Applied Nutrition ISO XP
ISO XP is among the highest protein densities on the UK market at 90g per 100g, with carbohydrate and fat both under 1g per 100g.
- Cutting
- Lean macros
- Low lactose
- 90g
- Protein / 100g
- 22.5g
- Per 25g scoop
- £1.23
- Per 25g protein
- £44.26
- 1.00kg pack
How the numbers stack up against the price
£1.23 buys 25g of protein here, which makes it the 15th cheapest of the 24 powders we have reviewed, behind MyProtein Impact Whey Isolate at £1.23, and 13p over the median.
The ingredient list is four items long and uses sunflower rather than soy lecithin. The one claim we would not repeat without qualification is the Informed Sport badge several retailers display, because the product does not appear in the Informed Sport database.
Cost per 25g of protein, across our 24 reviews
Median £1.10
- Protein Works Whey Protein 360 - GOLD Innovation59p
- NXT Nutrition Beef Protein Isolate74p
- Applied Nutrition Critical Whey92p
- Bulk Pure Whey Protein97p
- MyProtein Impact Whey Protein£1.01
- PER4M Nutrition Whey Protein£1.03
- Protein Works Whey Protein 360 - PLATINUM Innovation£1.03
- USN Blue Lab Whey£1.05
- PhD Nutrition Diet Whey£1.10
- Scitec Nutrition 100% Whey Protein Professional£1.11
- PER4M Nutrition Isolate Zero£1.15
- Warrior Whey£1.16
- MyProtein Impact Diet Whey£1.21
- MyProtein Impact Whey Isolate£1.23
- Applied Nutrition ISO XP£1.23
- Bulk Pure Whey Isolate£1.30
- Bulk Clear Whey Isolate£1.48
Cheapest in-stock listing at a partner retailer, for packs of 400g and over. MyProtein Clear Whey Protein, Protein Works Vegan Protein 360 - GOLD Innovation, Protein Works Vegan Protein 360 - PLATINUM Innovation, Protein Works Vegan Pea Protein - BLACK Innovation, Protein Works 100% Micellar Casein - BLACK Innovation, Protein Works Diet Whey Protein Isolate - BLACK Innovation, Protein Works Clear Diet Whey Protein - GOLD Innovation have no partner listing in stock, so they carry no figure.
A single protein source, with no concentrate and no hydrolysate. The full ingredient list runs to four items, which is unusually short for this price band.
What the label gets right, and wrong
Strengths
- 90g of protein per 100g, the highest of any product in this first batch
- Under 1g of carbohydrate and under 1g of fat per 100g
- Four-ingredient label using sunflower lecithin rather than soy
- A 450g size exists, so the entry cost for an isolate is low
Watch-outs
- The Informed Sport badge shown by several retailers is not something we could verify in the Informed Sport public database
- Sucralose sweetened, with no unflavoured version we could find
- Isolates cost more per gram of protein than concentrates, and this one is no exception
Where to buy it
Ordered by cost per 25g of protein, because pack sizes and protein densities differ enough that a headline price on its own does not tell you which is better value.
| Retailer | Size | Price | Per 25g | Go to retailer |
|---|---|---|---|---|
| Amazon UK | 1000g | £44.26 | £1.23 | View deal ↗ |
One partner retailer stocks a 400g or larger pack of this product.
Price history
What a scoop actually contains
Taken from the manufacturer’s published label. Source.
Applied’s own product page rounds the serving to 22g. A vanilla panel published by another retailer reads 22.3g per 25g, so expect roughly 89 to 90g per 100g depending on flavour.
| Nutrient | Per 100g | Per 25g |
|---|---|---|
| Protein | 90g | 22.5g |
| Energy | 355 kcal | 89 kcal |
| Carbohydrate | 0.36g | 0.1g |
| of which sugars | 0.36g | 0.1g |
| Fat | 0.99g | 0.2g |
| of which saturates | 0.04g | 0.0g |
| Fibre | 0g | 0.0g |
| Salt | 0g | 0.0g |
Ingredients and formulation
Protein sources, in label order
- 01Whey protein isolate
Sweeteners and emulsifier
Sucralose
Sunflower lecithin
Marketed as soy free, which is genuinely uncommon at this price.
Pack sizes
450g · 850g · 1.8kg
Twelve flavours on the UK site.
Third-party testing
Certification is per programme and often per flavour or per batch, so a badge on one product does not carry across a brand’s whole range.
Several UK retailers display an Informed Sport badge on ISO XP, but we could not find an ISO XP entry in the Informed Sport public product database, and Applied’s own explainer names only three Critical Whey flavours as certified. Treat the badge as unconfirmed until Applied clarifies it.
Production site certifications rather than per-batch product testing.
SourceMade by
Applied Nutrition plc, Knowsley Industrial Park, Liverpool
What the maker does not publish
- Informed Sport certification is claimed by retailers but not findable in the public database.
- We found no independent flavour reviews of ISO XP at all, so we have nothing to tell you about how it tastes.
Questions buyers ask
The things people search for about Applied Nutrition ISO XP, answered from the label and the live partner prices rather than from the brand’s own copy.
How much protein is in Applied Nutrition ISO XP?
22.5g of protein in a 25g scoop, about 90g per 100g. That is isolate grade and among the highest available in the UK.
Is ISO XP soy free?
The ingredient list uses sunflower lecithin rather than soy lecithin. Always check the pack for the allergen statement, since that is what legally binds.
Is Applied Nutrition ISO XP Informed Sport tested?
Retailers display the badge, but we could not find ISO XP in the Informed Sport public product database as of August 2026, and Applied’s own explainer names only three Critical Whey flavours. If you compete in a tested sport, ask Applied for the batch certificate before buying.
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Last updated 19 August 2026