tuff supps Whey protein isolate container with blue label on a dark background
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Premium Whey Protein Isolate - Grass Fed
Whey protein isolate container and shaker on a weight plate in a gym setting
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tuff supps Whey protein isolate container on a kitchen counter with a glass of milk and a scoop.
Tuff supps Whey Protein Isolate container with blue label on a dark background

27.8g of grass-fed whey isolate

Premium Whey Protein Isolate - Grass Fed

71 total reviews

| 500+ happy customers
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Grass-fed isolate:27.8g of protein per 30g serve - 90% protein by weight

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Easy on the gut:99.9% lactose-free, minimal ingredients, no gut drama

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Ultra-lean:less than 1g of fat and carbs per serve

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Australian owned Formulated in Gold Coast
Description
What's inside & why it works

Your protein shouldn't need a disclaimer. 27.8g of grass-fed whey isolate per 30g serve, 99.9% lactose-free, with less than 1g of fat and carbs.

Cold-processed from pasture-raised cows to preserve the natural protein structure, naturally flavoured and sweetened with organic stevia - just 3 main ingredients.

The leanest way to hit your protein target: it absorbs fast, sits easy and gets out of your way.

How To Use
Dosage & timing

Mix 1 scoop with 250-300ml of cold water or milk. Vary the liquid to your preferred taste and thickness.

Best practices:

  • Shake with cold water for the leanest serve, or milk for a creamier one
  • Post-training, first thing in the morning, or between meals - wherever protein's the gap
  • Stir into oats, yoghurt, smoothies or baking - it mixes clean with no clumping
  • Keep it consistent on training and non-training days - protein targets work when you hit them daily

Use as part of a balanced diet. Protein needs vary by body size, training and total food intake.

Benefits
What you'll feel

Taking WPI daily, you'll notice:

  • Sits light: 99.9% lactose-free - none of the heaviness or bloat standard whey can cause
  • Recovery you can feel: 27.8g of fast-absorbing grass-fed protein feeding muscle repair
  • Ultra-lean: less than 1g of fat and carbs per serve - protein without the calorie baggage
  • An easy routine: works in shakes, smoothies, oats and baking
  • No compromise: smooth and creamy, with a label you can actually read

Individual results vary. Use as directed and pair with consistent nutrition, movement, hydration and sleep.

Nutritional information

Containing just the essential ingredients with certified organic stevia and all-natural flavours, our grass fed whey protein is free from artificial additives, fillers and other nasties.

Vanilla - Whey Protein Isolate, Natural Vanilla Bean Powder, Natural Flavours, Vegetable Gum, Certified Organic Stevia.

Chocolate - Whey Protein Isolate, Dutch Natural Cocoa Powder, Natural Cacao Flavour, Natural Flavours, Vegetable Gum, Certified Organic Stevia.

Packed in a facility that also packs dairy, nuts and dried fruit.

DAY 1
FIRST SHAKE
  • Smooth and creamy, tastes like a treat
  • Sits light – no bloat, no gut drama
WEEK 1
IT SLOTS IN
  • Digestion settled - easy daily protein without extra calories
  • The routine locks in: shakes, oats, smoothies
WEEKS 2-3
RECOVERY
  • Faster recovery between sessions, less lingering soreness
  • Hitting your protein target feels automatic
WEEKS 4+
LEAN PROGRESS
  • Steady lean-muscle progress without the calorie baggage
  • You notice it most on the days you skip it

27.8g of grass-fed whey isolate per serve - 99.9% lactose-free.

Individual results vary. Reflects what customers commonly report with daily use alongside training.

Grass-Fed Whey Isolate

Grass-Fed Whey Isolate

From pasture-raised, grass-fed cows - 27.8g of protein per 30g serve at 90% purity. Grass-fed whey carries naturally higher omega-3s and CLA than grain-fed.

Cold-Processed

Cold-Processed

Filtered at low temperature to preserve the natural protein structure that heat-treated whey loses. No heat damage, no chemical processing.

99.9% Lactose-Free

99.9% Lactose-Free

Isolate filtering removes almost all the lactose - the main reason standard whey sits heavy. Most lactose-sensitive customers report no issues.

Naturally Sweet

Naturally Sweet

Flavoured naturally and sweetened with organic stevia. Just 3 main ingredients - nothing on the label you can't read.

How To Use

SCOOP

SCOOP

1 scoop, once a day - training days and rest days

SHAKE

SHAKE

250-300ml of cold water for the leanest serve, or milk for creamier

DRINK

DRINK

Post-training, breakfast, or whenever protein's the gap

COOK

COOK

Or stir into oats, yoghurt and baking - it mixes clean, no clumping

  • 5 stars: 70 (99%)
  • 4 stars: 1 (1%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
P
Pete H
My forever protein

I’m 69 year old and train hard (Weights, Rucking and Ocean paddling) six days a week. It’s common knowledge now that the older you get the more you need protein. My problem was long standing gut issues which were only exasperated by protein powder, making it difficult to enjoy my way of life. I’ve tried just about every whey protein both here in Australia and some overseas brands. Tuff was my final resort, given the lack of nasty fillers etc. Just finished my third kilogram of the Whey isolate and ‘NO’ gut issues, great taste and it’s Australian. I’m sold and, my wife is buying her first kilogram in my next order. Fantastic product guys. Thanks.

R
Reginald F.
Fits My Approach to Nutrition

Simple, practical and easy to use. That's exactly what I was looking for.

M
Marlene W.
Supports Consistency

Consistency is what matters most and this helps make that easier.

S
Stanley C.
A Product I'll Keep Using

It has earned a permanent place in my nutrition routine.

L
Lorraine B.
Great for Planning Ahead

Makes it easier to stay prepared rather than scrambling for options.

N
Norbert R.
A Useful Pantry Staple

It's one of those products I like to keep stocked at all times.

W
Wanda T.
Good Addition to a Balanced Diet

I see it as a useful supplement to my normal food intake.

A
Anonymous
Great taste and mixes well

Great taste and mixes well, no lumps

M
Marvin H.
Flexible Enough for Different Goals

It works whether I'm focusing on training, maintenance or general health habits.

G
Gloria S.
Makes Healthy Choices Easier

Having this available encourages better nutrition decisions throughout the day.

C
Clifford M.
Doesn't Require Much Preparation

A shaker bottle and water are all I need.

J
Joyce D.
Great for Routine Builders

If you enjoy structure and consistency, this fits nicely into that approach.

H
Harold V.
Works Well Year-Round

I've found it useful regardless of the season or training phase.

D
Diane O.
Easy to Keep on Hand

I always like having a tub available because it solves a lot of nutrition challenges.

K
Kenneth A.
Pleasantly Surprised by the Texture

Texture is often overlooked, but this was better than I expected.

E
Eugene P.
Makes Recovery More Convenient

Having something quick available after training has made recovery nutrition easier.

B
Barbara J.
Good for Long Workdays

It's become a useful part of getting through long days at work.

P
Patricia E.
Great With Ice

Blended with ice, it becomes a really enjoyable drink.

R
Raymond G.
Works Around My Schedule

My days are unpredictable, so convenience matters. This delivers that.

J
Janet K.
Better Daily Consistency

Since adding this in, I've been much more consistent with my protein intake.

G
Gerald L.
Clean and Straightforward

I appreciate products that don't try to be everything at once.

H
Hayden Demasi
Vanilla
Really enjoying the protein shake

Really enjoying the protein shake powders

K
Kathleen N.
Useful on Low-Appetite Days

Some days I don't feel like eating much. This has been a helpful option.

R
Ronald F.
Makes Nutrition Less Stressful

It's one less thing I need to think about during a busy day.

Tuff WPI vs Typical Whey Protein

See how our grass-fed, cold-processed isolate compares to typical grain-fed whey.

Brand Logo Typical Whey
Grass-fed, pasture-raised dairy ✓ ✕ Usually grain-fed
99.9% lactose-free ✓ ✕ Higher lactose - a common bloat trigger
Cold-processed to protect the protein ✓ ✕ Often heat-treated
Naturally sweetened (organic stevia) ✓ ✕ Often sucralose or acesulfame-K
No amino acid spiking ✓ ✕ Aminos added to inflate the protein number
Just 3 main ingredients ✓ ✕ Often 5+ - more ingredients, less whey per serve
WHO IT'S FOR

If any of these are you

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DAIRY USUALLY UPSETS YOU

99.9% lactose-free - most lactose-sensitive customers report no issues. Start with a sample if you're highly sensitive.

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YOU'RE CUTTING OR RECOMPING

Less than 1g of fat and carbs per serve - maximum protein, minimum calories.

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YOU TRAIN HARD

Fast-absorbing isolate backing up recovery between heavy sessions.

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YOU'RE IN IT FOR THE LONG RUN

Training isn't a phase. You want to recover well, stay strong, and still be turning up in twenty years.

FAQs

Frequently asked questions

Unlikely. Our WPI is 99.9% lactose-free with no artificial sweeteners and just 3 main ingredients - lactose and artificial additives are the main causes of bloating in most protein powders. The majority of our customers report zero digestive issues, including those who are lactose intolerant.

The WPI is pure whey isolate - 27.8g protein, less than 1g fat and carbs, 99.9% lactose-free. It's the leanest option. Rebuild combines whey isolate and concentrate with 5g of hydrolysed collagen peptides to support joints, tendons, skin and recovery alongside muscle. Choose WPI for maximum protein with minimum calories. Choose Rebuild if you want muscle and structural support in one serve.

Smooth and creamy with no artificial aftertaste. We use organic stevia and natural flavouring only - no sucralose, no acesulfame-K, no chemical sweetness. If you're not sure, grab a single-serve sample before committing to a full tub.

Yes. It mixes clean into oats, yoghurt, pancake batter, smoothie bowls and baking. No clumping. The neutral sweetness from stevia works well in both sweet and savoury recipes.

Our WPI is 99.9% lactose-free. Most lactose-intolerant customers report no issues. If you're highly sensitive, start with a single-serve sample to test your tolerance before buying a full tub.

Grass-fed whey comes from pasture-raised cows and contains higher levels of omega-3 fatty acids and CLA than grain-fed alternatives. Our whey is also cold-processed, which preserves the natural protein structure that heat-treated whey loses. Better source, better processing, better protein.