PhD Diet Whey vs MaxiNutrition Promax Lean.

How the numbers stack up against the price

PhD Nutrition PhD Diet Whey Protein Powder and MaxiNutrition Promax Lean Protein Powder are the two best-known purpose-built diet whey proteins on UK shelves, and the comparison matters because both are engineered for the same job: hitting a protein target inside a calorie deficit. PhD Nutrition PhD Diet Whey Protein Powder is the supermarket and Amazon mainstay, delivering 68g of protein per 100g from a whey blend with added CLA, green tea extract, and L-carnitine for fat metabolism support, at roughly 95 calories per 25g protein serving. MaxiNutrition Promax Lean Protein Powder fires back with a whey isolate plus calcium caseinate blend at around 72g of protein per 100g, layering in B-vitamins, green tea extract, caffeine, and L-carnitine as an all-in-one formula priced at the premium end of the diet category.

Promax Lean is the better formulation. PhD Diet Whey is the better buy. Which of those two sentences matters more is the whole decision.

PhD Nutrition PhD Diet Whey Protein Powder takes the edge for most UK buyers. The 1kg tub regularly drops to around £15 to £18 on Amazon UK and at Holland and Barrett, putting it 30 to 40% cheaper per 25g of protein than MaxiNutrition Promax Lean Protein Powder, which sits closer to £30 for the same size. Both products are honest about being diet wheys, both deliver low-calorie servings under 100 kcal, and the protein density gap (4g per 100g) is too small to matter when total daily intake is what drives fat loss. MaxiNutrition Promax Lean Protein Powder wins on a cleaner macro profile thanks to the isolate base, the added caffeine, and Informed Sport testing, which matter if you train fasted or compete in a tested federation. For everyone else, the price gap is the deciding factor: PhD Nutrition PhD Diet Whey Protein Powder is the better value pick for a 12 to 16 week summer cut.