Whey Protein Isolate

4.8 from 6845

Sourced from grass-fed cows, Bulk Nutrients' WPI is ultra-high protein. Vanilla Flavour.

Bulk Nutrients' WPI is ultra-high protein, sourced from grass-fed cows. Choc Peanut Flavour

Sourced from grass-fed cows, Bulk Nutrients' WPI is rich in protein. Chocolate Flavour

Whey Protein Isolate

4.8 from 6845

Highest Protein

Post workout

Whey Protein Isolate (WPI) has one of the lowest amounts of fats and carbs in any protein.

Low fats & carbs

Product Overview

Rewards & Easy Instalments

Availability

Multibuy Discounts

Save on Whey Protein Isolate with multibuy discounts. Add 2 or more bags of any flavour to your cart and start saving.

Price Per Bag

1kg = $48.00
2kg (2 x 1kg) bags = $46.50 each
3kg (3 x 1kg) bags = $45.67 each
4kg (4 x 1kg) bags = $45.25 each
5kg (5 x 1kg) bags = $44.20 each
10kg (10 x 1kg) bags = $43.70 each

$48.00

Full product details

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Whey Protein Isolate (WPI) Protein Powder

Q: How does Whey Protein Isolate taste?

WPI is flavoured and is generally considered to have a pleasant taste.

Q: What is WPI made from?

Whey Protein Isolate is a protein derived from milk.

Q: Are WPI samples available?

Yes, you can request a free sample of Whey Protein Isolate from our Free Sample page.

Q: How is Bulk Nutrients' WPI packaged?

Bulk Nutrients' Whey Protein Isolate is packaged in resealable 1kg pouches.

Q: Can I purchase WPI in smaller sizes?

Yes - WPI is also available in single-serve sachets which we call WPI Sample Packs .

Q: Is the packaging for this product recyclable?

In theory yes, but not in all council areas right now. The REDcycle program has been discontinued, and the industry is working together to find a solution to continue recycling soft plastics. For now, we recommend checking with your local council, but most require you to put the packaging in your regular landfill bin. The included scoop can be recycled as hard plastic in your local council pickup. For more information about what Bulk is doing to improve sustainability, check this article .

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

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

Q: Does Bulk do a Natural version of WPI?

We sure do! Our Natural Whey Protein Isolate is one of the cleanest and most pure whey proteins available on the market. Bulk Nutrients’ Natural WPI comes from grass fed cows and is 100% hormone free so you can be confident in the protein you’re using. Natural WPI also contains virtually no lactose, and is extremely low in both fat and carbs, while maintaining 91% protein per serve. We use natural flavours and stevia to sweeten to ensure our Natural WPI remains all natural.

Q: Does Bulk do a WPI safe for use in tested sports?

Absolutely! We’re really proud that two flavours of our WPI are regularly HASTA tested, and are HASTA certified to support natural athletes and competitors with their training and recovery. Currently we range our HASTA WPI in both Vanilla and Chocolate flavours and they’re used by a range of our ambassadors and sporting teams we work with.

Q: Why is Whey Protein Isolate the best choice?

Whey Protein Isolate has the highest biological value of any protein source and WPI is the most processed and purest form of Whey Protein. WPI contains around 1% fats, 1% carbohydrates and around 90% of protein. As it is rapidly absorbed, it is ideal post workout, especially when training in a fasted state.

Bulk Nutrients' Whey Protein Isolate (WPI) comes from grass-fed, hormone (rbST) free cows. It is a low-temperature cross and ultra-filtered whey protein that remains completely undenatured.

Buy Whey Protein Isolate Online

We believe it is one of the purest Whey Protein Isolates on the market, with high levels of protein and lower levels of fats, carbohydrates and sodium.

Our Whey Protein Isolate is naturally rich in amino acids, particularly branched chain amino acids (BCAAs) and essential amino acids (EAAs), which support optimum muscle growth in conjunction with a healthy diet (, ).

Why should you use Whey Protein Isolate (WPI)?

Bulk Nutrients' WPI is an exceptionally pure protein source, with much of the fat and lactose typically found in Whey Protein Concentrate filtered out.

WPI is fast absorbing and can help build lean muscle ()
Taken after a workout, WPI assists in recovery ()
WPI can help to increase protein synthesis
Whey Protein Isolate can help to boost the immune system ()
Bulk Nutrients WPI is low in fats and carbs and has a negligible lactose content

Bulk WPI Lovers

Want to get featured with your tasty Bulk WPI? Tag us with #bulknutrients on Insta and we'll do the rest.

A great selection of WPI flavours on offer...

Bulk Nutrients uses only the strongest sweetener available in our flavoured Whey Protein Isolate, which ensures an exceptionally pure finished product.

With flavours on offer like Chocolate WPI, Vanilla WPI, Banana WPI, Choc Ice Cream WPI, which is like eating Neapolitan Ice Cream, Choc Honeycomb WPI and Salted Caramel WPI, to name a few.

And, because we use the strongest flavours available, we only need to include them as a fraction of the overall product which ensures an exceptionally pure WPI from Bulk Nutrients.

WPI vs WPC, which is better?

WPI and WPC come from the same source. Here are the benefits they both offer.

WPI and WPC are both rapidly absorbing proteins
Both WPI and WPC are great to consume after training ()
They both contain minimal fats and carbohydrates per serve
Both offer a great range of delicious flavours

The main difference... WPI is a more refined version of WPC and, because of this, offers significantly less lactose per serve.

So, if you are very sensitive to lactose and can’t live without whey or after a higher protein hit, give WPI a go!

WPI stacks well with other supplements in shakes...

Bulk Nutrients’ WPI is great in a protein shake with other muscle-building and performance-based supplements. We believe it is best used with...

Carbohydrate powders such as Carb+
L Glutamine to help retain muscle whilst dieting
Creatine Monohydrate, one of the best value and researched supplements available ()

If you're after the fastest absorbing and most bioavailable protein source, choose Bulk Nutrients WPI.

Fast shipping on Whey Protein Isolate

At Bulk Nutrients, we offer $9 flat rate shipping and express postage for all orders 3.5kgs and under. Orders travelling to New Zealand go by Express Post up to 2kg.

It's a very regular occurrence for Bulk Nutrients customers in capital cities to order one afternoon and have their order on their doorstep the following morning!

Bulk Nutrients’ WPI is an all round protein

Whey Protein Isolate (WPI) is an all-around protein source, so it is suitable for everyone from endurance athletes to strength athletes.

WPI is great for aiding recovery, strength and muscle levels as well as boosting the immune system.

If you're looking for a quick and easy high-protein breakfast, look at High Protein Overnight Oats. Or you might like to check out our other Salted Caramel / Choc Honeycomb flavoured proteins.

About Whey Protein Isolate

Whey Protein Isolate (WPI) is considered the industry standard for dairy protein quality and is made during the cheese making process. As it’s the most highly refined version of whey protein, Whey Protein Isolate has the highest level of protein and the lowest level of fats and carbohydrates.

Containing only traces of lactose, it is easily digestible and can be enjoyed by those with sensitive stomachs. Whey Protein Isolate has high levels of branched chain amino acids and essential amino acids, with a thorough spread of conditional and non-conditional amino acids.

Directions & Ingredients

WPI Dosage

Dosage size - 30 grams (approx. 1 flat scoop) of WPI — Dosage size - 30 grams (1 scoop) of WPI

30 grams (approximately 1 flat scoop) after training for maximum nutritional benefit, or anytime during the day for a low fat snack replacement or to boost your protein intake. For the greatest accuracy, we recommend following our guide here.

Directions for Whey Protein Isolate

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

WPI Ingredients

Ingredients: Whey Protein Isolate (Milk), Flavouring, Sweetener (Sucralose).

Contains: Milk.

Note: Chocolate based flavours contain cocoa. Salted Caramel and Spiced Caramel Biscuit contains salt. Raw does not contain any flavours or sweetener. Choc Peanut is nut allergen free (no actual nuts in the flavouring, synthetic flavours) still has dairy allergens.

Storage

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

What is Whey Protein?

Posted by Ben Crowley
Estimated reading time: 10 minutes

Detailed comparison of Whey Protein Concentrate and Whey Protein Isolate

Whey Protein Isolate vs Concentrate: A Detailed Comparison

Posted by Mason Brezinscak
Estimated reading time: 8 minutes

How WPI Can Maximise Your Bulking Phase

Posted by Jackson Peos
Estimated reading time: 10 minutes

How to Have a High-Calorie Weekend Meal and Still Lose Weight

Posted by Bulk Nutrients
Estimated reading time: 6 minutes

The Role of Nutrition in Immune Function

Posted by Jackson Peos
Estimated reading time: 11 minutes

Bulk Ambassador Tarran Lee enjoying a shaker full of Bulk Nutrient's Whey Protein Isolate WPI

How Protein Powder Actually Helps You Lose Weight and Keep It Off

Posted by Bulk Nutrients
Estimated reading time: 5 minutes

Perfecting Your Protein Shake

Posted by Bulk Nutrients
Estimated reading time: 2 minutes

Can Protein Powder Be Used for Weight Loss?

Posted by Mason Brezinscak
Estimated reading time: 11 minutes

Frequently Asked Questions about WPI

How does Whey Protein Isolate taste?

What is WPI made from?

Are WPI samples available?

How is Bulk Nutrients' WPI packaged?

Can I purchase WPI in smaller sizes?

Is the packaging for this product recyclable?

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

Does Bulk do a Natural version of WPI?

Does Bulk do a WPI safe for use in tested sports?

Why is Whey Protein Isolate the best choice?

Is Whey Protein Isolate lactose free?

Does Whey Protein Isolate contain gluten?

How many serves of WPI should I have each day?

What is the standard dose of WPI powder?

How long after a workout should I have WPI?

Why is WPI better than eating tuna, meat or drinking milk?

How soon should I drink WPI after mixing it with water?

Whey Protein Isolate Recipes

High Protein Overnight Oats

Posted by Ben Crowley
Recipe difficulty: Easy

Overnight Weetbix Recipe

Posted by Bailey McDougall
Recipe difficulty: Easy

Cookies and Cream Protein Bars

Posted by Caroline Fitzgerald
Recipe difficulty: Moderate

Nutty Caramel Brownies

Posted by Bulk Nutrients
Recipe difficulty: Moderate

High Protein Apple Crumble

Posted by Nicole Frain
Recipe difficulty: Moderate

Chocolate Berry Pancakes with Oat Crumble recipe from Bulk Nutrients

Epic Protein Smoothies

Posted by Nicole Frain
Recipe difficulty: Easy

High Protein Nutty Cranberry Balls

Posted by Nicole Frain
Recipe difficulty: Easy

Choc Chip Protein Bars

Posted by Nicole Frain
Recipe difficulty: Moderate

Whey Protein Isolate Lab Testing Results

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

To maintain our Whey Protein Isolate’s consistent high quality, we send a cross-section of our product range to certified Australian laboratories for testing, such as National Measurement Institute (NMI), Southern Cross University and Biotest which are all independently verified and NATA accredited.

The NMI is a laboratory run by the Australian Government, which is used for police forensic testing, SIA - Sports Integrity Australia 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 Whey Protein Isolate (WPI)

WPI Nutrition Panels

CHOCOLATE BASED FLAVOURS NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	484	1,612
Protein (g)	25.6	85.5
Fats(g)	0.5	1.6
(saturated) (g)	0.3	1.1
Carbohydrates (g)	1.3	4.5
(sugars) (g)	0.3	1.0
Sodium (mg)	55	182.8

VANILLA NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	481	1,602
Protein (g)	26.6	88.5
Fats(g)	0.3	1.0
(saturated) (g)	0.2	0.7
Carbohydrates (g)	0.9	2.9
(sugars) (g)	0.2	0.8
Sodium (mg)	54	179

BANANA NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	481	1,604
Protein (g)	26.6	88.8
Fats(g)	0.3	1.0
(saturated) (g)	0.2	0.8
Carbohydrates (g)	0.8	2.7
(sugars) (g)	0.2	0.7
Sodium (mg)	54	179

CHOC PEANUT NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	483	1,611
Protein (g)	25.2	84.0
Fats(g)	0.5	1.6
(saturated) (g)	0.3	1.1
Carbohydrates (g)	1.8	6.0
(sugars) (g)	0.3	1.0
Sodium (mg)	54	179

COOKIES & CREAM NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	482	1,607
Protein (g)	26.6	88.5
Fats(g)	0.3	1.0
(saturated) (g)	0.2	0.7
Carbohydrates (g)	0.9	3.0
(sugars) (g)	0.4	1.4
Sodium (mg)	54	179

ICED COFFEE NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	473	1,577
Protein (g)	26.0	86.8
Fats(g)	0.3	1.1
(saturated) (g)	0.1	0.2
Carbohydrates (g)	1.0	3.3
(sugars) (g)	0.2	0.6
Sodium (mg)	54	181

RAW (UNFLAVOURED) NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	492	1,640
Protein (g)	27.0	90.0
Fats(g)	0.4	1.2
(saturated) (g)	0.3	1.0
Carbohydrates (g)	0.7	2.4
(sugars) (g)	0.2	0.6
Sodium (mg)	47	156

SALTED CARAMEL NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	479	1,595
Protein (g)	26.3	87.8
Fats(g)	0.3	1.0
(saturated) (g)	0.2	0.7
Carbohydrates (g)	1.0	3.2
(sugars) (g)	0.3	0.9
Sodium (mg)	122	406

SPICED CARAMEL BISCUIT NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	476	1,587
Protein (g)	25.6	85.4
Fats(g)	0.3	1.1
(saturated) (g)	0.2	0.8
Carbohydrates (g)	1.5	4.9
(sugars) (g)	0.7	2.3
Sodium (mg)	92	308

STRAWBERRY NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	481	1,603
Protein (g)	26.4	87.9
Fats(g)	0.3	1.0
(saturated) (g)	0.2	0.7
Carbohydrates (g)	1.1	3.6
(sugars) (g)	0.2	0.7
Sodium (mg)	53	177

VANILLA MAPLE NUTRITION INFORMATION
Servings per 1kg package: 33Serving size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Energy (kj)	480	1,601
Protein (g)	25.8	86.1
Fats(g)	0.3	1.0
(saturated) (g)	0.2	0.7
Carbohydrates (g)	1.6	5.4
(sugars) (g)	0.4	1.3
Sodium (mg)	53	177

TYPICAL WHEY PROTEIN ISOLATE AMINO ACID PROFILE
Servings per 1kg package: 33Servings size: 30g
	Average Quantity Per Serving	Average Quantity Per 100g
Alanine (mg)	1,379	4,597
Arginine (mg)	726	2,420
Aspartic Acid (mg)	3,023	10,077
Cysteine (mg)	967	3,223
Glutamic Acid (mg)	4,257	14,190
Glycine (mg)	435	1,450
Histidine (mg)	484	1,613
Isoleucine (mg)	1,524	5,080
Leucine (mg)	3,459	11,530
Lysine (mg)	2,709	9,030
Methionine (mg)	580	1,933
Phenylalanine (mg)	919	3,063
Proline (mg)	1,088	3,627
Serine (mg)	1,088	3,627
Threonine (mg)	1,282	4,273
Tryptophan (mg)	580	1,933
Tyrosine (mg)	1,016	3,387
Valine (mg)	1,354	4,513

References

Wolfe RR. Branched-chain amino acids and muscle protein synthesis in humans: myth or reality?. J Int Soc Sports Nutr. 2017;14:30. Published 2017 Aug 22. doi:10.1186/s12970-017-0184-9 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5568273/
Pal, S., & Ellis, V. (2010). The acute effects of four protein meals on insulin, glucose, appetite and energy intake in lean men. The British journal of nutrition, 104(8), 1241–1248. PMID: 20456814 - https://www.cambridge.org/core/journals/british-journal-of-nutrition/article/acute-effects-of-four-protein-meals-on-insulin-glucose-appetite-and-energy-intake-in-lean-men/E8FE7C1BF5FBCB7F2C1C0A99B63C0B3D
Naclerio F, Larumbe-Zabala E. Effects of Whey Protein Alone or as Part of a Multi-ingredient Formulation on Strength, Fat-Free Mass, or Lean Body Mass in Resistance-Trained Individuals: A Meta-analysis. Sports Med. 2016 Jan;46(1):125-137. doi: 10.1007/s40279-015-0403-y. PMID: 26403469 - https://pubmed.ncbi.nlm.nih.gov/26403469/
Cintineo HP, Arent MA, Antonio J, Arent SM. Effects of Protein Supplementation on Performance and Recovery in Resistance and Endurance Training. Front Nutr. 2018;5:83. Published 2018 Sep 11. doi:10.3389/fnut.2018.00083. PMID: 30255023 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6142015/
Ha DJ, Kim J, Kim S, Go GW, Whang KY. Dietary Whey Protein Supplementation Increases Immunoglobulin G Production by Affecting Helper T Cell Populations after Antigen Exposure. Foods. 2021 Jan 19;10(1):194. doi: 10.3390/foods10010194. PMID: 33477967; PMCID: PMC7835905 - https://pubmed.ncbi.nlm.nih.gov/33477967/
Kreider RB, Campbell B. Protein for exercise and recovery. Phys Sportsmed. 2009 Jun;37(2):13-21. doi: 10.3810/psm.2009.06.1705. PMID: 20048505 - https://pubmed.ncbi.nlm.nih.gov/20048505/
Cooper, R., Naclerio, F., Allgrove, J. and Jimenez, A., 2021. Creatine supplementation with specific view to exercise/sports performance: an update - https://jissn.biomedcentral.com/articles/10.1186/1550-2783-9-33

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Whey Protein Isolate

Whey Protein Isolate

Price Per Bag

Package Size - 1kg

Customers also bought

Whey Protein Isolate (WPI) Protein Powder

Buy Whey Protein Isolate Online

Why should you use Whey Protein Isolate (WPI)?

Bulk WPI Lovers

A great selection of WPI flavours on offer...

WPI vs WPC, which is better?

WPI stacks well with other supplements in shakes...

Fast shipping on Whey Protein Isolate

Bulk Nutrients’ WPI is an all round protein

About Whey Protein Isolate

Directions & Ingredients

WPI Dosage

Directions for Whey Protein Isolate

WPI Ingredients

Storage

Further Reading on Whey Protein Isolate

What is Whey Protein?

Whey Protein Isolate vs Concentrate: A Detailed Comparison

How WPI Can Maximise Your Bulking Phase

How to Have a High-Calorie Weekend Meal and Still Lose Weight

The Role of Nutrition in Immune Function

How Protein Powder Actually Helps You Lose Weight and Keep It Off

Perfecting Your Protein Shake

Can Protein Powder Be Used for Weight Loss?

Frequently Asked Questions about WPI

How does Whey Protein Isolate taste?

What is WPI made from?

Are WPI samples available?

How is Bulk Nutrients' WPI packaged?

Can I purchase WPI in smaller sizes?

Is the packaging for this product recyclable?

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

Does Bulk do a Natural version of WPI?

Does Bulk do a WPI safe for use in tested sports?

Why is Whey Protein Isolate the best choice?

Is Whey Protein Isolate lactose free?

Does Whey Protein Isolate contain gluten?

How many serves of WPI should I have each day?

What is the standard dose of WPI powder?

How long after a workout should I have WPI?

Why is WPI better than eating tuna, meat or drinking milk?

How soon should I drink WPI after mixing it with water?

Whey Protein Isolate Recipes

High Protein Overnight Oats

Overnight Weetbix Recipe

Cookies and Cream Protein Bars

Nutty Caramel Brownies

High Protein Apple Crumble

Epic Protein Smoothies

High Protein Nutty Cranberry Balls

Choc Chip Protein Bars

Whey Protein Isolate Lab Testing Results

Lab testing results for Whey Protein Isolate (WPI)

WPI Nutrition Panels

References

Whey Protein Isolate Reviews

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