15 Best Casein Protein Powders of 2022

best casein protein powders

Are you after the best casein protein powder in the UK? We have you covered!

We’ve done all the hard work for you in this article. We’ve tried and tested out all of the protein products down below so you don’t have to spend hours reading casein protein reviews online! 

But before we go straight into the article, if you wanted to find out more about protein and how it works within the body. Take a look at our Nutrition Course and download and read our prospectus to help you decide! 

So what is casein protein powder? 

Derived from dairy, casein is a slow-digesting protein that people often take as a supplement. 

It releases amino acids slowly so a lot of people choose to take casein powder at night to help recovery and to reduce any muscle breakdown while they sleep.

Very soon we have covered the very best casein protein powders, but first, we have answered a few questions asked by people all about this protein powder so we hope this helps you out!

What's the difference between casein and whey protein?

Milk contains two proteins, milk protein casein which is 80% of the milk protein and whey, which makes up 20%. Casein is digested slowly whilst whey is digested quickly.

An important difference between casein protein and whey protein is how fast our bodies release these proteins into our system to be used by our muscles.

What's casein protein good for?

There is a whole range of benefits to buying high-quality casein protein powder. 

You will have better muscle retention, much greater fat loss, and generally a higher/purer grade of protein when you incorporate it into your diet. 

There are quite a few casein protein benefits but we’ll go further in detail with those later in this article. 

What is micellar casein protein powder?

We have actually listed a few micellar products down below so we thought it’s best to explain to make it easier to understand the wonderful yet confusing world of protein! 

So micellar casein is actually the by-product of cheese making and it’s the purest form of casein you can actually buy. 

There are other casein supplements such as calcium caseinate and hydrolyzed casein which are made through different processes and out of all the casein powders you can buy online, micellar casein is the slowest form when it comes to digestion and has many benefits as mentioned earlier!

So those are just a few questions people have often asked us, now, let’s find out where to buy casein protein powder?

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1. Gold Standard Optimum Nutrition Casein Protein

Price: £43.38

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Suitable for vegetarians, the Gold Standard 100% uses 100% micellar casein protein which is a slow-release dairy protein.

Ideal for supporting muscle repair and growth while you sleep, micellar casein is released steadily by the body for a drip-feed supply of amino acids overnight.

Each casein protein drink is made with Gold Standard has 24g of protein or half the daily recommended intake of protein for an adult male per day and for us, this is the best tasting casein protein powder you can buy online. 

Casein proteins are acid sensitive and thicken in the stomach, taking twice as long to be broken down, up to 6 hours, compared to whey proteins. Casein powder is best in the evening before bed to support muscle recovery overnight. 

Gold Standard 100% Casein uses the best casein protein as it is fortified with zinc for a healthy immune system. It also includes magnesium to support the synthesis of new proteins.

The Gold Standard Casein Protein also has 10g of naturally occurring essential amino acids per serving and this scoop can all be easily mixed in a protein shaker. 

EAAs are amino acids our body cannot synthesise and which must be consumed in the diet for optimum muscle repair and growth. The best tasting case Gold Standard 100% Casein is also aminogen-enhanced. 

Aminogen is a protein-digesting enzyme that aids in the digestion of the protein, eliminating bloating and constipation.

A top rated casein protein powder, the Gold Standard 100% Casein is available in 'Banana Cream', 'Chocolate Supreme', 'Cookie & Cream', 'Creamy Vanilla', and 'Strawberry Cream'. 

Each casein protein shake made with Gold Standard (one scoop of 32g) contains 120 calories, 1g fat, 0g sugar, and 24g protein.


2. My Protein Casein Powder

Price: £28.97

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From the World's No.1 Online Sports Nutrition Brand, the MyProtein Slow-Release Casein is a night-time protein shake to provide a sustained supply of protein between meals or whilst resting. 

It might not be a meal replacement shake but it’s the best casein protein powder for weight loss due to the great returns from drinking this shake. 

Each serving, depending on which flavour you choose, packs roughly 25g of slow-release protein, 105 calories, 0.2g of saturated fat, and 1.4g of sugar.

At 91% casein protein powder, MyProtein Slow-Release uses a maximum of 5 ingredients per powder, and their 'Unflavoured' option is 100% casein.

If you’re looking for the best rated casein protein powder that’s available from a trusted brand, then look no further! 

The MyProtein Slow-Release is an all natural casein protein powder which uses natural flavourings and sucralose as a sweetener.

Each shake provides a complete amino acid profile with essential amino acids; everything you need for muscle repair and recovery in a single scoop.

One of the best-tasting casein protein powders, MyProtein Slow-Release Casein comes in three flavour classics, 'Chocolate', 'Strawberry', and 'Vanilla'. 

If you're concerned about sweeteners and artificial ingredients, MyProtein offers an 'Unflavoured' version of this slow-release protein powder casein, allowing you to add your own flavouring or disguise your protein entirely in shakes and smoothies. 

Pro-tip, if you want to drink your casein shake straight add stevia, mix with warm water and leave for 10-20 minutes to bind. Another way of getting your protein up is by eating bars or even protein popcorn! 

Suitable for vegetarians and gluten-free, MyProtein Slow-Release Casein is the best casein protein shake and from one of the most popular brands, you definitely can’t go wrong. 

The slow-release milk-based protein provides a sustained supply of amino acids for roughly seven to eight hours without feeding so if you’re looking for the best casein protein for weight loss, this is what you’ve been looking for. 

3. Eko Pura Organic Casein Protein

Price: £24.00

organic casein protein powder

Unfortunately, as casein is the main protein component of milk, there is no such thing as true vegan casein protein or lactose free casein protein powder. However, for anybody who isn’t vegan but favours an organic or vegetarian diet, this option from Eko Pura is the perfect choice.

If you are vegan or you follow a plant based diet, there are plenty of other vegan protein sources to choose from.

This organic casein protein powder contains 78% protein, meaning that it works to gradually improve your protein absorption whether you take it for breakfast, as a snack, or before you go to bed. 

At only 88 calories per serving, this protein powder is a great way to get your protein fix whilst sticking to a healthy diet or nutrition plan.

We loved that this product has a neutral taste so that it can be used with pretty much any shake or smoothie, and can even be added into baked goods!

Wondering what makes this product organic? According to the Eko Pura website, all of their casein comes from organic grass-fed cows.

In terms of this product's nutritional value, this product has a full amino acid profile and is completely free from GMOs, Preservatives, and Soy. It includes no added sugars, artificial flavours, or colourants, but still has all of the benefits for building muscle and stimulating recovery.

4. BULK POWDERS Cheap Casein Protein Powder

Price: £17.24

Where to get casein protein

Bulk Powders Complete Bedtime is one of the best brands around whilst also providing some of the cheapest casein protein powder available. 

Bulk Powders formula has been designed for night-time consumption and provides 30g of protein per serving.

Bulk Powders Complete Bedtime also contains 3g of 100% pure L-Leucine per serving, L-Leucine has dramatic effects for increasing strength, preventing muscle fatigue and soreness, and decreasing body fat. 

If you’re on the hunt for the best casein protein powder for weight loss, then this is the perfect product for you!

Bulk Powders Complete Bedtime provides a 1.5g dose of HMB or Beta-hydroxy-beta-methyl butyrate per serving. 

HMB is made in the body from leucine and slows the breakdown of protein by the body, meaning it can contribute to muscle preservation overnight.

This relatively cheap casein protein has 250mg of theanine per serving, a tea extract which can promote a good night's sleep and 1g of lysine per serving. Lysine is an essential amino acid which can speed up recovery from injury and helps build muscle. 

Each shake contains 500mg of Tryptophan per serving for boosting serotonin and mood, decreasing anxiety, and contributing to a great night's sleep.

Each serving is rich in BCAAs for muscle growth and improved performance and has added glutamine to reduce post-workout soreness. 

Due to its affordable price, you can buy it as a bulk casein protein powder and purchase multiple flavours, Bulk Powders incorporate each ingredient in their shakes at research-proven doses and each serving of this casein protein drink has around 127 calories per 35g serving, less than 1g of fat, and under 1g of carbohydrates.

5. The Protein Works Casein Protein Supplement

Price: £24.99 

where can I buy casein protein

Amazon's Choice for a "Slow Release Casein Powder'' with 4 stars from almost 200 ratings, The Protein Works 100% Micellar Casein has an ultra-fine formulation for easy mixing into smoothies, morning porridge oats, home baking, and shakes.

Established in 2012, The Protein Works are specialists in premium grade, innovative sports nutrition products most especially casein and whey protein powders which all includes high-quality amino acids.

From a humble beginning in Cheshire, UK, The Protein Works has the best casein protein for women and men from around the world today! You may have heard of The Protein Works from our previous running supplements article as well. 

Their 100% Micellar Casein is made using only the best, 100% premium grade ingredients, and each 30g serving contains 99 calories, 0.4g of fat, 0.6g of sugar, and 24g of casein milk-based protein to boost muscle growth by up to 22% when taken before bedtime. 

Not only is it wheat-free, vegetarian, and gluten-free, but The Protein Works 100% Micellar Casein comes in 'Choc Mint Brownie', 'Chocolate Silk', 'Strawberries 'N Cream', 'Banana Smooth', and 'Vanilla Creme'. 

One of the best rated casein protein powders, The Protein Works 100% Casein is a great choice to sustain muscle growth and recovery overnight allowing you to wake up ready for optimal performance.

6. Pure: Casein Protein For Women and Men

Price: £19.99

What does casein protein do

Packed with BCAAs, our muscles' building blocks, ‘Pure’ from Bodybuilding Warehouse uses premium UK sourced casein from grass-fed cows. 

Bodybuilding Warehouse has a company aim of bringing to their consumer only the best European sourced ingredients believing the better the ingredients, the better the results making it the best casein protein powder you can find online.

Each scoop packs around 20g of protein, less than 0.3g of fat, and 3.3g of carbohydrate. Each scoop can be made up with water or milk and comes in 5 dessert flavours 'Strawberry', 'Caramel Biscuit', 'Millionaire Shortcake', 'Vanilla', and 'Chocolate'.

Each serving contains less than 1% soy and Pure Casein Protein Powder is available in 500g, 1kg, and 5kg.

This is a straightforward casein shake without any of the latest trending supplements.

This is all UK sourced, the ingredients include premium casein with a complete profile of slow-release amino acids, Pure Casein Protein Powder is a great option for 24-hour optimised supplementation throughout the day or night.

7. Weider Day & Night Vanilla Casein Protein Powder 

Price: £67.99

casein protein powders

Next on our list of the best casein shakes on the market is a product by Weider.

Weider is a brand that is on a mission to provide physically active adults with the best quality products that promote good health and strength. 

The vanilla casein protein powder consists of essential nutrients and amino acids to aid muscle growth and maintenance. 

A single shake of Day & Night offers up to 32g of high-quality protein when mixed with 1.5% fat of milk. 

Plus, each shake contains less than 0.5g of fat and a mere 0.8g of carbohydrates, totalling just 92 calories per shake.

For these reasons, Weider’s casein protein powders are favoured amongst athletes and fitness enthusiasts.

For optimal results, Weider suggests consuming their powder either for breakfast, post-training or before bed.

best casein protein powder

Now, while the price tag on Weider’s range might seem a little off putting, each purchase offers 1.8kg (4 lbs) of powder equating to 72 portions.

This works out at a mere 94p per serving! 

Weider also offers their casein powder in ‘Chocolate Cream’ and ‘Red Berry’ flavours which helps to keep your protein shakes varied and interesting. 

So, if you’d like to get your hands on good casein protein powders, Weider is a brand that we would suggest considering. 

After all, Weider’s range has an average of 4.7 out of 5 stars on Amazon and so is a brand that you can rely on when searching for your protein fix.

8. NOW Foods Natural Casein Protein

Price: £37.34

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This is a simple, non-GMO and with top-quality ingredients, NOW Foods Instantized Casein is one of the best casein proteins for females or males with 19 grams of protein and over 4,500 milligrams of branched-chain amino acids per serving. 

Available unflavoured, each serving has 10mg of cholesterol, 90 calories, 0g of saturated fats,  less than 1g of total carbohydrates, and is soy, nut, corn, and egg-free.

Informed-Choice and Informed-Sport certified, NOW Foods Instantized Micellar Casein is manufactured using the highest quality processing. 

This is a good casein powder which contains only two ingredients: casein and sunflower lecithin, to reduce clumping for super smooth smoothies, shakes, and bakes.

Each serving of Now Foods Instantized Micellar Casein packs 25% of the daily recommended intake of calcium plus all 9 essential amino acids and 9 non-essential amino acids.

#9 - Genetic Natural Casein Protein Powder 

Price: £28.99

bio casein powder

Genetic’s bio-casein is designed for those who want real results. 

It is formulated with micellar casein to enhance athletic performance, and is engineered with slow-release casein and essential amino acids to prevent muscle degradation. 

The protein powder’s formula is designed to support the nutritional needs for muscle growth in athletes. 

Each 30g serving can replenish the body with 100% natural, essential whey isolate. 

If you’re someone who is after organic whey protein that comes in a range of flavours, you’re in luck! 

casein powder for bodybuilding

Genetic offers the following 3 indulgent flavours:

  • Chocolate
  • Strawberry
  • Toffee Fudge

Moreover, Genetic’s supplements have additional benefits that other casein powders don’t have.

Genetic’s powders contain DigeZyme, a complex protein formula that helps to ease digestion and uncomfortable bloating. 

This helps consumers to focus on the fundamentals - working hard and beating personal bests.

Plus, priced at £28.99 for 1.14kg, this is one of the best cheap casein protein powders on the market and one you ought to consider if you’re serious about achieving your health and fitness goals.

10. Matrix Nutrition Top Casein Protein

Price: £29.99

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Available in chocolate, strawberry, and vanilla casein protein powder, the Matrix Nutrition powder packs 31g of micellar casein protein per serving plus an anabolic blend of glutamine and ZMA.

ZMA, or zinc magnesium aspartate, reduces cortisol levels whilst promoting anabolic (muscle building) hormones, making Matrix Nutrition Micellar Casein a great choice for sustaining protein levels during long periods without eating. 

Designed for post-workout and night time consumption, Matrix Nutrition uses a protein blend of micellar casein isolate protein powder, milk protein isolate, and soy protein isolate. 

Each serving contains around 180 calories depending on which flavour you choose, 6.4g of total carbohydrate, 3.2g of which are sugars and 1.1g of saturated fats. 

Matrix Micellar promises a steady delivery of amino acids to recover muscles for up to 7 hours, it’s one of the best casein protein options for women or men who want to optimise their 24-hour supplementation window.

11. Grenade Hydra 6 Whey and Casein Protein Powder

Price: £49.71

why take casein protein

If you’re looking for the best whey and casein protein blend then the Grenade Hydra 6 is the one for you! It’s a 50/50 ratio of whey protein isolate, for fast-release amino acids, and ultrafiltered micellar powder, for slow-release amino acids.

A great casein shake for breakfast, the Grenade Hydra 6 is Informed Sport approved and accredited meaning it has been manufactured to the highest standards and checked for banned substances. 

Some research has suggested taking a combination of whey and casein protein blend is more effective than taking either in isolation, as the combination fuels your body for both hard-training and periods of recovery. 

Grenade recommends 3-4 daily servings over a minimum of six weeks to see and feel results. Combine the whey and casein blend protein powder with an energy bar from Grenade and you’ll definitely see the results! 

Each serving of Grenade Hydra 6 contains 24g of protein, 12g from whey isolate and another 12g of micellar casein, 5g of BCAAs for essential building blocks, and 2.3g of leucine for the growth and repair of muscle, skin and bone. 

No wonder why people say it’s the best whey and casein protein powder you can buy online today! 

Available in 'Chocolate Charge', 'Cookie Chaos', 'Killa Vanilla', 'Peanut Nutter', and 'Strawberry Siege', Grenade Hydra 6 offers the option of not having to buy two separate protein powders with fast-acting whey isolate for pre-training muscle fuel, and micellar for sustained amino acid release over periods of up to 8 hours without supplementation.

12. USN Casein Protein Powder For Women and Men

Price: £32.98

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From USN UK, a leading brand in sports nutrition, this casein protein supplement uses ultra-premium micellar plus Aminogen to eliminate bloating and cramps. 

As well as eliminating the uncomfortable side effects sometimes associated with protein shakes, Aminogen may increase Branched Chain Amino Acid (BCAA) absorption for maximising muscle gains and promoting post-workout muscle recovery. 

This is a top casein protein powder and it’s packed with magnesium for protein synthesis, promises eight hours of sustained protein release, and each serving packs 24g of protein, 0.3g of fat, under 2g of sugar, and has only 105 calories. 

USN Casein Night Time Protein is available in strawberry and vanilla and is great as a pre-bedtime snack for anyone searching for a supplement to optimise their 24-hour supplementation clock.

13. PINK SUN Organic Casein Protein Powder

Price: £24.75

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Using casein which has been certified organic by the Soil Association and derived from grass-fed cow's milk, Pink Sun Organic Casein Protein is 100% soy-free, hormone-free, non-GMO, and uses no added sugars or sweeteners. 

17% of each serving of Pink Sun Organic is made up of Branch Chain Amino Acids (BCAA’s) plus naturally occurring minerals such as calcium, potassium, magnesium, sodium, and phosphorus.

Organic micellar casein is considered a wholefood, with a complete profile of amino acids Pink Sun Organic, is made up of 80% bioactive protein with an ingredient list of 100% Organic micellar casein and nothing else.

Naturally rich in BCAAs such as glutamic acid, leucine, threonine, and tryptophan, each 30g serving contains only 106 calories and packs 22g of protein, 0.6g of fat and only 2.2g of total carbohydrate. Suitable for vegetarians, the Pink Sun Organic Casein is available unflavoured and uses Europe sourced casein produced via cold-processed ultrafiltration.

A brilliant option for nutrition advocates after organic casein protein powder. There are no artificial flavourings and only naturally sourced ingredients.

If natural and organic foods are what you’re going for on your fitness journey, then superfruits are a must in your diet as well!

Pink Sun Organic casein protein powder dissolves to a thick, creamy consistency perfect for wholefood smoothies, desserts, and shakes.

14. Scitec Casein Isolate Protein Powder

Price: £58.25

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High in BCAAs and L-Glutamine, Scitec Nutrition 100% Casein contains all 9 essential amino acids including leucine and tryptophan, plus added L-Glutamine and taurine for muscle protection, it helps improve performance and a healthy metabolism.

Available in 'Belgian Chocolate', 'Maracuja White Chocolate', and 'Cantaloupe White Chocolate', each 30g serving has 106 calories, 22g of casein protein, 2.8g of total carbohydrate, and 0.7g of total fat. 

Scitec Nutrition 100% Casein also includes 200mg of L-Glutamine per serving for protein synthesis and muscle building, 200mg of taurine, and a 24g digestive enzyme blend to prevent bloating and cramping. 

Scitec Nutrition 100% Casein is a good casein protein powder for slow-release amino acids plus L-Glutamine and taurine supplementation.

#15 - Bulk Unflavoured Casein Powder

protein powders with casein

Price: £14.99

If unflavoured casein powders are preferable, we have a great option for you.

Bulk Powders is a nutrition and supplement brand that has been supplying top-quality products to gym enthusiasts and athletes since 2006. 

One of their best-sellers is their unflavoured casein powder that packs an incredible 83% protein content made from ultra-filtered skimmed milk. 

This is a great slow-releasing protein source that is perfect for mixing with other protein supplements like whey or pea protein. 

Each 30g serving contains:

  • 26g of protein
  • 0.9g carbohydrates
  • 111 calories

Bulk suggests consuming their casein protein powders either as a daytime snack or before bed.

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Now, when shopping around for the best cheap casein protein to enhance your fitness regime, reviews may influence which you go for.

Over on Bulk’s website, the range has been awarded an average of 4.5 out of 5 stars.

Many reviewers note how Bulk’s unflavoured casein protein is incredible value for money in addition to many saying that they’d recommend the range to a friend. 

Bulk, therefore, is a nutrition and supplement brand that you can trust and one we can confidently say will help facilitate your health and fitness goals. 

Before you go!

We hope you found the best casein protein powder for you! 

As mentioned before, in order to get the results you want from casein, it’s best to take it at night time so your body can receive the full benefit of it as you sleep. 

So there you have it, the 15 best rated casein protein powders you can find online, we hope we have definitely narrowed your search from the thousands of products out there. 

If this article has inspired you to jump into a career in fitness, take a look at our personal trainer hub page and decide what career path you want to go down! If you want further information about the courses we do, download our free prospectus!

Written by Zac Yeo

Fitness Content Executive, OriGym

Join Zac on Facebook at the OriGym Facebook Group

With a BA (Hons) Politics and International Relations from Kingston University and previous experience working in the finance sector, Zac’s passion for fitness brought him to OriGym, and ultimately led him to become a qualified Personal Trainer and Nutrition Specialist. With a keen interest in developing consumer trends, Zac enjoys the creation of deep, insightful content catering to new trends and has contributed to various publications including the Daily Star. Outside of work, Zac can be found watching football, either in-person supporting Charlton Athletic or virtually on Fifa.

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