Xtreme Casein Ultimate Series
by Prozis
Slow-release recovery: a thick, satisfying shake that feeds your muscles over hours, not minutes.
- 75g protein per 100g
- Low fat - under 3g per 100g
- Slow-digesting - ideal before bed
- For shakes, smoothies, baking and more
Flavour pictures illustrate the taste, not the powder's colour or ingredients.
Best price today
In stock£45.83
£2.89 / 100g
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Transparent protein profile
What's inside
Values per 100g
75g protein
Solid protein content
11g carbohydrates
Carbohydrates per 100g of product
2g fat
Very lean profile
362 kcal
Energy per 100g of product
View full nutritional information
| Nutrient | Per 100g |
|---|---|
| Protein | 75g |
| Calories | 362 kcal |
| Carbohydrates | 11g |
| Fat | 2g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£2.54/100g (£50.82 for 2kg on 13 Oct 2026)
1.59kg · all flavours · price per pack
- Prozislatest £45.83 (one check so far)
Quick answers
Is this right for you?
Who is it for?
Prozis Xtreme Casein Ultimate Series is designed for people who want sustained protein release, especially overnight. Casein digests slowly, making it ideal as a bedtime shake or for anyone who goes long stretches between meals and wants to keep muscle protein synthesis ticking over.
What can you expect?
A thick, slow-digesting shake that keeps you feeling full for longer. Casein forms a gel in the stomach, releasing amino acids steadily over several hours. This makes it less ideal immediately post-workout but excellent for sustained recovery windows. With 75g of protein per 100g, Prozis Xtreme Casein Ultimate Series sits in a solid mid-range for a casein product.
What else do you need to know?
Prozis Xtreme Casein Ultimate Series is a casein protein powder made by Prozis. It comes in 1.59kg, 2kg 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 Prozis Xtreme Casein Ultimate Series in the UK?
The best price we have verified today is £2.54 per 100g for the 2kg bag, checked 13 Oct 2026. Use the buy button above to go straight to it.
How much protein does Xtreme Casein Ultimate Series contain per 100g?
Xtreme Casein Ultimate Series contains 75g of protein per 100g. It is a casein product.
Is Prozis Xtreme Casein Ultimate Series currently in stock?
At the last check, 3 out of 6 tracked variants were in stock. Stock status carries the same fetch time as the price shown above, so check the retailer listing before ordering.
Pick your pack
2 sizes · Chocolate · cost per 100g for each
The 2kg works out at £2.54 per 100g. The 1.59kg costs £2.89. Same powder, 1.1x the price per gram.
Where to buy in the UK
Chocolate · 1.59kg · 1 offer for this selection · sorted by cost per 100g
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