Quick answer
In the listings checked on 24 September 2026, Nutristore offered the reformulated Applied Nutrition Critical Whey 2kg for £44.95, about 77p per 25g of labelled protein. Myprotein listed 1kg Maple Syrup Impact Whey at £32.99, about £1.06 per 25g. Applied wins this price check, but only with a larger tub and a retailer sale.
The bag price hides a retailer deal
A £44.95 tub beside a £32.99 bag looks like the dearer purchase. The Applied Nutrition tub holds 2kg, though, while the Myprotein bag holds 1kg. Nutristore's sale price changes the cost-per-protein result dramatically. It is a retailer offer, not Applied Nutrition's usual direct price.
We used Applied Nutrition Critical Whey and Myprotein Impact Whey because both are everyday whey products. This is a product-to-product comparison, not a verdict on every isolate, clear whey and gainer either brand sells.
Live comparison
Myprotein and Applied Nutrition products
FlavourSize (g)QtyServingsOfferTotal Per 25g protein 43501125.3 £99.99 25.0g132£0.798 1000128.8 £25.99 25.0g127£0.902 50001146 £144.49 25.0g129£0.990 |
FlavourSize (g)QtyServingsOfferTotal Per 25g protein 2250163 £55.99 25.0g156£0.889 750121 £19.99 25.0g156£0.952 375110.8 £11.99 25.0g153£1.110 |
FlavourSize (g)QtyServingsOfferTotal Per 25g protein 1800157.6 £54.95 25.0g113£0.954 1000132 £32.95 25.0g113£1.030 450114.4 £19.95 25.0g113£1.385 |
FlavourSize (g)QtyServingsOfferTotal Per 25g protein 50001112 £107.99 25.0g151£0.964 2500154 £59.99 25.0g162£1.111 1000123.2 £28.49 25.0g155£1.228 |
FlavourSize (g)QtyServingsOfferTotal Per 25g protein 1000129.6 £34.49 25.0g128£1.165 |
FlavourSize (g)QtyServingsOfferTotal Per 25g protein 2000158.3 £68.95 25.0g135£1.182 825124.1 £33.95 25.0g135£1.411 450113.1 £19.95 25.0g135£1.520 |
FlavourSize (g)QtyServingsOfferTotal Per 25g protein 1020129.4 £44.99 25.0g127£1.532 |
FlavourSize (g)QtyServingsOfferTotal Per 25g protein 600115.8 £27.49 25.0g142£1.735 |
FlavourSize (g)QtyServingsOfferTotal Per 25g protein - £8.99 25.0g495- |
The September price check
Nutristore listed a 2kg tub of the reformulated Critical Whey for £44.95. Applied Nutrition's current formula lists 24g protein in a 33g serving, with about 61 servings in that tub. Myprotein listed 1kg Maple Syrup Impact Whey at £32.99, with 78g protein per 100g. That makes the Nutristore offer about 77p per 25g protein against £1.06 for Myprotein, before delivery.
Nutristore showed limited stock when checked, so this is a dated sale example rather than a standing brand ranking. Our whey comparison is the place to check the selected flavour, retailer and pack before buying.
What 25g of protein cost in this price check
24 September 2026, before delivery. Critical Whey uses a 2kg retailer sale; Impact Whey uses a 1kg direct listing.
Critical Whey · Nutristore
£0.77
£44.95 for 2kg; 24g protein in a 33g serving.
Impact Whey · Myprotein
£1.06
£32.99 for 1kg of Maple Syrup; 78g protein per 100g.
What is in each powder?
Critical Whey was reformulated: the current version combines whey concentrate, whey isolate, hydrolysed whey and milk protein concentrate. Its 24g serving is measured from 33g of powder, not the old 21g from 30g. Myprotein's Maple Syrup Impact Whey is concentrate-led and gives 20g protein in a 25g serving. That is a little more protein per 25g of powder than Critical Whey, but the Nutristore offer more than compensates on price here.
Applied identifies certain Critical Whey flavours as Informed-Sport tested and says the reformulated range is Informed Protein tested. Myprotein lists Informed Choice for Impact Whey. Check the exact flavour and pack if the testing programme matters to you.
Which would we buy?
At Nutristore's checked sale price, Critical Whey is the stronger value if you will finish 2kg and can get that stock. Impact Whey is the easier first purchase: less money upfront, more protein per 100g in the chosen flavour and far less powder to commit to. The same brand pair can give a different winner at another retailer or once delivery is included.
For the broader brand question, our Myprotein value guide looks beyond this pair. This article answers the narrower Critical Whey versus Impact Whey choice.
Cheapest Myprotein Whey
Impact Whey Protein Powder
MyProtein · 600g
Cons
- 18.3% dearer per 25g protein than the median of 65 other Whey Protein product families in this comparison
References
Sources and further reading
- 01Applied Nutrition, reformulated Critical Whey Protein
Current four-protein formula, 24g serving and testing information checked 24 September 2026.
- 02Nutristore, Applied Nutrition Critical Whey 2kg
Listed 2kg sale price and 61-serving product information checked 24 September 2026.
- 03Myprotein, Impact Whey Protein Maple Syrup
1kg direct price and flavour-specific nutrition checked 24 September 2026.
Frequently asked questions
Is Applied Nutrition Critical Whey cheaper than Myprotein Impact Whey?+
At Nutristore's 2kg sale price checked on 24 September 2026, Critical Whey was about 77p per 25g of labelled protein, against £1.06 for the 1kg Maple Syrup Impact Whey direct listing. Stock, delivery and other offers can change the result.
Is Critical Whey an isolate?+
No. The current Critical Whey formula blends whey concentrate, isolate, hydrolysed whey and milk protein concentrate.












