Organic Casein Protein Isolate
Organic Casein Protein Isolate
"Absolutely love your casein" - Ki, Organic Casein Isolate customer 💬 5 answered questions

This product is now discontinued.

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This product is now discontinued.

Organic Casein Protein   Isolate

The first and only organic micellar casein protein isolate in the UK. It is made by filtering fresh organic grass fed milk from cows grazing on pastures in Denmark. As you would expect, we don’t use any additives at all, so this is just a pure quality organic casein protein with nothing else added at all.

Main benefits

  • 85g protein per 100g / 21.25g protein per 25g serving
  • Slow to digest, providing a steady supply of protein over several hours, perfect for taking before bedtime or between meals
  • Contains all the essential and branched chain amino acids
  • Emulsifier free, hormone free, gluten free, soya free and GMO free
  • Made in Denmark by filtering fresh organic milk twice at low temperatures, from cows grazing in the Danish countryside
  • Independent nutritional test certificates published for every batch
  • It is absolutely packed with minerals:
    - 593mg (74.1% RI) of calcium per 25g serving
    - 248mg (66.1% RI) of magnesium per 25g serving
    - 380mg (54.29% RI) of phosphorus per 25g serving
  • Completely flavourless, making it a very versatile ingredient
  • Suitable for vegetarians
  • Certified Organic by The Organic Food Federation
  • 25p donated to Compassion in World Farming for every pack, to help support an amazing team of people who are working tirelessly to bring an end to factory farming globally, one milestone at a time (of which there have been many). So far we've donated more than £30,000

Who is it for?

This is a protein powder anyone can use, regardless of what your goals may be. People often use our organic casein protein isolate for the following reasons:

  • Supporting a healthy active lifestyle
  • To help keep going during times of physical stress
  • Increased need for protein as a result of medical issues
  • Lacking protein from other foods due to dietary restrictions
  • Some people just enjoy the taste and find the benefits to be a bonus

How is this different to whey protein?

Whey protein is rapidly digested and quickly absorbed by our muscles, just one of many reasons it is the best protein source around. However, if you are looking to provide a steady slow supply of protein to your muslces during the night, or even between meals, then casein is actually a better option as it is digested slowly over several hours. Both are great protein sources, but each is useful in different situations.


Organic casein protein isolate, from organic grass fed cow's milk.

Serving guidance

The easiest way to use our organic casein protein isolate is to mix 25g with 200-200ml of water or milk (dairy or plant based) vigorously in a shaker for 30 seconds, or for 10 seconds in a blender.

25g is equivalent to approximately 60ml, which is equal to ¼ cup, 3.5 tablespoons, 2 scoops, or of course you can also weigh on a set of kitchen scales for the best accuracy. Many people only have half a serving (so around 12.5g or 30ml) as they don't need a lot of extra protein in their diet, so feel free to use less if this sounds like you.

Nutritional information

Typical ValuesPer 100gPer 25g Serving
Energy kJ/kcal1499/353375/88.3
of which saturates0.5g0.13g
of which sugars2g0.5g
Calcium2.37g593mg (74.1% RI)
Magnesium992mg248mg (66.1% RI)
Phosphorus1.52g380mg (54.29% RI)

RI = Reference intake of an average adult (8400 kJ/2000 kcal)

You can download the latest independent lab test certificate here.

Amino acids

Our organic casein protein isolate contains all of the essential and branched chain amino acids (BCAAs) naturally occurring in the milk.

Amino Acid Per 100g Per 25g Serving
Alanine 3.2g 800mg
Arginine 3.7g 925mg
Aspartic Acid 7.4g 1.85g
Cystine 0.5g 125mg
Glutamic Acid 22.5g 5.63g
Glycine 1.9g 475mg
Histidine 2.9g 725mg
Isoleucine* 5.1g 1.28g
Leucine* 9.6g 2.4g
Lysine 8.2g 2.05g
Methionine 3.0g 750mg
Phenylalanine 5.1g 1.28g
Proline 10.1g 2.53g
Serine 6.1g 1.53g
Threonine 4.5g 1.13g
Tryptophan 1.3g 325mg
Tyrosine 5.5g 1.38g
Valine* 6.6g 1.65g

* Branched Chain Amino Acids (BCAAs)

We offer free delivery on all orders in the UK with no minimum spend, and free international delivery if you spend £100 or more.

Orders placed up until 3.30pm are sent out on the same day between Monday-Friday (excluding Bank Holidays).

Free UK delivery

Delivery option Spend less than £80 Spend £80 or more
Royal Mail Tracked 48 Free Free
Royal Mail Tracked 24 £3.50 Free
DPD Next Day £4.50 Free

International delivery

Service Spend less than £100 Spend £100 or more
DHL (5-10 Days)  £12.00 Free

International orders are dispatched on Wednesdays only.

We are currently shipping to Europe, USA, Canada, Australia, New Zealand, United Arab Emirates, Saudi Arabia and Singapore.

Free UK returns

We are more than happy to issue a refund in the unlikely event that you aren't satisfied with your purchase, provided there are no more than 3 servings (75g) missing from the pack. You have up to 90 days to return your order, starting from the date it was delivered to your address. Once we've received your order, we will issue your refund within 48 hours.

Here are the steps to return your order, for free:

  • Head over to the Royal Mail returns page.
  • Select the item shape, then select “yes” if the item dimensions are smaller than 61cm (L) x 46cm (W) x 46cm (D).*
  • Fill out the details on the next page, then click "continue".
  • You can then choose whether to have the package collected, or if you'd prefer to drop it off at a Post Office.
  • Follow the steps to print off your free returns label, or free label-less Royal Mail Collection.
  • Once you have dropped it off at a Post Office, or once Royal Mail have collected it from you, depending on which you selected, it will be delivered to us within 3-5 working days.  Within 48 hours of delivery we will refund you in full.

*If the dimensions aren't smaller than those specified then please get in touch and we'll help you to return your order using a different courier.

If you have any questions at all, please feel free to send us an email on the contact page

International returns

We offer no quibble refunds to our worldwide customers too, however you will need to arrange and pay for delivery to our fulfilment centre in the UK within 90 days of receiving your order, with a note enclosed showing your order number, or a print out of your order confirmation email.  Once received, you will be refunded promptly. The return delivery address is:

The Organic Protein Company
Pack Fulfilment
Unit CB3, Little Braxted Hall
Little Braxted
United Kingdom

If you have any questions at all, please feel free to send us an email on the contact page.

Questions & Answers

Ask a question
  • Would this product be suitable for mixing with coffee? If not, do you have a product that would. Thanks.

    Thank you for the question.  You can certainly add it to coffee, but it will be quite bitty and won't have a milky or creamy texture.  You will get a more smooth result if you use whey protein instead.  However you'll need to mix the whey protein with water or milk first, and then pour it into the coffee - adding it directly will result in a very lumpy experience :-)

  • Do you do know how much lactoferrin is in the casein powder per serving?

    Thank you for the question.  We haven't had the casein tested for lactoferrin, as this is found primarily in whey protein, and only at very low levels in casein protein.  Whey protein is the one to go for if you are looking to increase your lactoferrin intake :-)

  • Is this from A2 Casein cows? As there's many studies now linking the more recent A1 Casein to many gut and brain diseases, so it's quite important to have only A2 casein.

    Hello, thank you for the question and apologies for the delay, I wanted to make doubly sure of the answer before replying.  It is made with milk containing both A1 and A2 casein. The evidence against A1 is pretty shaky to be honest, and funnily enough has been funded by A2-only milk companies, so not exactly without bias :-)

  • How many servings are in a pack? Thank you for your prompt response.

    Thank you for the question Jan.  There are 16 x 25g servings in the 400g pack, and 48 x 25g servings in the 1.2kg pack.  Not everybody needs a full serving size however, so if you have plenty of other protein sources in your diet then you could for example have half a serving instead.  I hope that helps :-)

  • Hello, Thanks for letting me know this item is now available. Please could you advise...does this contain Casein Phosphopeptides? Thanks

    Hi David, thank you for the question. Our casein protein isolate goes through a purely mechanical filtration process, whereas casein phosphopeptides are derived from the enzymatic hydrolysis of casein. As we don't use hydrolysis I would say our casein protein is unlikely to contain this in a readily available form. Sorry if this isn't the answer you'd like to hear :-)