Estimated delivery by Tue Nov 17 · +48 hrs for Black Friday
from 69 verified customers2 flavours available
Whey Matrix by International Protein
Price
$143.96
$179.95
$0.00 per serve 0 serves
- 4 payments of $35.99*
- 4 payments of $35.99*
- From $23.99* a week
- Australian owned, Australian stock
- Dispatched from the east and west coast
- No surprise surcharges at checkout
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Shipping Insurance
$1.99 -
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Supplement Mart Shaker
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Add $6.04 and shipping is free
- Free gift when you spend $200
- Free postage on orders over $150
- East & west coast dispatch
- Easy returns within 30 days
- Free standard shippingFREEOrders $150 and over, anywhere in Australia.
- Standard$12.95Orders under $150. Tracked, from the warehouse closest to you.
- Express$19.95Australia Post express network, any order value.
- Express + Skip The Line$29.95Your order is picked and packed ahead of the queue, then sent express.
- Click & collectFREEReady in 4 hours at any of our 58 stores. No minimum.
- Australia Post parcel lockerSAME RATESHave it sent to a 24/7 parcel locker instead of your door and collect whenever suits. Choose a locker address at checkout; standard and express rates apply as above.
- Shipping insurance$1.99Optional freight protection, added in the cart.
- Eco bag$0.99A reusable Supplement Mart bag you can add to your order.
- Heavy RTD levy$20Cartons of ready-to-drink only. The $150 free threshold still applies to the rest of the order.
Black Friday volume means orders are taking a little longer to leave us than usual. The rates above are what you will see at checkout.
Unopened and unused, send it back within 30 days for a refund or a swap. Change of mind included. Sealed tubs only, for obvious reasons.
Not sure which one is right for you? Ask us in chat, or walk into any of our 58 stores across Australia. Our staff train, so you get an answer rather than a sales pitch.
NUTRITION & INGREDIENTS
Disclaimer: Please note, while we try our best to keep up-to-date nutritional information available on the website, packaging and products can change, therefore this information should serve only as a guide. Please refer to actual packaging for latest information.
BEST PAIRED WITH
WHY IT WORKS

- Provides 24.5g of protein per serve to support muscle growth, maintenance and recovery.
- Features a multi-source protein blend combining whey protein, casein and milk protein for a...
- Contains naturally occurring essential amino acids, including BCAAs, which contribute to muscle protein synthesis.
More about Whey Matrix
International Protein Whey Matrix is a versatile protein powder designed to support muscle growth, recovery and everyday protein intake. Combining multiple sources of high-quality dairy protein, this formula delivers 24.5g of protein per serve to help fuel your active lifestyle. Whether you're looking to support your training goals, increase your daily protein consumption or enjoy a convenient protein-rich snack, Whey Matrix offers a practical solution. With a smooth, creamy texture and delicious flavours, it's an easy addition to your post-workout routine or daily nutrition plan.
- Provides 24.5g of protein per serve to support muscle growth, maintenance and recovery.
- Features a multi-source protein blend combining whey protein, casein and milk protein for a varied amino acid release profile.
- Contains naturally occurring essential amino acids, including BCAAs, which contribute to muscle protein synthesis.
- Includes DigeZyme® digestive enzymes to assist with the breakdown of proteins, carbohydrates and fats.
At the heart of International Protein Whey Matrix is a carefully selected protein blend featuring Whey Protein Concentrate, Calcium Caseinate, Milk Protein Concentrate, Whey Protein Isolate and Hydrolysed Whey Protein Isolate. Whey proteins provide a readily digested source of essential amino acids, making them particularly suitable for consumption around training. Calcium caseinate and milk protein contribute slower-digesting proteins, helping provide a more sustained release of amino acids. Together, these protein sources deliver a comprehensive amino acid profile to support muscle protein synthesis and maintenance as part of a balanced diet. The formula also contains DigeZyme®, a digestive enzyme blend featuring amylase, protease, lipase, cellulase and lactase. These enzymes assist in breaking down different food components, including proteins, carbohydrates, fats and lactose. With 24.5g of protein per serve and a convenient, easy-to-mix format, International Protein Whey Matrix is suitable for use after exercise, between meals or whenever you need an additional source of dietary protein to help meet your daily nutritional requirements.
Nutritional Information

Directions of Use
- Mix 1 scoop (approximately 36g) with 200–300mL of cold water or milk in a shaker or blender.
- Consume after training or between meals as required to help meet your daily protein needs.
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CUSTOMER REVIEWS
4.7 / 5 from 69 reviews
Good, a touch sweet
Works well and sits fine in the stomach, which is the main thing for me. Half a serve is plenty if you are sensitive to sweet.
Been on International Protein for years
Have tried the cheap stuff and come back every time. Consistent batch to batch, which is what you are paying for.
My partner stole it
Bought it for myself, now we go through two of them. Second order this month.
Flavour not for me
Nothing wrong with the product and the delivery was quick. The flavour I picked is just not my thing, so I will try a different one next time.
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