Dispatched today if you order in the next few hours. Estimated delivery by Thu Oct 29
from 81 verified customers4 sizes / 18 flavours
R1 Protein Whey Isolate by Rule 1
Price
$109.95
$0.00
$4.99 per serve 22 serves
- 4 payments of $27.48*
- 4 payments of $27.48*
- From $18.32* a week
- Rapidly delivers 25g of protein
- Ultra-lean muscle building formula
- Packed with muscle-building BCAAs
- Gentle on sensitive stomachs
STACKS WELL WITH...
Add $40.05 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

Remy Hughes - Supplement MartVerified expert
Msc Sports Nutrition, Bsc Exercise Science
Reviewed Jan 2026
Good fit for
- Muscle building
- Fast recovery
- Muscle recovery
Not for
- Milk allergy
- Vegan diets
About this product
- 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.
Orders placed before 2PM AEST on a business day leave the same day. 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
Based on the Chocolate Fudge flavour. Other flavours vary slightly.
Key ingredients
- Protein Blend (WPI, Hydrolysed WPI)30.4g
- Protein24.3g
Disclaimer: 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
QUESTIONS
What makes R1 Isolate different from standard whey protein powders?
Is R1 Isolate suitable for people who are lactose sensitive?
How does R1 Isolate support muscle growth and recovery?
When is the best time to take R1 Isolate?
Can R1 Isolate be used during a fat-loss or cutting phase?
Does R1 Isolate contain added sugars or unnecessary fillers?
How does R1 Isolate mix and taste compared to other isolates?
Is R1 Isolate tested for quality and banned substances?
Can R1 Isolate be used for purposes other than shakes?
Who is R1 Isolate best suited for?
ACTIVE INGREDIENTS
-
Protein Blend (WPI, Hydrolysed WPI)30.4g
-
Protein24.3g
WHAT'S IN IT
R1 Isolate delivers fast-absorbing protein with a clean nutritional profile. Ideal for those prioritising lean muscle support.
- Perfect if you want a lean protein
- Helps you hit daily protein targets fast
- Supports efficient muscle recovery and growth
ABOUT THIS PRODUCT
*** Clearance special - 2lb Strawberry Banana reduced! Expiry 11/26. Whilst stock lasts ***
Are you ready for one of the most popular protein powder drink mixes? Rule 1 R1 Protein Isolate is an absolute masterpiece: this high protein-yielding supplement contains 25g of protein, very low fat, 6g of BCAA’s, only 1g of carbs and NO fillers! It has been carefully designed to help you improve your physique and boost your performance to the absolute max. Know what you’re getting! Rule 1 R1 Protein Isolate will enhance your workout session and blow your mind at the same time. As one of the cleanest, highest yielding proteins on the market of WPI’s, it contains 0 gums, 0 creamers, 0 added sugars, 0 fat, 0 gluten (excludes cookies & cream), 0 fillers, 0 artificial preservatives and 0 amino or banned substance spiking!
- With whey isolates & hydrolysates.
- 25g protein per serving.
- 87% of protein per serve.
- 6g BCAA’s.
- Low sugar and fat.
- Super smooth mixability.
Rule 1 R1 Protein Isolate is made of protein from 100% whey isolates and hydrolysates – absolutely no whey concentrates! These extraordinarily high-quality proteins are packed with muscle-building amino acids like leucine and are especially useful for higher-level athletes. Whey isolate is lower in fat and carbs than whey concentrate as it is further processed in such a way that much of the fat and carbs are removed. Furthermore, this type of protein is easier to digest for those with lactose sensitivities. Whey hydrolysate is digested the fastest, making it great for those with digestive problems or milk allergies. The best thing about hydrolyzed whey is its ability to break down fast and send amino acids to your muscles more rapidly than the other forms of whey, making it great for you when you have serious muscle-building goals! If you’re looking for high-quality protein source capable of helping you meet total daily protein goals and maximizing your muscle growth, Rule 1 R1 Protein Isolate is for you! With just under 87% of protein and over 6g of BCAA’s per serve, Rule 1 WPI provides the ideal, most delicious shake of naturally occurring proteins combined with clinically proven muscle-building amino acids through added fortification. Include Rule 1 R1 Protein Isolate in your training routine and experience the ultimate workout session!
Nutritional Information
(Based on 38 serve Chocolate Fudge flavour)

Directions of Use
- Tasty Shakes: Mix one heaping scoop of R1 Protein with approx. 240ml of water, milk, or your favorite beverage in a shaker cup or glass with spoon.
- Smoothies: Add your favorite fruit and ice to the above, mix in blender and enjoy!
- Quickie Breakfasts: Stir one scoop into oatmeal or yogurt for a fortified start.
- Suggested Use: Consume 1-3 shakes (or equivalent) per day, based your personal protein requirements.
- Best taken within 20 minutes after exercise, but can be taken any time of day.
CUSTOMER REVIEWS
4.9 / 5 from 81 reviews
I think this is the best-tasting protein ever
Tastiest protein on the market
Tastiest protein on the market. My absolute must have on ice with almond milk and a couple shots of coffee. My morning go-to
Such a great protein powder. Tastes good and mixes really easily
Salted caramel is the best. We use it every day for our a pre-workout protein coffee and also in yoghurt. We buy in bulk that's great!
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