Protein Works 100% Micellar Casein - BLACK Innovation
This is the cleanest label Protein Works publishes.
- Slow release
- 80g
- Protein / 100g
- 24g
- Per 30g scoop
- 82p
- Per 25g protein
- £104.99
- 4.00kg pack
Mixed on the numbers
Scored on the label and the price, not on how it tastes. How we score.
How the numbers stack up against the price
82p buys 25g of protein here, which makes it the 8th cheapest of the 18 powders we have reviewed, behind PER4M Nutrition Whey Protein at 75p, and 4p under the median.
Three ingredients, 80g of protein per 100g, and 0.1g of salt, which is a thirtieth of what their vegan blends carry. There is no soy anywhere on it, no vitamin premix and no thickener, which is unusual in a range built on adding things. At 82p per 25g of protein it costs more than their whey blends, but casein always does, and this is a fair price for a single-ingredient micellar casein. The 4g of sugar per 100g is the only figure worth noting, and it is small in a 30g scoop.
Cost per 25g of protein, across our 18 reviews
Median 86p
- Protein Works Vegan Pea Protein - BLACK Innovation39p
- Protein Works Vegan Protein 360 - GOLD Innovation44p
- Protein Works Vegan Protein 360 - PLATINUM Innovation54p
- Protein Works Whey Protein 360 - PLATINUM Innovation71p
- Protein Works Whey Protein 360 - GOLD Innovation72p
- PhD Nutrition Diet Whey73p
- PER4M Nutrition Whey Protein75p
- Protein Works 100% Micellar Casein - BLACK Innovation82p
- PER4M Nutrition Isolate Zero86p
- MyProtein Impact Whey Protein91p
- Scitec Nutrition 100% Whey Protein Professional93p
- USN Blue Lab Whey100p
- Applied Nutrition Critical Whey£1.12
- Applied Nutrition ISO XP£1.16
- Warrior Whey£1.19
- Protein Works Clear Diet Whey Protein - GOLD Innovation£1.37
- Protein Works Diet Whey Protein Isolate - BLACK Innovation£1.56
Cheapest in-stock listing at a partner retailer, for packs of 400g and over. NXT Nutrition Beef Protein Isolate has no partner listing in stock, so it carries no figure.
The whole ingredient list is micellar casein, flavouring and sucralose. No blend, no vitamin premix, no thickener, no emulsifier. Micellar casein gels in the stomach and digests slowly, which is the reason people buy it before bed rather than around training.
What the label gets right, and wrong
Strengths
- Three-item ingredient list: micellar casein, flavouring, sweetener
- 80g of protein per 100g
- 0.1g of salt per 100g, the lowest in the Protein Works range
- No soy, no added vitamin premix, no thickeners
Watch-outs
- 82p per 25g of protein, dearer than the brand’s whey blends
- 4g of sugar per 100g
- Casein is thick when mixed and is not to everyone’s taste
- No published third-party batch testing
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 |
|---|---|---|---|---|
| Protein Works | 4000g | £104.99 | 82p | View deal ↗ |
One partner retailer stocks a 400g or larger pack of this product.
Price history
How it scored
Four categories, each out of 25, every one taken from the label or the live partner price.
80g per 100g
82p per 25g protein
4g sugar, 1.5g fat per 100g
none found
What a scoop actually contains
Taken from the manufacturer’s published label. Source.
The page publishes 78g and 82g panels on other flavours. The panel here matches the 80g we hold from our own scrape.
| Nutrient | Per 100g | Per 30g |
|---|---|---|
| Protein | 80g | 24.0g |
| Energy | 355 kcal | 107 kcal |
| Carbohydrate | 5.7g | 1.7g |
| of which sugars | 4g | 1.2g |
| Fat | 1.5g | 0.5g |
| of which saturates | 0.9g | 0.3g |
| Fibre | 0.2g | 0.1g |
| Salt | 0.1g | 0.0g |
Ingredients and formulation
Protein sources, in label order
- 01Micellar casein (milk)
Sweeteners and emulsifier
Sucralose
Pack sizes
500g · 1kg · 2kg · 4kg
Flavoured versions add cocoa powder; the unflavoured is casein alone.
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.
No batch-testing claim is published for this product and we found none elsewhere.
Made by
Protein Works, produced at their own UK facility
What the maker does not publish
- Protein Works does not state the country of origin for the milk.
- We found no product-level buyer reviews we could attribute and link.
Questions buyers ask
The things people search for about Protein Works 100% Micellar Casein - BLACK Innovation, answered from the label and the live partner prices rather than from the brand’s own copy.
When should you take micellar casein?
It digests slowly, so the usual case is before bed or across a long gap between meals. Around training a faster protein makes more sense.
How much protein is in Protein Works Micellar Casein?
80g per 100g, or 24g in a 30g scoop.
Does Protein Works Micellar Casein contain soy?
No. The ingredient list is micellar casein, flavouring and sucralose, which makes it one of the few soy-free products in their range.
Reviewed next to
Protein Works
Whey Protein 360 - GOLD Innovation
Protein Works's other option, on a different protein base.
72p / 25g protein
Protein Works
Diet Whey Protein Isolate - BLACK Innovation
86g protein per 100g against 80g here, if density is what you are after.
£1.56 / 25g protein
Applied Nutrition
Critical Whey
The same job from Applied Nutrition, at a different price point.
£1.12 / 25g protein
Not sure this is the one?
Answer five questions and the Protein Finder narrows the whole range down to what fits your goal, budget and diet.
Last updated 20 August 2026