Natural Whey Protein Isolate

Sourced from grass fed, 100% hormone free cows makes Bulk Nutrients' Natural WPI one of the cleanest and purest whey protein options available.

4.7 from 75 reviews. Read all reviews or leave your own.
  • Lactose Free
  • Gluten Free Ingredients
  • Vegetarian
  • Vegan
  • Taste
  • Mixability
  • Effectiveness
  • Value for Money

Pay your way! Checkout with AfterPay or Zip Pay when your order is over $100 AUD. Find out more

Great prices when buying in Bulk

  • 1kg = AU$48
  • 2kg = AU$84 (AU$42 each)
  • 3kg = AU$120 (AU$40 each)
  • 4kg = AU$153 (AU$38.25 each)
  • 5kg = AU$182 (AU$36.40 each)

All natural ingredients

Lean Muscle Growth

Ultra low in fats & carbs

Natural Whey Protein Isolate WPI

All natural ingredients, GMO free

Bulk Nutrients natural Whey Protein Isolate (WPI) is one of the cleanest and purest whey proteins available in the world. It comes from grass fed cows and is 100% hormone free. Our Natural WPI contains virtually no lactose, and being extremely low in both fat and carbs, it is an ideal post training/exercise protein shake.

Our Whey Protein Isolate is manufactured using cross flow micro filtration, and is naturally rich in branched chain and essential amino acids (BCAAs and EAAs) and is therefore perfect for muscle recovery and repair. High in protein at 91% it has less than 1gram (g) of fat or carbs per serve.

All natural flavours and sweetened with natural Stevia

Our Natural WPI is great tasting and we use only natural flavours and sweeten with stevia to ensure an all natural product.

We use natural cocoa and vanillan at the lowest inclusion rate to ensure our natural Whey Protein Isolate is pure and also great tasting.

Directions & Ingredients


30 grams (approximately 1 level scoop) after training for maximum nutritional benefit, or anytime during the day for a low fat snack replacement or to boost your protein intake.

Directions for Natural Whey Protein Isolate

Combine powder with 300-400ml of water or low fat milk and consume immediately.

We suggest you check out Protein Flavour & Sweetness Tweaking for information on how best to mix Natural WPI.


Chocolate flavour
100% Grass Fed Whey Protein Isolate, Natural Cocoa, Natural Sweetener (Stevia).

Vanilla flavour
100% Grass Fed Whey Protein Isolate, Natural Vanilla Flavouring, Natural Sweetener (Stevia).


Contains Dairy, Soy Lecithin.

Soy Lecithin is added by the raw whey manufacturer to aid mixability. The inclusion rate is extremely low and will not affect those with allergies.


Keep well sealed, protect from moisture, light and heat.

Frequently asked questions about Natural Whey Protein Isolate

How does Natural Whey Protein Isolate taste?

Natural Whey Protein Isolate is considered to have a pleasant taste. Natural/raw is generally considered to have a neutral taste.

What is Natural Whey Protein Isolate made from?

Natural Whey Protein Isolate is a protein derived from milk.

Are samples of Natural Whey Protein Isolate available?

If it's in stock and listed on our sample form here, you can request one!

How is Natural Whey Protein Isolate packaged?

Natural Whey Protein Isolate is packaged in resealable 1kg pouches.

Is the packaging for Natural Whey Protein Isolate recyclable?

Yes! The bag can be recycled by placing it in the REDcycle drop off point bins. The included scoop can be recycled as a hard plastic in your local council pickup.

If you'd like more information, check this article which breaks down how Bulk's various products' packaging can be recycled.

Can I receive a discount buying more than one of this product at once?

Absolutely! Price breaks for Natural Whey Protein Isolate begin when you purchase 2 units of any flavour. Just add more than that to your cart to see the savings.

Natural WPI Lab Testing Results

At Bulk Nutrients we take our products’ purity very seriously.

To maintain our Natural WPI’s consistent high quality, we send a cross section of our product range away to be tested for protein purity by the National Measurement Institute (NMI) each month.

The NMI is a laboratory run by the Australian Government, which is used for police forensic testing, ASADA drug screening and by multinational food manufacturers for quality and safety testing.

NMI has conducted many hundreds of tests on Bulk Nutrients products for more than 6 years.

Lab testing results for Natural WPI.


Recipes containing Natural WPI

The Recipe Section of the Bulk Nutrients Blog now has over 300 healthy recipes.

Here are some of our favourites that use Natural Whey Protein Isolate:

Natural WPI Nutrition Panels

Chocolate Natural WPI Nutrition Information
Servings per 1kg package: 33 Servings size: 30g
Average Quantity Per Serving Average Quantity Per 100g
Energy (kj) 472 1572
Protein (g) 26 86.7
Fats (g) 0.4 1.4
  (saturated) (g) 0.3 1.0
Carbohydrates (g) 0.5 1.7
  (sugars) (g) 0.5 1.5
Sodium (mg) 62 205
Vanilla Natural WPI Nutrition Information
Servings per 1kg package: 33 Servings size: 30g
Average Quantity Per Serving Average Quantity Per 100g
Energy (kj) 479 1598
Protein (g) 26.7 89.0
Fats (g) 0.3 1.0
  (saturated) (g) 0.2 0.7
Carbohydrates (g) 0.3 0.9
  (sugars) (g) 0.3 0.9
Sodium (mg) 55 184
Typical Natural WPI Amino Acid Profile
Average Quantity Per Serving Average Quantity Per 100g
Alanine (mg) 1379 4597
Arginine (mg) 726 2420
Aspartic Acid (mg) 3023 10077
Cysteine (mg) 967 3223
Glutamic Acid (mg) 4257 14190
Glycine (mg) 435 1450
Histidine (mg) 484 1613
Isoleucine (mg) 1524 5080
Leucine (mg) 3459 11530
Lysine (mg) 2709 9030
Methionine (mg) 580 1933
Phenylalanine (mg) 919 3063
Proline (mg) 1088 3627
Serine (mg) 1088 3627
Threonine (mg) 1282 4273
Tryptophan (mg) 580 1933
Tyrosine (mg) 1016 3387
Valine (mg) 1354 4513

Bulk Nutrients is proudly Australian owned and operated with all products developed, blended and packed locally in our facility in Grove, Tasmania, Australia.Find out more!

Natural Whey Protein Isolate Reviews

How PayPal Works
Afterpay and Zip Pay available for orders over $100*
Compare all Bulk Nutrients proteins