Applied Nutrition ISO XP
- Cutting
- Lean macros
- Low lactose
- 90g
- Protein / 100g
- 22.5g
- Per 25g scoop
- £1.16
- Per 25g protein
- £74.89
- 1800g pack
Our verdict
Scored on the label and the price, not on how it tastes.
- 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
- 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
Read the full verdict
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. 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.
Where to buy Applied Nutrition ISO XP
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 | |
|---|---|---|---|---|
| Amazon UK | 1800g | £74.89 | £1.16 | View deal |
How it scored
How we scoreFour categories, each out of 25, every one taken from the label or the live partner price.
90g per 100g
£1.16 per 25g protein
0.36g sugar, 0.99g fat per 100g
claimed, not found in the database
Nutrition
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
- 01Whey protein isolate
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.
Sucralose
Sunflower lecithin
Marketed as soy free, which is genuinely uncommon at this price.
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.
Alternatives worth a look
Frequently asked questions
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.
Answer four questions and we will rank the shortlist for you
The Protein Finder narrows the whole range down to what fits your goal, budget and diet.
Open the Protein FinderLast updated 19 August 2026