Iso-9
by Naughty Boy
A quality protein powder designed to help you hit your daily protein targets alongside a balanced diet.
- Up to 27g protein per serving
- Low fat - under 3g per 100g
- Low carb - suitable for keto and cutting diets
- For shakes, smoothies, baking and more
Size900g
Best price
Awaiting restock£38.99
£4.33 / 100g
Secure retailer checkout
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Transparent protein profile
What's inside
Values per 100g, with the amount in one 30g serving
90g protein
27g per 30g serving with minimal filler
1g carbohydrates
Extremely low carbs - suitable for keto and low-carb diets
1g fat
0.3g per 30g serving - very lean
367 kcal
110 kcal per 30g serving
View full nutritional information
| Nutrient | Per 100g | Per serving (30g) |
|---|---|---|
| Protein | 90g | 27g |
| Calories | 367 kcal | 110 kcal |
| Carbohydrates | 1g | 0.3g |
| Fat | 1g | 0.3g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£4.33/100g (£38.99 for 900g on 18 Aug 2026)
900g · all flavours · price per pack
- Amazon UKlatest £38.99, lowest £38.99, highest £38.99 in the last 90 days
Quick answers
Is this right for you?
Who is it for?
Naughty Boy Iso-9 is designed for anyone looking to increase their daily protein intake. It provides a convenient way to hit your protein targets alongside a balanced diet.
What can you expect?
A quality protein powder that supports your training and recovery goals. Each serving delivers a measured dose of protein to help with muscle repair and growth. With 90g of protein per 100g (around 27g per 30g serving), Naughty Boy Iso-9 sits at the higher end for a protein blend product.
What else do you need to know?
Naughty Boy Iso-9 is a protein blend protein powder made by Naughty Boy. It comes in 900g sizes. Every price on WheyWise is read from the retailer’s own page and re-checked daily and sorted by cost per 100g, so you can see both the cheapest option and how current it is. All links to Amazon and retailer sites are affiliate links - this is how WheyWise stays free.
Frequently asked questions
Where is the cheapest place to buy Naughty Boy Iso-9 in the UK?
We refresh Naughty Boy Iso-9 pricing daily from Amazon UK and show the fetch time next to every figure. If no verified price is showing above, we do not currently hold one we would stand behind, and the buy button will take you to the live listing to check.
How much protein does Iso-9 contain per 100g?
Iso-9 contains 90g of protein per 100g, with 27g per 30g serving. It is a protein blend product.
Is Naughty Boy Iso-9 currently in stock?
At the last check, 0 out of 1 tracked variants were in stock. Stock status carries the same fetch time as the price shown above, so check the retailer listing before ordering.