Last updated: 17/10/2022

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Casein is a protein found in milk. It makes up 80% of the proteins present in cow’s milk and can be extracted from it using acid, heat or enzymes. The process used to extract casein determines its quality as well as how much lactose (milk sugar) remains with it after processing.

Casein: Bestsellers and current offers in the UK

The best casein in the UK: Our selection

The Perfect Protein Shake

Looking for a trusted and quality protein shake that has been refreshed with a new formula? Look no further. This slow-digesting protein shake is fortified with zinc and magnesium to provide a prolonged source of protein for the growth and maintenance of muscle mass. Each serving contains 24 g of premium micellar casein protein, 10 g of naturally occurring essential amino acids, low fat content, and no added sugars. This is the perfect protein resource for athletes that play a range of competitive sports .

Build Muscle with New and Improved Protein Shake

Looking for a protein shake that will help you build muscle mass? Look no further than our new and improved formula, fortified with zinc and magnesium. Our slow-digesting protein shake provides a prolonged source of protein, perfect for athletes who play a range of competitive sports. Each serving contains 24g of premium micellar casein protein, 10g of naturally occurring essential amino acids, and is low fat and sugar free.

83% protein premium micellar casein powder

Looking for a slow-releasing protein to help you reach your fitness goals? Look no further than our premium micellar casein powder. With an impressive 83% protein content, it’s perfect for anyone looking to increase their intake. Our leading sports nutrition brand offers a wide range of delicious flavours and sizes, so you can find the perfect one for you. Note: packaging may vary for a limited period of time.

Casein: Frequently asked questions

What types of Casein are there and what determines a good product?

There are two types of Casein, Calcium caseinate and Sodium caseinate. The difference between the two is that one has a higher calcium content than sodium (Calcium) while the other contains more sodium than calcium (Sodium). Both forms have different uses in food production.

The quality of the Casein is determined by its purity and how it has been processed. A good casein will be free from any additives, fillers or other ingredients that are not related to milk protein. It should also have a high percentage of micellar caseins (70%+) which are responsible for most of the benefits associated with this type of protein powder.

Who should use a Casein?

Anyone who wants to build muscle and strength. Casein is a slow digesting protein that will keep your muscles fed with amino acids for up to 7 hours after you drink it, making it ideal as a pre-bedtime shake or post workout recovery supplement.

Based on what criteria should you buy a Casein?

You should buy a Casein if you are looking for an affordable, high quality case. It is not the most durable or protective option on this list but it will do the job and look great doing so.

The first thing to look out for is the protein content. It should be at least 80% and not more than 90%. This will ensure that you get a good casein supplement with high quality ingredients. Another important factor to consider is the taste of your Casein powder, as this can affect how well it mixes in water or milk. You may also want to check if there are any artificial flavours added so that you don’t end up consuming them unknowingly.

What are the advantages and disadvantages of a Casein?


Casein is a protein that is absorbed slowly into the bloodstream. This makes it ideal for use before bed, or any time you want to keep your body in anabolic (muscle-building) mode longer than usual. It also has a high level of glutamine and arginine which are important amino acids for muscle growth and recovery from intense training sessions.


Casein is a slow digesting protein, so it may not be the best choice if you are looking for something to take right before bed. It also tends to have less of an amino acid profile than whey or egg proteins.

Shopping Guide: Everything you need to know

Which brands and manufacturers are represented in our review?

In our review, we present products from various manufacturers and suppliers. The list includes products from the following brands and manufacturers, among others:

  • Optimum Nutrition
  • Optimum Nutrition
  • Bulk

What is the price range of the featured products?

The cheapest Casein in our review costs around 12 pounds and is ideal for customers who are conscious about their money. However, those who are willing to spend more money for better quality can also spend around 49 pounds for one of the more expensive products.