Prime Casein

by Prozis

Slow-release recovery: a thick, satisfying shake that feeds your muscles over hours, not minutes.

Up to 25g protein per serving
Slow-digesting - ideal before bed
For shakes, smoothies, baking and more

Choose flavour2 flavours

Flavour pictures illustrate the taste, not the powder's colour or ingredients.

Size1kg

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In stock

£27.95

£2.79 / 100g

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Transparent protein profile

What's inside

Values per 100g, with the amount in one 30g serving

82g protein

24.6g per 30g serving with minimal filler

5g carbohydrates

1.6g per 30g serving - low carb

4g fat

1.1g per 30g serving - moderate fat

381 kcal

114 kcal per 30g serving

View full nutritional information

Nutrition per 100g and per 30g serving
Nutrient	Per 100g	Per serving (30g)
Protein	82g	24.6g
Calories	381 kcal	114 kcal
Carbohydrates	5.2g	1.6g
Fat	3.6g	1.1g

Know when to buy

Price history

Lowest price on record, any flavour or size

£2.79/100g (£27.95 for 1kg on 13 Oct 2026)

1kg · all flavours · price per pack

Prozislatest £27.95 (one check so far)

Quick answers

Is this right for you?

Who is it for?

Prozis Prime Casein 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 82g of protein per 100g (around 25g per 30g serving), Prozis Prime Casein sits at the higher end for a casein product.

What else do you need to know?

Prozis Prime Casein is a casein protein powder made by Prozis. It comes in 1kg 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 Prime Casein in the UK?

The best price we have verified today is £2.79 per 100g for the 1kg bag, checked 13 Oct 2026. Use the buy button above to go straight to it.

How much protein does Prime Casein contain per 100g?

Prime Casein contains 82g of protein per 100g, with 24.6g per 30g serving. It is a casein product.

Is Prozis Prime Casein currently in stock?

At the last check, 2 out of 2 tracked variants were in stock. Stock status carries the same fetch time as the price shown above, so check the retailer listing before ordering.