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.

MaxiNutrition

Promax Lean All-In-One Protein Powder

£1.40 / 25g protein

81g protein / 100g

MaxiNutrition Promax Lean All-In-One Protein Powder

Mutant

Whey

75p / 25g protein

59g protein / 100g

Mutant Whey

What a scoop actually contains

MaxiNutrition Promax Lean All-In-One Protein Powder

123 kcal · 35 g scoop

Protein 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 scoop

Protein 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

MaxiNutrition Promax Lean All-In-One Protein Powder£1.40
Mutant Whey75pWins

Protein per scoop

Higher is better

MaxiNutrition Promax Lean All-In-One Protein Powder28.4 gWins
Mutant Whey22.0 g

Carbs per scoop

Lower is better

MaxiNutrition Promax Lean All-In-One Protein Powder1.1 gWins
Mutant Whey8.0 g

Fat per scoop

Lower is better

MaxiNutrition Promax Lean All-In-One Protein Powder0.6 gWins
Mutant Whey2.5 g

Protein density

Higher is better

MaxiNutrition Promax Lean All-In-One Protein Powder81 g/100gWins
Mutant Whey59 g/100g

WheyWise score

Out of 5

MaxiNutrition Promax Lean All-In-One Protein Powder3.7Wins
Mutant Whey2.6

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

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

Cheaper per serving of protein

Mutant Whey

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.

Open the Protein Finder