar,” the brand is essentially the Red Bull of protein bars – eye-catching, functional, and ubiquitous.
In addition to bars, the company also offers shakes, spreads, energy drinks, and nutritional supplements. However, in this review, we’ll focus on what the company is best known for: its protein bars.
| ✅ Pros | ⚠️ Cons |
|---|---|
| Genuinely delicious flavors (some are like candy bars) | Sugar alcohols can cause bloating or gas in some users |
| High protein & low sugar — great post-workout option | Not suitable for those avoiding artificial sweeteners |
| Wide variety of unique, indulgent flavors | Some bars feel overly sweet or artificially flavored |
| Great travel or emergency snack | Not a replacement for real whole-food meals |
| No chalky texture like traditional protein bars | On the pricier side ($2.50–$3.50 per bar) |
We tested six of their best-selling bars under real-life conditions (gym snack, late-night cravings, breakfast on the go):
Let’s break them down.
Here’s a look at the typical macros per bar (may vary slightly depending on your taste):
| Nutrition | Per Bar (60g) |
|---|---|
| Calories | 210–230 kcal |
| Protein | 20–23g |
| Carbs | 15–17g |
| Sugar | 1.4g – 2g |
| Fiber | 6–8g |
| Fat | 8–10g (mostly from cocoa butter & nut oils) |
• High in protein – ideal for muscle recovery and a feeling of fullness
• Very low in sugar – instead, maltitol and sucralose
• Adequate fiber content to support digestion
• Keto-friendly and suitable for diabetics (low net carb content)
• Contains sugar alcohols (maltitol), which may cause digestive discomfort in some people.
• Some flavors contain artificial sweeteners and flavorings.
• Still a processed food—not to be confused with whole foods.
Anyone who buys snacks online—especially ones as popular as Grenade bars—wants fast delivery, fair returns, and multiple ways to snag their favorite bars when they’re gone. Luckily, Grenade makes the process easy, whether you’re from the UK, the US, or elsewhere.
• Free standard shipping on all orders over £25.
• Orders are typically dispatched within 1-2 business days.
• Delivery time: 2-5 business days, depending on your location.
• Fully trackable shipping via Royal Mail or other UK courier services.
• Express shipping available for an additional charge.
• Grenade does not currently ship directly to the US from its official website.
• However, the entire range is widely available through:
• Amazon
• GNC
• The Vitamin Shoppe
• iHerb
• Bodybuilding.com
• Shipping rates and speeds in the US vary by retailer. However, Prime-eligible products on Amazon typically ship within two days or less.
Let’s face it—protein bar flavors can be hit and miss. Fortunately, Grenade® offers a fair return policy as long as the items are unopened and in resalable condition.
• 14-day return policy from the delivery date
• Items must be unopened, undamaged, and in their original packaging.
• Refunds will be processed within 5–7 business days of receiving your return.
• Return shipping costs are the responsibility of the customer (unless the product was faulty).
• If you ordered from Amazon, GNC, or other retailers, the seller’s individual return policies apply.
• Amazon, for example, often offers a 30-day return policy, and refunds are usually issued quickly if you report damage or product issues.
Grenade has a strong presence both online and in brick-and-mortar stores. Depending on where you live, you can easily find bars, shakes, spreads, and more here:
• grenade.com – full range, bundles, and seasonal flavors
• Amazon – great for bulk packs, Prime shipping
• iHerb – ships to many countries with good global rates
• [The Protein Works, Bodybuilding.com, Dolphin Fitness] – UK-based fitness shops
• GNC
• The Vitamin Shoppe
• Tesco, Boots, Holland & Barrett (UK)
• Select gyms and supplement shops
A major advantage of purchasing directly from grenade.com? You get access to:
• Limited-edition flavors (often seasonal)
• Combinable bundles for better value
• Merchandise drops and exclusive shaker bottles
• Loyalty benefits or discount codes via the email list
Grenade Carb Killa Bars are one of the few protein bars that actually taste like you’d want to eat them again. For anyone looking for a high-protein snack that feels delicious but doesn’t break the macronutrient limit, these bars are perfect—with a few caveats.
Are they perfectly clean? No.
Are they better than most protein bars on the market? Absolutely.
Are they secretly candy bars? Kind of — but with a conscience.