Description
Fuel your recovery with Muscle Nation 100% Whey Protein Isolate, a premium whey protein isolate designed for lean muscle growth, faster recovery, and easy digestion. With 25g of protein per serve, low carbs, and almost no fat, it’s ideal for anyone chasing results without excess calories. Plus, it’s gluten-free and available in delicious flavours.
Why Choose Muscle Nation WPI?
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25g whey protein isolate per serve – rapid absorption for recovery.
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Low carbs, low fat – perfect for lean goals.
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Fast-digesting – great post-workout protein source.
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Gluten-free and gut-friendly – easy on digestion.
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Mixes smooth – no clumps or heavy texture.
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Wide range of flavours – from creamy classics to indulgent desserts.
How to Use
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Mix 1 scoop of Muscle Nation 100% Whey Protein Isolate with 250–300ml cold water or milk.
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Shake or stir until smooth.
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Enjoy post-workout, between meals, or as a daily protein boost.
Pro tip: Blend with oats or fruit for a high-protein breakfast smoothie.
Who’s It For?
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Athletes and gym-goers wanting lean recovery protein.
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Anyone dieting or cutting calories.
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People needing a fast-digesting protein source after training.
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Fitness enthusiasts who want high protein without heavy shakes.
FAQ
Is Muscle Nation WPI good for weight loss?
Yes — it’s low in calories, carbs, and fats, making it ideal for lean goals.
Does it contain lactose?
It’s very low in lactose and usually well tolerated.
How is WPI different from WPC?
WPI (isolate) is filtered for higher protein and fewer carbs/fats, while WPC (concentrate) is slightly slower digesting.
Why Buy from Sprint Fit?
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100% authentic Muscle Nation supplements.
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Free NZ shipping on orders $60+.
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Same-day dispatch nationwide.
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Trusted by Kiwi athletes and fitness enthusiasts.
Muscle Nation 100% Whey Protein Isolate – clean, fast-digesting protein for lean recovery and growth.
Facts
Serving Size: 1 Scoop 31G
Servings Per Container: 30

Please Note: Nutritional Information is to be used as a guide only, actual values may differ between flavours and sizes and when formulations are modified or updated by the manufacturer.
Contact us if you have any questions regarding this products ingredients.
FAQs
Muscle Nation 100% Whey Protein Isolate Powder Frequently Asked Questions
What sets Muscle Nation 100% Whey Protein Isolate apart from normal whey?
Muscle Nation 100% Whey Protein Isolate (WPI) is crafted through an advanced, ultra-filtration manufacturing process. This extra filtration stage strips away the vast majority of carbohydrates, fats, and raw dairy sugars. The resulting powder yields a highly purified, fast-absorbing complete protein matrix that supplies essential amino acids to weary muscle fibers instantly post-workout.
What are the exact macronutrient and amino acid metrics per serving?
Each standard 31g to 33g level scoop (depending slightly on the flavor profile) delivers a lean, concentrated recovery profile designed for macro-conscious trainers:
Protein: 25g of pure, ultra-filtered Whey Protein Isolate.
BCAAs: 6.2g of naturally occurring Branched-Chain Amino Acids to fuel muscle protein synthesis.
Glutamine: 5.7g of Glutamine to optimize post-training tissue conditioning and everyday recovery.
Macros: Zero fillers, containing under 1g of fat, low carbohydrates, and a controlled 119 calories per serving.
Will Muscle Nation WPI cause stomach bloating, gas, or heavy digestion?
No. Muscle Nation specifically engineers this formula for sensitive stomachs by embedding DigeZyme®. This patented, advanced multi-enzyme complex features a precise combination of active digestive enzymes (Alpha-Amylase, Acid Protease, Cellulase, Lactase, and Lipase). DigeZyme® rapidly accelerates the breakdown of protein macro-structures, eliminating post-shake bloating, gas, and heavy gastric feelings.
Can individuals with lactose sensitivities consume Muscle Nation WPI?
Yes. Thanks to the comprehensive cross-flow micro-filtration process, Muscle Nation WPI contains under 1% lactose. Because the vast majority of dairy sugars are filtered out and paired with the active lactase enzyme in the DigeZyme® complex, it is exceptionally well-tolerated by Kiwi fitness enthusiasts managing standard lactose sensitivities.
How many servings are in a standard tub, and what purchasing options exist?
Sprint Fit stocks flexible purchasing nodes depending on your training routine:
Full-Size Tub: Provides 30 full servings based on the standard daily scoop size.
5-Serve Sample Pack: Features a multi-flavor variety pack containing single-serve sachets—perfect for testing out the menu before committing to a full tub.
Can I use this isolate powder for cooking and healthy baking?
Absolutely. Because of its ultra-refined processing and smooth, non-clumping consistency, Muscle Nation WPI blends flawlessly beyond liquid shakers. It is an ideal, protein-dense ingredient to stir directly into morning oats, fold into Greek yogurt, or use as a flour substitute for healthy high-protein baking recipes.
What are the top-selling dessert flavors available at Sprint Fit?
Muscle Nation is globally renowned for its unique, indulgent, milkshake-inspired flavor profiles. Top-rated favorites across New Zealand include Vanilla Ice Cream (voted to taste like classic Kiwi Tip-Top ice cream), Milk Chocolate Flake, Choc Honeycomb, Chocolate Hazelnut, and Cookies & Cream.
How quickly does Sprint Fit ship Muscle Nation products across New Zealand?
Sprint Fit provides premier nationwide courier delivery. All orders completed before 3:45 pm, Monday through Friday, qualify for immediate same-day warehouse dispatch. Most Auckland and North Island addresses receive their packages overnight, while South Island shipments safely land within 1 to 2 business days.
Shipping
All orders $60 and over receive Free* Shipping Nationwide
Final pick up each day is at 3.45pm Monday to Friday.
Estimated Delivery Times*:
Auckland and North Island – Overnight
*During sale periods, please allow an additional 1–2 business days for dispatch due to high order volumes.
However many Auckland orders will be delivered the same day depending on what time the order is placed
South Island – Overnight (For larger parcels allow 2 business days)
Same Day/Evening Express Shipping upgrade available at checkout for select suburbs*
Click here to view the full Shipping Details and Returns Policy.
Muscle Nation 100% Whey Protein Isolate Powder Reviews
Milk Chocolate Flake
So yummy! Tastes like a chocolate milkshake!Vanilla Ice Cream
This is theeee BEST protein powder I have ever tasted. It taste like TipTop vanilla ice cream and doesn't have a bad after taste like most powders do. Will be my go to.Cinnamon Churros
Good cinnamon flavour, best paired with your choice of milk! I like pairing it with greek yogurt. The flavour might be a bit too intense for some but it's pretty good for me.Chocolate Hazelnut
Love this protein powder, no bloating at all. I got the choc hazelnut and it is delicious especially with the bits of chocolate through it, Definitely going to buy againVanilla Ice Cream
The best tasting vanilla!! bought like 5 times now.Salted Caramel
Chocolate Hazelnut
New favourite protein. I'm obsessed with the salted caramel ??