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.

  • Lactose Free
  • Gluten Free Ingredients
  • Vegetarian
  • Vegan
  • Taste
  • Mixability
  • Effectiveness
  • Value for Money

... or make 4 interest-free payments of AU$12.00 when your order is over AU$100 Afterpay 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.


30 grams (approximately 1 level scoop) after training for maximum nutritional benefit, or anytime during the day for a low fat meal replacement.

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 Vanillin, Natural Sweetener (Stevia).

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


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.

Further Reading


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:

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

Formulated Supplementary Sports Food. Not suitable for children under 15 years of age or pregnant women. Should only be used under medical or dietic supervision. This product is not a sole source of nutrition and should be consumed in conjunction with a nutritious diet and appropriate physical training or exercise program.

Write a Review

Natural Whey Protein Isolate Reviews

  • 5
    Really good protein

    One off the best tasting protein I've tried

  • 5

    I was after a subtle vanilla flavoured protein powder and that is exactly what I got! I am not a fan of the fake, overpowering vanilla powders on the market and was over the moon to come across this product. Will be staying with the product for future purchases :)

  • 5
    Natural Whey Protein Isolate WPI

    The flavour is different from other chocolate WPI's I have used but it is still very tasty. I generally mix 1 scoop with about 1 cup of water and it mixes very well and I have experienced NO lumps as with other brands I have used. overall I feel it is a good mix and I really enjoy it.

  • 5

    High quality and great tast!! This is my favourite dairy protein powder.

  • 4
    Great taste

    Great tasting and very soluble in water or coconut water. Only thing that could improve on is the packaging, the seal has detached from packaging.

  • 5
    Taste great & great value for money

    I enjoy this protein powder & highly recommend it to anyone looking for a quality protein powder

  • 5
    Natural Whey Protein Isolate

    This is by far the best tasting protein I have had. I use it at my gym and all my clients love it. Easy to mix, and amazing quality.

  • 4
    Whey powder

    I am very happy with the product, however a couple of times when I have received my order the pack has been slightly ripped. This has resulted in losing some of the whey which I’m not happy about. So better packaging is recommended.

  • 4
    Awesome natural product

    Bought this as a substitute for Protein Matrix ( amazing also). Just wanted something with a little less artificial ingredients. Only tried the vanilla, has a slightly odd tinge to it but still an enjoyable tasty shake. Will try Chocolate after this one. Nice one BN!

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