We have made improvements to our Banana flavour based on feedback from customers.
Highest Protein
Taken post workout
Ultra low fats & carbs
Whey Protein Isolate (WPI) Protein Powder
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 which 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.
Why should you use Whey Protein Isolate (WPI)?
Bulk Nutrients’ WPI is an exceptionally pure protein source, with much of the fat and lactose normally found in Whey Protein Concentrate filtered out.
- WPI is fast absorbing and can help build lean muscle
- Taken post 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 neglible 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 Whey Protein Isolate, Vanilla WPI, Banana Whey Protein Isolate, Peppermint Slice Whey Protein Isolate, Choc Honeycomb WPI and Salted Caramel Whey Protein Isolate 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.
Watch Lindsay and Sam chat about Bulk Nutrients’ WPI
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 then give WPI a go!
WPI stacks well with other supplements in shakes…
Bulk Nutrients’ WPI is great to have 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
So if you want the fastest absorbing and most bioavailable protein source, choose Bulk Nutrients WPI.
Fast shipping on Whey Protein Isolate
At Bulk Nutrients we offer $7 flat rate shipping and express postage for all orders 3.5kgs and under.
It’s a very regular occurance for Bulk Nutrients customers in captial 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 round protein source, so it caters for everyone from endurance athletes to strength athletes.
WPI is great to aid recovery, strength and muscle levels as well as boosting the immune system.
Directions & Ingredients
Dosage
30 grams (approx. 1 densely packed rounded 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 greatest accuracy we recommend occasionally check weighing your dosage.
Directions for 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 WPI.
Ingredients
Cross and Ultra Filtered Whey Protein Isolate (WPI), Flavour, Sweetener (Sucralose).
- Chocolate based flavours (Chocolate, Choc Peanut, Choc Honeycomb, Peppermint Slice) contain cocoa.
- Raw (Unflavoured) contains zero sweeteners or flavourings.
Allergens
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.
Storage
Keep well sealed, protect from moisture, light and heat.
Frequently Asked Questions about WPI
How does Whey Protein Isolate taste?
WPI is flavoured and is generally considered to have a pleasant taste.
What is made from?
Whey Protein Isolate is a protein derived from milk.
Are samples available of this product?
Yes, you can request a free sample of Whey Protein Isolate from our Free Sample page.
How is it packaged?
Bulk Nutrients’ Whey Protein Isolate is packaged in resealable 1kg pouches.
Can I purchase WPI in smaller sizes?
Yes – WPI is also available in single serve sachets which we call WPI Travel Packs.
Is the packaging for this product 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 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 on Whey Protein Isolate
- How whey protein is made?
- Perfecting Your Protein Shake
- Whey Protein Buyers Guide: What’s the difference and which should I be using?
- Detailed Comparison: Whey Protein Concentrate vs Whey Protein Isolate
- The Beginners Guide to Supplements for Health and Recovery
- How WPI can maximise your bulking phase
- Stay on track during lockdown with these six wellbeing tips
- All you need to know about muscle memory and returning to the gym post COVID
- The three pillars of health: Your guide to getting back on track in 2021
- Everything you wanted to know about WPI quality but never thought to ask
- Which Bulk Nutrients protein is best for me?
- WPI vs WPC? Which is better and which should I be using?
- Dairy, Lactose and Intolerances
- Fast or Slow Release Proteins. Which is better for you?
Whey Protein Isolate Recipes
As it’s so versatile, any recipe that uses a Bulk Nutrients protein can have it substituted for WPI.
That said, here are some of our favourite recipes using Bulk Nutrients WPI
- Peanut Butter And Jelly Protein Cake
- Espresso Balls
- Raw Protein Cheesecake
- Micellar Casein Mousse
- Choc Cashew Slice
- Choc Mint Protein Sandwich
- Choc Hazelnut Chia Protein Thumbprints
- Choc Mint Raw Protein Cake
- Spiced Apple Winter Oats
- Black Forest and Caramel Apple Pie Smoothies
- Protein Banana Cream Pie
- Chocolate Protein Hedgehog Slice
- Protein Ginger Bread Cookies
- Christmas Spiced Protein Balls
- Protein Gingerbread House
- Protein Snickers Cake
- Protein Nut Spreads
- Salted Caramel Banana Protein Cups
- Protein Coconut Berry Bites
- Tiramisu Chia Protein Pudding
- White Chocolate & Coconut Protein Balls
- Australia Day Lamingtons
- Smoothie Bowls
- Lemon Poppy Hearts with Ricotta Raspberry Filling
- Protein ‘Nutella’ Spread with Bulk Nutrients Protein Pancakes
- Peanut Butter Protein Brownie
- Berry Protein Bliss Bites
- Coconut Oat Protein Cookies
- Seed Honey Snaps
- Caramel Latte Protein Cake
- Easter Protein Cups
- Berry and Coconut Protein Slice
- Bulk Nutrients Protein Ice Cream
- Protein Ice Cream Sandwiches
- Oat Bites In Celebration Of Anzac Day
- Choc Peanut Butter Ripple Protein Cake
- Snickers Protein Smoothie
- Chia Seed Protein Pudding Cup
- Matcha Chocolate Protein Balls
- Epic Protein Smoothies
- Carrot Cake Smoothie
- Banana Pops
- Choc Mint Mousse Dessert
- Halloween Monster Protein Balls
- Peanut Butter Ketogenic Balls
- Protein Popcorn
- Muesli Ice Cream Sandwich
- Healthy Cooking Tricks
- 12 Days of Christmas – Peanut Butter Waffle
- 12 Days of Christmas – Banana Maple Protein Pie
- Protein Jelly Slice
- Banana Bread
- Lamington Slice
- Lemon Cheesecake Smoothie
- Love Stinks Tri Fibre+ Stack
- Cookies and Cream Raspberry Ice Creams
- A High Protein, Nutty Banana Smoothie
- A Protein-Packed Easter Favourite
- An Aussie Classic – Chocolate Weetbix Slice
- Tasty No-Bake Apricot Logs
- An Aussie Classic – Weetbix Protein Balls
- Layered Breakfast Jar
- Raw Banana Caramel Tart
- Protein-packed Apricot Tarts
- Epic Mocha Shake
- Creamy Red Velvet Slice
- Choc Cherry Cups
- Tropical Chia Pudding
- Banana Bread Spread
- Choc Vegemite Slice
- Peanut Butter Overnight Oats
- Creamy White Chocolate Iced Treats
- The Ultimate Dinner – BBQ Chicken Pizza and Protein Milkshakes
- Protein-Packed Dinner – Vegetarian Pizza and Shake
- Raw Protein Hot Cross Buns
- Double Choc Fudge Cake
- Apricot And Raspberry Cookies
- High Protein Brownies
- Protein Chia Puddings
- Choc Protein Dipped Strawberries
- Protein Balls Two Ways
- Protein Cheesecake Smoothie
- Choc Chip Protein Bars
- Protein Popcorn Slice
- High Protein Nut Bars
- High Protein Apple Crumble
- Raw Choc Peppermint Cake
- Nutty Chocolate Slice
- High Protein Carrot Cake
- High Protein Choc Peanut Butter Slice
- Protein Pumpkin Pie
- 12 Days of Christmas – Choc Honeycomb Protein Pavlovas
- Neapolitan Slice
- Berry And Yogurt Protein Pavlovas
- Fruit and Nut Cheese Log
- Caramel and Raspberry Peanut Butter Cups
- Peanut Butter And Weetbix Choc Chip Bites
- Bounty Protein Slices
- Low Carb Hot Cross Buns
- The Protein Super Coffee
- Protein Packed Easter Cup Cakes
- Easy Mango And Berry Protein Pavlova
- Chocolate Chip Peanut Butter Protein Loaf
- Easy Banana and Choc Chip Cupcakes
- Quick and Easy Green Smoothie
- High Protein Pecan Pie
- High Protein Chocolate and Peanut Butter Fudge
- Spiced Zucchini Protein Loaf
- Keto Friendly Rocky Road Ice Cream
- Snack Sized Pecan Protein Bars
- Protein Ginger Bread Cake
- Quick and Easy Coffee Thickshake
- Mini Red Velvet Protein Puddings
- Strawberry and Pineapple Protein Cake
- Mini Choc Peanut Butter Cupcakes
- Double Layer Mocha Cake
- Banana Frozen Yogurt Bites
- High Protein Nutty Cranberry Balls
- Zesty Lemon Protein Teacake
- Crispy Chocolate Quinoa Cookies
- Pistachio And Dark Chocolate Protein Shards
- Oreo Bulking Bar
- High Protein Passionfruit And Weetbix Slice
- Bounty Inspired Protein Cups
- Coconana Nut Cups
- How to make a healthy smoothie in minutes
- Salted Caramel Pretzel Donuts
- No Bake Raspberry Cheesecake
- Top Deck Raspberry Brownies
- Raw Granola Snack Bars
- Ombré Protein Pancake Stack
- Choc Walnut Truffle Bites
- Nutty Caramel Brownies
- Protein Tiramisu
- Moist Mocha and Weetbix Slice
- Raspberry Ripe Slice
- Strawberry Yogurt Cupcakes
- Salted Caramel Cookie Dough Brownie
- Protein Pancakes With Nutty Caramel Sauce
- Strawberry Protein Jelly Slice
- Choc Almond Mini Protein Balls
- Choc Caramel Anzac Slice
- High Protein Chocolate Mini Donuts
- 12 Days of Christmas: Mixed Berry Pavlova
- 12 Days of Christmas: Choc Peanut Butter Ice Creams
- Mocha Protein Balls
- Hemp Protein Granola Bars
- Nutty Tahini Protein Cookies
- Strawberry Ice Cream Cake
- Coffee Protein Frappe
- Raspberry Coconut Protein Balls
- 15 Whey Cool Ways To Use Your Protein
- Nutty Chocolate Slice
- The Protein Super Coffee
- Protein Ginger Bread Cookies
- Creamy Red Velvet Slice
More recipes
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 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 Whey Protein Isolate (WPI).
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👍 👎
WPI Nutrition Panels
| Chocolate Based Flavours Nutrition Information | ||
|---|---|---|
|
Servings per 1kg package: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 480 | 1598.4 |
| Protein (g) | 25.5 | 85.2 |
| Fats (g) | 0.5 | 1.7 |
| (saturated) (g) | 0.4 | 1.2 |
| Carbohydrates (g) | 1.2 | 3.9 |
| (sugars) (g) | 0.3 | 1.0 |
| Sodium (mg) | 55 | 182.8 |
| Vanilla Nutrition Information | ||
|---|---|---|
|
Servings per 1kg package: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 481 | 1602 |
| 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: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 481 | 1604 |
| 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 |
| Christmas Cookie Nutrition Information | ||
|---|---|---|
|
Servings per 1kg package: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 480 | 1600 |
| Protein (g) | 25.4 | 84.8 |
| Fats (g) | 0.3 | 1.0 |
| (saturated) (g) | 0.2 | 0.7 |
| Carbohydrates (g) | 1.9 | 6.4 |
| (sugars) (g) | 1.3 | 4.2 |
| Sodium (mg) | 51 | 171 |
| Choc Peanut Nutrition Information | ||
|---|---|---|
|
Servings per 1kg package: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 483 | 1611 |
| 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: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 482 | 1607 |
| 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: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 473 | 1577 |
| 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: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 492 | 1640 |
| 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: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 479 | 1595 |
| 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 |
| Strawberry Nutrition Information | ||
|---|---|---|
|
Servings per 1kg package: 33 Servings size: 30g |
||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 481 | 1603 |
| 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 |
| Typical Whey Protein Isolate Amino Acid Profile | ||
|---|---|---|
| Typical Amino Acid Profile | Avg Qty Per Serve | Avg Qty 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 dietetic 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.
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.
Whey Protein Isolate FAQs
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.
Is Whey Protein Isolate lactose free?
Whey Protein Isolate contains small amounts of lactose which usually means it is suitable for lactose sensitive individuals. People with complete lactose malabsorption may still have trouble tolerating the lactose in whey protein isolate.
Comparatively though WPI contains very little lactose, at approximately 0.3 grams per serve it has forty times less lactose than a glass of milk.
Does Whey Protein Isolate contain gluten?
Gluten is not naturally occurring in any of the ingredients in our Whey Protein Isolate, though we do process other gluten containing ingredients in our facility.
How many serves of WPI should I have each day?
The answer here will depend on your weight, energy levels and goals.
Most athletes and active people aim to consume 2 grams of protein per kilogram of bodyweight per day. For an 80kg person, this equals 160 grams of protein. Two WPI shakes a day would contribute 52g of protein to this total, leaving approximately 108 grams of protein to be consumed through general food sources.
Protein from protein shakes should be one of multiple protein sources you consume, not the only one.
What is the standard dose of WPI powder?
30 grams is the generally accepted standard dose of WPI protein powder, as this yields between 25 and 28 grams of pure protein.
How long after a workout should I have WPI?
For optimal recovery and muscle growth, it’s generally recommended to take Whey Protein Isolate within 20-60 minutes after exercise.
Why is WPI better than eating tuna, meat or drinking milk?
Like other powdered protein sources, WPI is great value for money and can be very convenient.
With a long shelf life (usually up two years), WPI is extremely stable and can be stored, carried and consumed easily unlike a tin of tuna or steak.
WPI contains only trace amounts of fats and carbohydrates, as opposed to most high protein foods which contain these in higher amounts.
How soon should I drink WPI after mixing it with water?
While WPI is very stable in powdered form this changes when mixed with water. Once mixed with water, WPI should be consumed within an hour. It can last more than 24 hours once blended with water if refrigerated.
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!
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Whey Protein Isolate Reviews
Great taste
Love the banana flavour. Super fast delivery!
Vanilla WPI
Absolutely amazing! 2nd time purchasing! Super yummy and mixes really well. Trying chocolate next
tastes amazing
The choc honeycomb flavour is by far one of the best tasting protein powders I have tried! Love it!!
Quality protein
Great product at great value, has macros better than most name brand products. Low carb & great for keto
The taste is amazing
I am new to this type of product so take my review with a grain of salt.
I really love this powder! I got it in the choc honeycomb flavor and I love the taste. I workout 3 times a week and have it straight after a session. It really hits the spot. I was surprised how filling it feels with just one scoop of powder.
Can’t recommend it enough
Delicious
The Salted Caramel flavored WPI tastes amazing. Quality product.
Sweet tooth’s delight
Choc honeycomb is your best flavour – you got this one spot on ! It’s the most intense and true to it’s name – I bloody love it
Great product
Awesome product mixes well and the new flavor is great
'Tis Fantastic
Easily the best protein you can get for the price it is. Decent flavour, good shipping times and the staff are excellent if you have any issues
Best product
Great taste, hardly any lactose in it so doesn’t leave you feeling bloated like the WPC and keeps you full for a long time.
Best protein ever
I love this protein! It mixes so smooth, never clumpy. It doesn’t have that chalky, distinctly “protein” taste that most protein powders do. I usually just mix it with milk and it tastes like flavoured milk. I love vanilla and salted caramel, but not so keen on the chocolate
Taste great
Order was delivered quick, protein taste awesome I have vanilla and choc honeycomb
