FREE SHIPPING OVER $150
EASY 30-DAY RETURNS
Products R1 Protein Isolate by Rule 1
4.8
Rated 4.8 out of 5 stars
40

R1 Protein Isolate by Rule 1

See full nutrition info
$114.95
Size
1lb
2lb
5lb
10lb
Colour
Chocolate Fudge
Vanilla Creme
Birthday Cake
Frozen Banana
Vanilla Butter Cake
Strawberry Banana
Strawberries and Creme
Pistachio
Mint Chocolate Chip
Lightly Salted Caramel
Fruity Cereal
White Choc Raspberry
Cookies and Creme
Cinnamon Swirl
Café Mocha
Chocolate Peanut Butter
Choc Coconut
Mint Choc Chip
Choose Option
2lb / Vanilla Creme
Chevron

Afterpay

Shop now. Pay later. Always interest-free.

Afterpay allows you to split your purchase into 4 equal payments, due every 2 weeks. The first payment is due at checkout.

No interest when you pay on time. Late fees may apply.

*Available to Australian residents aged 18+. Subject to approval. Terms & conditions apply. Visit afterpay.com for full details.

PayPal Pay in 4

Buy now, pay later — interest-free.

Split your purchase into 4 equal payments, with the first payment due at checkout and the remaining payments every 2 weeks.

No interest or late fees.

*Available to eligible PayPal account holders. Subject to approval. Terms apply. See paypal.com for full details.

Zip

Own it now. Pay over time.

Zip lets you split your purchase into flexible repayments. Choose weekly, fortnightly, or monthly payments.

Always interest-free. Account fees may apply.

*Available to approved applicants only. Terms & conditions and fees apply. Visit zip.co for more information.

Free Gift Icon
Free Postage Icon
Dispatch from East & West Icon
30 Day Returns Icon
Free Gift Icon

Free Gift With Purchase

Surprise gifts with qualifying orders!

We love to show our awesome customers some appreciation, that's why we include a free gift with qualifying orders! The gift varies based on current promotions and your order value.

Look for the gift icon on product pages to see if it qualifies for a free gift. No code needed - we'll automatically include it with your order!

Gift selection may vary based on availability. One free gift per customer per order. While supplies last.

Free Postage Icon

Free Shipping Australia-Wide

Get your supplements delivered free, no matter where you are!

Enjoy complimentary standard shipping on all orders over $99. For orders under $99, we offer competitive flat-rate shipping to ensure you get the best value.

We ship to all addresses across Australia, including PO Boxes. Express shipping options are available at checkout for those who need their supplements in a hurry.

Standard shipping typically takes 3-7 business days. Express shipping delivers in 1-2 business days to most areas. Remote areas may experience longer delivery times.

Dispatch from East & West Icon

East & West Coast Distribution

Faster delivery, no matter where you are in Australia!

We're proud to be the ONLY Australian supplement supplier with warehouses on BOTH the east and west coasts. This unique advantage means faster delivery times for all our customers.

Your order is automatically dispatched from the warehouse closest to your location, ensuring you receive your supplements as quickly as possible. Customers typically receive their orders in 1-3 days.

Delivery times are estimates and may vary during peak periods.

30 Day Returns Icon

30-Day Money-Back Guarantee

Try our products risk-free for 30 days!

We stand behind the quality of our supplements. If you're not completely satisfied with your purchase, you can return it within 30 days for a full refund or exchange.

To initiate a return, simply contact our customer service team with your order number. We'll provide you with a return shipping label and instructions. Once we receive your return, we'll process your refund within 5 business days.

Products must be returned in their original packaging. Shipping costs for returns are covered by us. This policy applies to first-time purchases of each product.

💪Lean Isolate Formula
👍Low Fat & Carb Content
Quick Digestion
Quick Digestion
💪Clean Nutrition Support
Quick view
Quick view
$114.95
Size
1lb
2lb
5lb
10lb
Colour
Chocolate Fudge
Vanilla Creme
Birthday Cake
Frozen Banana
Vanilla Butter Cake
Strawberry Banana
Strawberries and Creme
Pistachio
Mint Chocolate Chip
Lightly Salted Caramel
Fruity Cereal
White Choc Raspberry
Cookies and Creme
Cinnamon Swirl
Café Mocha
Chocolate Peanut Butter
Choc Coconut
Mint Choc Chip
Choose Option
2lb / Vanilla Creme
Chevron
Description +

 Rule 1 R1 Protein Isolate 

*** Clearance special - 2lb Birthday Cake and 5lb White Choc Raspberry reduced! Expiry 05/03. 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.
  • Less than 1g fat, 1g carbohydrates.
  • 6g BCAA’s.
  • No added sugar & low fat.
  • Zero fillers.
  • 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.
Disclaimer +

Always read the label. Follow directions of use. Please read the label to decide whether this product is right for you.

Consult with your relevant healthcare professional before taking supplements or vitamins, especially if you are currently taking medication. If symptoms transpire and persist, seek immediate advice from your relevant healthcare professional.

If pregnant, planning pregnancy, or breastfeeding, consult with your healthcare professional before using any health foods, functional foods, supplements or vitamins.

Supplements and vitamins should not be used by persons under the age of 16, unless the product is specifically designed for children or otherwise advised on by your healthcare professional.

Supplements, vitamins and minerals should never replace a balanced and varied diet.

Keep all supplements and vitamins out of reach of children. Always follow advised storage conditions and consumption instructions.

Do not exceed recommended daily dosage. Do not consume products if seals are broken or damaged. Do not consume products if best before or expiry dates have exceeded.

Some powdered products, including (but are not limited to) pre-workout, fat burners, single amino acids, pump/nitric oxide boosters, citrulline, agmatine, arginine and carnitine are naturally deliquescent products, or contain ingredients which are naturally deliquescent. Clumping or hardening of these products over time is a natural and common occurrence, and despite containing moisture absorption sachets, these products may still clump or harden over time.

Although extra care is taken to ensure all product Descriptive Information, Nutritional Information and Directions Of Use are kept up-to-date and current, manufacturers and suppliers may change product formulations and ingredients without warning, and may not advise of us these changes. Please ensure Supplement Mart endeavors to keep products updated with the latest and correct product information which the manufacturer or supplier has directly provided us.

If you are purchasing items which are prone to melting (including but not limited to, chocolate bars, protein bars, items with chocolate chips or pieces etc), or items which can easily be damaged (including but not limited to, chips, aluminum cans, glass vitamins etc), we strongly recommend you purchase Shipping Insurance with your order. Supplement Mart takes no responsibility for items which are melted or damaged in transit, and we do not replace or refund any items which are damaged under these circumstances if they are not covered by Shipping Insurance. You can purchase Shipping Insurance at the cart/checkout page with your order.

We also strongly recommend to not authorize “Authority to Leave” on your order if it contains items which can melt, due to the risk of these items being left in an unsuitably warm and sunny position by the courier.

Purchase of clearance and special items is final, we do not offer exchanges or refunds on these items.

Trending Questions 🔥

What makes R1 Isolate different from standard whey protein powders? +

R1 Isolate is formulated using whey protein isolate as the primary—and often exclusive—protein source, which means the protein has undergone additional filtration compared to whey concentrate. This process removes most of the lactose, fats, and sugars while preserving the amino acid profile. The result is a cleaner protein powder that delivers a higher percentage of protein per serve, making it ideal for users who want lean protein support without unnecessary calories or fillers.

Is R1 Isolate suitable for people who are lactose sensitive? +

R1 Isolate is generally well tolerated by individuals with mild lactose sensitivity due to its extremely low lactose content. During isolation, most milk sugars are filtered out, which significantly reduces digestive discomfort for many users. However, it is not completely lactose-free, so those with severe lactose intolerance should assess tolerance gradually or consult a healthcare professional before use.

How does R1 Isolate support muscle growth and recovery? +

R1 Isolate delivers a complete amino acid profile, including naturally occurring branched-chain amino acids (BCAAs) such as leucine, isoleucine, and valine. Leucine plays a key role in stimulating muscle protein synthesis, while the fast digestion rate of whey isolate ensures amino acids reach the muscles quickly after training. This combination supports muscle repair, recovery, and lean mass development when paired with resistance training.

When is the best time to take R1 Isolate? +

R1 Isolate is most commonly consumed post-workout due to its rapid digestion and fast amino acid delivery. It can also be used first thing in the morning to break an overnight fast or between meals to increase daily protein intake without adding excessive calories. Its low fat and carbohydrate content makes it particularly suitable when timing and macronutrient control are important.

Can R1 Isolate be used during a fat-loss or cutting phase? +

Yes. R1 Isolate is frequently chosen during fat-loss phases because it provides high protein with minimal carbohydrates and fats. Protein helps preserve lean muscle mass while dieting and contributes to satiety, which may help control hunger. This makes R1 Isolate a practical option for athletes and everyday users aiming to maintain muscle while reducing overall calorie intake.

Does R1 Isolate contain added sugars or unnecessary fillers? +

R1 Isolate is designed with a minimalist formulation philosophy. It contains no added sugars and avoids excessive fillers that dilute protein content. Sweetness is achieved using carefully selected low-calorie sweeteners, allowing the product to maintain taste without compromising its nutritional profile. This approach aligns with users who prioritize transparency and macronutrient accuracy.

How does R1 Isolate mix and taste compared to other isolates? +

R1 Isolate is known for its fine texture and strong mixability, dissolving easily in water or milk with minimal clumping. The filtration process contributes to a lighter mouthfeel compared to thicker whey concentrates. Flavor profiles are engineered to remain smooth and clean, avoiding the overly creamy or artificial taste sometimes associated with high-protein powders.

Is R1 Isolate tested for quality and banned substances? +

Rule 1 emphasizes manufacturing consistency and quality control across its product range. R1 Isolate is produced using rigorous testing protocols to ensure label accuracy and ingredient integrity. While not marketed as a medical or drug-tested product, it is manufactured to meet strict quality standards that appeal to competitive athletes and informed consumers alike.

Can R1 Isolate be used for purposes other than shakes? +

Absolutely. R1 Isolate can be incorporated into protein-rich recipes such as oats, smoothies, pancakes, or baked goods. Because of its neutral texture and low fat content, it blends well without significantly altering consistency. This versatility allows users to increase daily protein intake across multiple meals rather than relying solely on shakes.

Who is R1 Isolate best suited for? +

R1 Isolate is ideal for individuals seeking a high-purity protein source with minimal calories, including athletes, gym-goers, and health-conscious consumers. It is particularly well suited to those focused on lean muscle development, body recomposition, or strict macronutrient tracking. Beginners and experienced users alike benefit from its simplicity, digestibility, and performance-focused formulation.

4.8
Rated 4.8 out of 5 stars
Based on 40 reviews
QualityRated 4.5 on a scale of 1 to 5
TasteRated 4.5 on a scale of 1 to 5
40 reviews
  • S
    Sam
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Very good very nice

  • T
    Tatiana
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Delicious! I’ll keep buying it

  • T
    Tatiana
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Great shake, tasty.

  • J
    Joyce
    I recommend this product
    Rated 5 out of 5 stars
    7 months ago
    5 Stars

    R1 Cinnamon Swirl is my new favourite.. great flavour in oats or a shake. Will buy again and again. Doesnt bloat like other whey proteins.

  • S
    Sarah
    I recommend this product
    Rated 5 out of 5 stars
    9 months ago
    5 Stars

    Best protein ever

Supplement Mart Store Locator
Store Locator
56 stores Australia wide
Find A Store