Grenade Carb Killa Shake Review — Is It Worth It?

Grenade Carb Killa Shakes are the ready-to-drink protein option you'll find in every UK supermarket and petrol station. They're convenient, taste genuinely good, and deliver solid protein — but you pay a serious premium for that grab-and-go format.

What Is It?

Carb Killa Shake is a ready-to-drink (RTD) protein shake in a 330ml bottle, available in flavours like Chocolate Mint, Fudge Brownie, White Chocolate, and Cookies & Cream. Grenade is a UK brand that built its reputation on the Carb Killa protein bar before expanding into shakes and other products. These are designed for convenience — no mixing, no shaker, no mess.

Ingredients & Nutrition

Per 330ml bottle, you get 24g of protein, 8g of fat, and 2.5g of carbohydrates at 170 calories. The protein comes from milk protein, which includes both whey and casein. This means a slower, more sustained release of amino acids compared to a pure whey shake.

The ingredient list is longer than a powder — you'll find stabilisers (gellan gum, carrageenan), emulsifiers, and flavourings. Sweetened with sucralose. Contains milk allergens. The calorie count is higher than most powder-based shakes due to the fat content, though it's still reasonable for a convenient protein source.

Taste & Mixability

Mixability isn't relevant for an RTD, but taste certainly is — and this is where Carb Killa shakes genuinely excel. Fudge Brownie is excellent — thick, rich, and genuinely dessert-like. White Chocolate is sweet and smooth. Chocolate Mint tastes like a liquid After Eight. These are comfortably among the best-tasting protein products on the UK market.

The texture is thick and creamy, closer to a milkshake than a protein drink. It's a premium drinking experience that makes most mixed-from-powder shakes feel watery by comparison.

Effectiveness

With 24g of protein from milk protein (whey + casein blend), a single bottle delivers a solid protein hit. The casein component means slower digestion, which makes these better suited as a between-meals snack than a post-workout shake. They'll keep you feeling fuller for longer than a pure whey equivalent.

For gym-goers who struggle to hit protein targets, having a Carb Killa in the fridge for convenience is genuinely useful.

Value for Money

Here's the catch. A 12-pack typically costs around £29.99, working out to roughly £2.50 per serving. That's 5x more expensive per serving than MyProtein Impact Whey. You're paying for convenience, packaging, refrigerated distribution, and taste. Per gram of protein, this is one of the most expensive options available.

If you buy them from a corner shop or petrol station, expect to pay £3.00-£3.50 per bottle.

Verdict

Grenade Carb Killa Shakes are brilliant for what they are — a convenient, great-tasting protein hit when you can't mix a shake. They're not an everyday protein solution unless money is no object. Buy a few for your fridge as a backup, but rely on a powder for your daily protein needs. A treat, not a staple.

Rating: 7/10