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Amino Z Casein

By: Amino Z

Best Seller
Amino Z Casein Amino Z Casein
4.8 5 1 238 28.75

Amino Z Casein

By: Amino Z

Best Seller

Standard Price

Ships Free!

Club Z Price

Ships Free!
You're saving 42% per 100g
Compared to our average of $7.74/100g for Casein Protein Powder [Info]

Standard Price

Ships Free!

Club Z Price

Ships Free!
Add a 5 litre recyclable storage jar for $9.95 [Info]

In-stock & Available Online (info)

22,507 customers love this item[Add to Favourites]
A 20% discount is auto-applied. Coupons discount off the full price.
Amino Z ULTRA Shaker Bottle 700mL with Mixer

Add Amino Z ULTRA Shaker Bottle 700mL with Mixer & save $6 (normally $12.95). No further discounts apply.

Total: $50.39
Bundle Discount: -$6
Together: $44.39
✓ Australian Product
✓ Australian Owned Brand
✓ 110% Guarantee (info)
✓ 87% less plastic in packaging (info)
✓ Soy Free
✓ Vegetarian Friendly
✓ Free From Added Colours
Size Options

This product comes in standard sizes of 1kg and 500g. Other sizes are sent as multiple items. For example, 3kg will be sent as 6x 500g items.

We do this to reduce manufacturing costs and pass those savings on to you. This also allows you to maintain product freshness in unopened items. Don't forget that you can also choose the Multiple Flavours option (above) in larger pack sizes while getting a much lower per-unit price!



Casein is a slow digesting & absorbing protein. It's ideally used before prolonged periods of fasting (i.e. before bed) or between meals to support muscle recovery. It may also assist in satiety. Amino Z Casein is ideal for individuals aiming to maximise muscle recovery and protein synthesis.

What you can expect from Amino Z Casein

• Assists in muscle recovery
• A delicious and convenient way to achieve your daily protein intake

Questions & Answers

Below we have answered some commonly asked questions about this product.

What is Casein protein?

Casein protein is a protein found in cow's milk. When carrying the same amino acid profile as whey protein, casein protein is absorbed at a different rate.

Casein protein is a slow-releasing protein. In other words, after ingestion, your muscles will be 'drip-fed' casein for several hours. Casein protein is often considered 'anticatabolic' as it provides a steadier stream of acids and protein supply to prevent muscle breakdown.

What does the research show for casein protein supplementation?

1. Casein ingestion before sleep improves post-exercise overnight recovery, according to a 2012 study. [1]

2. Casein protein supplementation may increase lean muscle mass. [2]

[1] Res PT, Groen B, Pennings B, Beelen M, Wallis GA, Gijsen AP, Senden JM, VAN Loon LJ. Protein ingestion before sleep improves post-exercise overnight recovery. Med Sci Sports Exerc. 2012 Aug;44(8):1560-9. doi: 10.1249/MSS.0b013e31824cc363.

[2] Tsutsumi R, Tsutsumi YM. Peptides and proteins in whey and their benefits for human health. Austin J Nutri Food Sci 2014;1(1): 1002.

When should I take casein protein?

Since casein protein is slower digesting we recommend consuming it before long fasting periods (i.e periods whereby you're not consuming nutrients or food for 4+ hours). Examples include before bed or as a final meal before fasting.

Which allergens are processed in the Amino Z manufacturing facility?

Milk, fish, tree nuts, gluten and peanuts.

Amino Z conducts thorough, regular and systematic cleaning and anti-cross contamination measures to ensure your product is safe to consume.

What does Casein taste like?

Casein is generally considered to have a pleasant taste. It should be noted that casein is thicker than standard whey protein.

Why is this product so much cheaper than similar products on the market?

Many other brands incur a high degree of costs associated with producing products. It is not uncommon for a product to be produced by a third-party manufacturer and then shipped (or imported) to a wholesaler. The wholesaler then sells to a retail store, who on-sells to the customer. The end result is that often four separate businesses are taking profits at each stage (the brand itself, the manufacturer, the wholesaler and the retailer).

We take a very different approach which allows us to keep our cost structure down and we pass those savings on to you, without sacrificing product quality.

We have our own purpose-built manufacturing plant located in Sydney Australia and we sell directly to you. This eliminates all additional parties from the process, thereby eliminating a lot of unnecessary costs.

The significant cost savings we incur allow us to invest into high quality ingredients while still offering a significantly cheaper final product.

I haven't tried this product before. What if I don't like it?

Because we manufacture this product ourselves, we believe that the onus is on us to produce a high quality product that you're going to love.

That's why we have our 110% Guarantee. Basically if you try it and you don't love it, just reach out to us. You can receive a 110% store credit, or a full refund.

Select flavour:
Per 32.6g ServePer 100g
Energy488.2 kJ1498.3 kJ
Energy (Calories)116.8 cal358.4 cal
Protein (g)23.3 g71.5 g
Total Fat (g)0.9 g2.9 g
Saturated Fat (g)0.6 g1.7 g
Trans Fat (g)0 g0.1 g
Total Carbohydrate (g)2.9 g8.8 g
Sugar (g)2.6 g8 g
Total Fibre (g)0.6 g1.7 g
Sodium (mg)53.6 mg164.4 mg
Caffeine (mg)0 mg0 mg

Milk Protein Concentrate (Milk), Flavours, Cocoa, Pink Himalayan Salt, Sweetener (Thaumatin)

Mix 1 serve with 250mL of water and mix well with a shaker.


Processed in a facility that processes Fish, Gluten, Milk. These allergens may be present.

Formulated supplementary sports food. For use by healthy adults only. It is not recommended for persons under the age of 18. Do not use if pregnant or breastfeeding. Keep out of reach of children. Do not consume this product if you have a medical condition or are taking any prescription medicines. Do not exceed recommended serving. Consult a physician prior to use.


Lab Test Results

Product quality and transparency is at the heart of our values. Below you will find the independent third-party lab tests we have published relevant to this product.

Finished Product Lab Tests (Salmonella)

Amino Z Casein 1kg : Chocolate (New and Improved): Lab test date: 14/04/23

Ingredient Lab Tests

Milk Protein Concentrate : Lab test date: 13/10/22
Milk Protein Concentrate : Lab test date: 17/09/22
Milk Protein Concentrate : Lab test date: 13/08/22
Milk Protein Concentrate : Lab test date: 17/05/22
Amino Z Supps Video Reviews
Amino Z Casein Reviews
Average Rating:  
4.8 from 238 ratings
  • 5 Stars
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  • 1 Stars
New and very much improved casein!
By Jason reviewed on 10/11/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

Chocolaty with a touch of salt. This gives it a slightly contrasting yet balanced flavour profile!

Texture is smooth, no grittiness at all. Blends easily. Great new formulation!
Was this review helpful ? Yes / No
Great taste and solubility
By Deepak reviewed on 5/11/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

Excellent product, mixes well in any liquid and tastes great. Highly recommended. Great price as well - very economical.
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Mixes well and tastes great
By Alicia reviewed on 2/10/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

Have tried others, this one ranks among the best for mixability and taste. Highly recommend.
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Great product
By Deepak reviewed on 27/08/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

Excellent solubility and great tasting casein. A serve before bedtime provides slow sustained protein to help reduce muscle breakdown overnight.
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Great taste for casein :)
By David reviewed on 18/08/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

This casein tastes pretty good, even in just water and the texture is great.. not extremely thick/heavy/lumpy like some others. It mixes very well. Will happily buy again.
Was this review helpful ? Yes / No
By Jose reviewed on 22/07/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

I bought to flavours pack and both are fantastic. Top quality! The store and product recommended. It's my third purchase and I'll not stop. Healthy cares.

Our reply:

Thanks for your feedback, Jose! I am glad that you are enjoying both flavours and find them fantastic.

We're honoured to be your go-to store for protein supplements. We will continue to maintain the high standard of our products and services to ensure your satisfaction with every purchase.

Thanks again for your support of the brand, Jose, and please feel free to reach out to us at any time.

* Shiela
Amino Z Team

Was this review helpful ? Yes / No
By Ian reviewed on 12/07/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

Great price point product for quality protein isolate. Im a fan of the choc mixture flavours (choc caramel, choc banana, choc orange, choc mint) great tasting flavours which are hard to come by! Highly recommend!

Our reply:

Thanks, Ian! I am very delighted to hear your positive feedback on Amino Z Casein!

It's fantastic to know that you're enjoying the combination of great quality protein isolate and taste at an attractive price point. Your recommendation means a lot to us, and we're committed to providing products that not only meet but exceed your expectations.

If you have any more feedback or inquiries, feel free to get in touch. Thank you for choosing Amino Z, and keep enjoying those delicious flavours!

* Shiela
Amino Z Team

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Surprisingly Good!
By Fraser reviewed on 8/06/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

I've purchased heaps of stuff from Amino Z in the past but due to bad experiences with other 'own brand' proteins & big brand name Caseins that don't hit the mark, for years I've stuck with what I've found to be tasty & given up trying new ones. I've only ever found 2 Caseins that I'd ever recommended to people (Max's & Gen-Tec) as most are grainy/horrible consistency. Today I decided it was time to try a new one I've found a 3rd bigtime winner in Amino Z Casein, but this one costs considerably less! For casein its super smooth, mixes well & has a deep chocolate flavour which I love! Would love to see a few more flavours in this one in the future! Will definitely be a Casein staple moving forward! Love it.

Our reply:

Thanks for the review on our Amino Z Casein, Fraser!

I understand the importance of finding reliable and tasty protein options, especially when it comes to casein. We're honoured that you've chosen to give our Amino Z Casein a try despite previous bad experiences with other brands. Your trust in our product is valued, and we're glad to have delivered a positive experience.

It's fantastic to know that our casein stood out in terms of its smooth texture, easy mixability, and deep chocolate flavour. I appreciate your suggestion for additional flavours, and we're always striving to provide a variety of options that cater to our customers' preferences. Your feedback is valuable as we consider future developments.

If you have any further comments, questions, or feedback, please don't hesitate to reach out.

* Shiela
Amino Z Team

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love my multiflavoured casein
By Maxim reviewed on 20/01/2023

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

My 3 kilos of casein just arrived - chocolate, banana and vanilla flavorous.
I take it after my night gym sessions, as casein fill my stomach pretty well before sleep.
Love it so far.
Going to order it again in the future and definitely recommend AminoZ as high quality and reliable products.
Was this review helpful ? Yes / No
Not bad
By Keith reviewed on 23/04/2022

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

I found this reasonably tasty but it did seem to me to have a bit of ‘grittiness’ when made up. Not quite as good as my more preferred products but good value for money

Our reply:

Thank you for the review Keith and I really appreciate your honesty. I'll be passing this feedback along to our product development team internally.

Also, all Amino Z branded supplements are back by our 110% Guarantee. If you didn't like the flavour/taste or if you're simply not happy with anything about the product- just let us know and we'll be happy to replace them, refund you 110% via Z points so you can use it again on your next/future orders from us, or we can do a full refund too/etc. Basically, we'll work really hard on keeping you happy. So if a problem arises, just contact us and we'll do our very best to fix it!

Thanks again for your support of the brand Keith and please feel free to reach out to us at any time.

Amino Z Team

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Our 110% Guarantee Promise

Our 110% guarantee is exactly that - if you're not completely happy with your product, let us know and we'll credit you back with 110% of the price that you paid for it (including any shipping cost incurred for the product).

This offer is valid on all Amino Z Supps and any other products marked with a "110% Guarantee" ribbon.

Even if you've opened it up! (How else will you know if you like it?)

Prefer a refund? No worries. If you're unhappy with your purchase, we'll refund you in full.

Valid within a month (30 days) of receiving your order. So we can continue to offer this to all customers, a "fair go" policy applies to prevent abuse and full details can be found in our Terms & Conditions section on this website.

100 Day Returns

100 Day Returns!

• Easy and hassle free
• You can return both opened and unopened product (see below for details)

For up to 100 days from the day that you place your order, you can take advantage of our returns, even if you just change your mind!

Please note, this policy does not relate to items that are damaged in transit, lost or incur an issue beyond your control. In situations like these, we will either refund, credit or send a replacement to you without delay. Our 100 day returns is for your peace of mind if you don't like the product, or simply change your mind.

For any unopened product, just ship the item back and we will refund or replace that item! You can obtain a refund, store credit or product exchange to the same value. Just let us know within 100 days from the date of your order.

For any opened product (Club Z members only), we understand that trying new supplements sometimes carries some uncertainty. Perhaps you’re not sure about a new flavour, or you just bought the wrong product. So if you're not happy with your purchase within 5 scoops (or 5 serves) and 30 days from the date of purchase, you can send it back for a full money-back guarantee! The purchase must have been made when you had an active Club Z membership.

Please note that if your item was purchased as an advertised discounted shortdated item, the above time frames are limited to 14 days. Shortdated items are heavily discounted items due to a sooner expiry date.

If however there was any issue in receiving your order (for example, if your order was lost or damaged in transit) - don't stress! Just contact us and we'll fix things up for you.

Simply contact us by email, phone, chat or visit us in-store to arrange a return. Our returns policy is subject to our standard terms and conditions.

Other Returns

Whenever a problem is incurred that is not your fault, we will be happy to arrange return shipping (if applicable) and the shipment of any replacement goods to you to avoid any further cost and inconvenience. All you need to do is contact us so we can jump on it as quickly as possible.

Here's what we will do in certain situations:

- Your item has been damaged/lost in transit (we'll replace it)
- Incorrect goods received (although rare, we'll ship off the correct item)
- A problem with the actual product or anything else (we'll do what is necessary to fix things for you!)

So we can fix things quickly for you, please let us know of any issues within 48 hours of receiving your goods. In certain situations we may ask for a photograph (for example if the product is damaged in transit, so we can take it up with the delivery company to avoid future issues).

If you do receive an incorrect product, please do not open the actual product so we can arrange a resolution quickly.

In a nutshell, we work really hard on keeping you happy. So if a problem arises, just contact us and we'll do our very best to fix it!

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