MyProtein Impact Whey Protein Powder vs Grenade Whey Protein Powder 2kg
The short answer: Grenade packs more protein per 100g and a better overall WheyWise score. Most people should pick Grenade.
- 78g protein per 100g, the higher density of the pair
- WheyWise composite score 82 versus 78 for Impact Whey
- Effectiveness score 85, ahead on protein density and formulation
What's in one scoop?
In short: Grenade wins 5 out of 5 headline metrics across protein density, macros and overall score.
What's actually in the tub?
In short: Ingredient panels are similar - both products list comparable claims and watchlist items.
What real buyers say
In short: below are sentiment patterns we read across public Amazon UK reviews, Reddit threads, Trustpilot and editorial reviews. Every theme links to where you can verify it yourself. We don't invent quotes.
- Chocolate Smooth, Salted Caramel and Chocolate Mint flavours come up repeatedly as standouts; reviewers say they "taste pretty fantastic" and aren't overly artificial. [redditrecs]
- The standard 5kg bag works out to roughly 60-65p per 25g serving when bought on a discount code, which long-time UK lifters consistently rank as the best £/g protein in the budget tier. [BarBend review]
- Mixes cleanly with water alone and works well stirred into yoghurt or oats for a high-protein snack. [Amazon UK reviews]
- Standard list prices are widely described as inflated; almost every Reddit thread tells new buyers to wait for a 35-50% discount code rather than pay sticker price. [redditrecs]
- Flavour quality is uneven across the 40+ options - Strawberry Cream and the more obscure variants get noticeably worse feedback than the chart-toppers. [ProteinPromo flavour ranking]
- Holland & Barrett Fudged Up flavour averages 4.8/5 across 12+ reviews; the Carb Killa-inspired flavours are repeatedly described as "feels like a dessert" and easy to drink daily. [Holland & Barrett reviews]
- 78g protein per 100g is one of the higher densities for a UK concentrate at this price point - reviewers buying for macros, not just brand, repeat this. [Gymfluencers review]
- High-street availability via Tesco / Holland & Barrett means you can grab it without waiting for delivery - a meaningful tradeoff for some buyers. [Tesco product page]
- Sticker price is hard to justify against MyProtein on a 35% off code - which several reviewers explicitly note when comparing per-25g protein cost. [Gymfluencers review]
- Brand marketing is polarising - "aggressive aesthetic" comes up as a turn-off for some buyers despite product quality being solid. [Protein Pick and Mix]
Want the full data sheet?
In short: we keep this collapsed because most readers don't need it. Open it to see the complete WheyWise comparison grid - nutrition matrix, digestion profile, ingredient watchlist, and every score component side by side.
Pick Grenade on the data. Either way, never overpay.
Grenade Whey vs MyProtein Impact Whey
MyProtein Impact Whey Protein Powder and Grenade Whey Protein Powder 2kg are two of the most recognised whey concentrates in the UK, and the gap between them is tighter than the brand positioning suggests. MyProtein Impact Whey Protein Powder is the established budget pick from MyProtein: 72g of protein per 100g of powder in the standard formulation, more than 40 flavour options, bag sizes from 250g to 5kg, and a near-permanent rotation of MyProtein discount codes. Grenade Whey Protein Powder 2kg is the high street friendly pick from Grenade, owned by Mondelez since 2021. The 2kg Grenade Whey delivers a higher 78g of protein per 100g, a tighter flavour range that draws on the Carb Killa heritage, and broad UK retail availability across Holland and Barrett, Tesco, Amazon UK and direct.
Grenade Whey Protein Powder 2kg edges ahead on the WheyWise composite score. Grenade Whey 2kg posts an overall 82 versus MyProtein Impact Whey at 78, driven primarily by a stronger effectiveness score (85 vs 70) that reflects the higher protein density per 100g. Both products score equally well on value (95) once you account for the 2kg bag sizing, and the taste and ingredient component scores are level. MyProtein Impact Whey Protein Powder still wins on flavour count and code-driven sale prices that occasionally drop below Grenade on a cost per 25g of protein basis. But on the metric Kevin tracks across the WheyWise database, Grenade Whey Protein Powder 2kg is the better-performing whey concentrate for UK buyers in 2026.