Protein · head-to-head
MyProtein Impact Whey Isolate vs Bulk Pure Whey Isolate.
Our independent head-to-head review of MyProtein Impact Whey Isolate Powder and Bulk Pure Whey Isolate, scored on value, protein density, macros and ingredient quality so you don't have to guess which to buy.
What a scoop actually contains
Protein is 82% of the scoop
- Protein
- 24.6 g
- (82%)
- Carbs
- 1.2 g
- (4%)
- Fat
- 0.5 g
- (2%)
- Other
- 3.6 g
- (12%)
Protein is 81% of the scoop
- Protein
- 24.3 g
- (81%)
- Carbs
- 0.6 g
- (2%)
- Fat
- 0.1 g
- (1%)
- Other
- 4.9 g
- (16%)
WheyWise verdict
Bulk Pure Whey Isolate wins for most buyers.
Runner-upPrefer MyProtein Impact Whey Isolate Powder? It is the second pick here, not a bad one.
- 84g protein per 100g - exceptional isolate purity
- Lower carbs and fat than competing isolates
- Honest pricing without inflated RRP games
How the numbers stack up against the price
MyProtein Impact Whey Isolate Powder and Bulk Pure Whey Isolate are the two cheapest whey isolates from major UK brands, making this the comparison that matters most if you want high protein with low lactose, fat, and carbs without paying a premium price. MyProtein Impact Whey Isolate Powder delivers 76g of protein per 100g from whey protein isolate, while Bulk Pure Whey Isolate pushes ahead with 84g of protein per 100g - a significant difference that means more protein per scoop and cleaner macros across the board.
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
Bulk Pure Whey Isolate takes this one.
The 84g protein per 100g is outstanding for a whey isolate at this price point - it means you are getting more actual protein per pound spent, which is the whole reason to buy isolate in the first place. MyProtein Impact Whey Isolate Powder is still a strong product and benefits from MyProtein's wider flavour range and more frequent sales, but on the metric that matters most for an isolate buyer - protein density per gram - Bulk delivers a measurably superior product.
Where each one wins
Cheaper per serving of protein
Takes cost per 25g protein, protein per scoop, protein density and the WheyWise score.
WheyWise pick
Takes carbs per scoop and fat per scoop.
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.