Protein · head-to-head
MaxiNutrition Promax Lean vs Mutant Whey.
Our independent head-to-head review of MaxiNutrition Promax Lean All-In-One Protein Powder and Mutant Whey, scored on value, protein density, macros and ingredient quality so you don't have to guess which to buy.


What a scoop actually contains

MaxiNutrition Promax Lean All-In-One Protein Powder
123 kcal · 35 g scoopProtein is 81% of the scoop
- Protein
- 28.4 g
- (81%)
- Carbs
- 1.1 g
- (3%)
- Fat
- 0.6 g
- (2%)
- Other
- 5.0 g
- (14%)

Mutant Whey
143 kcal · 37 g scoopProtein is 59% of the scoop
- Protein
- 22.0 g
- (59%)
- Carbs
- 8.0 g
- (22%)
- Fat
- 2.5 g
- (7%)
- Other
- 4.5 g
- (12%)
WheyWise verdict
MaxiNutrition Promax Lean All-In-One Protein Powder wins for most buyers.
Runner-upPrefer Mutant Whey? It is the second pick here, not a bad one - and Amazon stocks it.
- Higher protein density than Mutant Whey per 100g
- All-in-one formula with added vitamins and minerals
- Informed Sport tested with long UK brand heritage
How the numbers stack up against the price
MaxiNutrition Promax Lean All-In-One Protein Powder and Mutant Whey represent two fundamentally different approaches to protein supplementation. MaxiNutrition Promax Lean All-In-One Protein Powder is a lean all-in-one formula from MaxiNutrition, one of the UK's longest-established sports nutrition brands, combining whey protein with added vitamins, minerals, and functional ingredients designed for body composition goals. Mutant Whey is a straightforward whey concentrate from the Canadian brand Mutant, known for its hardcore gym branding and no-frills approach. At 59g of protein per 100g, Mutant Whey sits well below the category average for whey concentrates, while MaxiNutrition Promax Lean All-In-One Protein Powder packs a higher protein density with a more complete nutritional profile.


Cost per 25g protein
Lower is better
Protein per scoop
Higher is better
Carbs per scoop
Lower is better
Fat per scoop
Lower is better
Protein density
Higher is better
WheyWise score
Out of 5
MaxiNutrition Promax Lean All-In-One Protein Powder wins this comparison on the metrics that matter.
The higher protein density means you get more protein per scoop, and the all-in-one formula means fewer separate supplements to buy. MaxiNutrition's long UK heritage and Informed Sport testing provide quality assurance that matters for serious trainers. Mutant Whey is let down by its below-average 59g protein per 100g - nearly 40% of the powder is filler rather than protein. Even if Mutant Whey appears cheaper on the sticker price, the lower protein concentration means you need more powder per serving to hit the same target. For UK buyers who want a complete, efficient protein supplement, MaxiNutrition Promax Lean All-In-One Protein Powder is the smarter investment.
Where each one wins

WheyWise pick
Takes protein per scoop, carbs per scoop, fat per scoop, protein density and the WheyWise score.

Cheaper per serving of protein
Takes cost per 25g protein.
Neither of these quite right?
Answer five questions about your goal, budget and diet, and the Protein Finder ranks the whole range against them, with the reason each pick won.