What is whey protein?

Whey protein is made from cow’s milk ‘whey’ and composed of many types of protein molecules. The main proteins in whey are alpha-lactoglobulin, beta-lactoglobulin, bovine serum albumin, glycomacropeptides and immunoglobulins.

Whey protein concentrate powders contain other beneficial nutrients such as calcium, potassium, phosphorous, vitamins A, C, B1, B2, B3, B5, B12, folic acid, biotin and some iron-binding proteins. Plus, the smaller protein molecules in whey offer further health-promoting actions.

The low fat, high protein content and high vitamin and mineral profile of whey protein concentrate make it a popular health supplement choice for athletes and body builders, for people looking to manage their weight and for general health and fitness benefits.

More generally, protein is an important nutrient for everyone and performs numerous functions in the body including:

  • Building and repairing muscles and bones
  • Repairing body cells
  • Providing a source of energy
  • Controlling many important metabolic processes in the body

How is whey protein produced?

Up until recently, whey protein was exclusively a by-product of the cheese-making process, where the addition of enzymes such as rennet, separates the cow’s milk to ‘curds’, the coagulated casein-rich solid portion used to make cheese, and ‘whey’, the remaining liquid portion.

Nowadays, due to the increasing popularity of whey protein powders and whey protein supplements for the health and fitness sector, whey proteins hold commercial value and are extracted from cow’s milk as the primary product.

Next, the liquid whey is filtered to remove fat, lactose, some minerals and water away from the desired whey proteins. These are then micro-filtered to concentrate the whey proteins into a smaller volume, hence why it’s called ‘whey protein concentrate’. At this stage, the liquid WPC is either spray dried into a WPC powder for packaging and sold to consumers, or it is ultra-filtered to produce whey protein isolate (WPI), that subsequently is also spray-dried into WPI powder.

What’s the difference between WPC and WPI, and how are they used?

Whey protein concentrate (WPC) contains 75-80% protein and much less lactose and fat then regular cow’s milk. Whereas whey protein isolate (WPI) has undergone a further stringent ultra-filtration process, from WPC to WPI, that removes a lot of the milk fats and lactose (sugar), and provides a high protein level greater than 90% of the total powder.

WPC contains lactose with many beneficial nutrients, milk fats with fat-soluble growth factors and bio-active fatty acids, and naturally WPC has more calories than WPI.

Due to WPI being a highly-refined powder, it is digested faster than WPC; 30 minutes for WPI verses 2-4 hours for WPC. This means that if fast absorption of protein is required, i.e. post-workout to maximise recovery and muscle growth, then WPI is ideal.

If you’re lactose-intolerant and/or on a strict calorie-controlled diet, then WPI may be a better choice for you. Both WPC and WPI mix well into liquid, contain high levels of amino acids, are rapidly absorbed and are a lean protein source.

Due to the costly filtration process to produce WPI, the WPI is more expensive than WPC. WPC is a cost-effective alternative to WPI when health and muscle growth benefits are considered.

Why is whey protein so popular?

In short, the components of whey protein are viewed as a functional food, which means it provides positive health effects to your body when consumed.

The low fat, high protein content and high vitamin and mineral profile of whey protein powder make it a popular health supplement choice for athletes and body builders, for people looking to manage their weight and for delivering general health and fitness benefits.

Do you have any good tips for buying whey protein products?

Yes. Be sure to know the main ingredient of the whey protein product you’re considering to buy. Try to restrain purchasing based on a fun brand name or colourful packaging that may distract you from checking out the list of ingredients. Find out what’s inside, including the full nutrient profile and other possible additives.

Furthermore, when you know what specific ingredient(s) you’re after—to support your body building, weight control or general health goals—you’ll feel more empowered to make the right product decision for your needs, rather than be swayed by clever marketing. Just like a generic medicine can have the same active compound as a name brand product, and both do the same job.

Lastly, use the convenience and command of online research to find out if the product of interest ticks all the boxes for being your best buy for your money. To build muscle, in our opinion, the best protein powder is a premium quality whey protein concentrate or whey protein isolate.


How much protein do I need each day?

This is not easy to answer because your individual protein needs vary depending on your age, weight, gender, activity level and overall health. Athletes and people with special medical conditions often require more protein than the recommended dietary allowance (RDA).

What are the health benefits of consuming whey protein powder?

Are there any health concerns related to consuming whey protein powders?

In general, whey protein is well tolerated by most people. However, we advocate safety first, so if you have a serious disease, medical condition, take prescription medication or are pregnant, please consult your health professional to make sure whey protein concentrate or whey protein isolate is acceptable for you to consume regularly.

Diabetics and kidney disease sufferers are strongly encouraged to talk to your doctor before consuming a whey protein supplement because increasing your protein intake could have a negative effect.

Furthermore, if you have protein or food allergies or intolerances, such as to lactose or to casein, please talk to a health professional before you decide to try whey protein supplements.


What is the nutritional composition of your whey protein products?

Protein Authority are proud of our premium products and provide full disclosure of our high-quality ingredients and nutrition profiles, direct from our whey protein suppliers.

To find out the nutrient composition of our whey protein products, please look for the product information and manufacturer’s data sheet certificate that we make available on our website for each specific product.

If you have trouble locating it, feel free to email us directly and we’ll send you the right information.

How are your whey protein powders packaged?

All our products are packed in government regulated laboratories under strict guidelines approved by Dairy Food Safety Victoria (DFSV) and the Australia Quarantine & Inspection Service (AQIS).

Our bulk 20kg powder products are packaged in heavy-duty foil-lined bags with a thick paper outer layer by our manufacturers, for ease of shipping and preserving product freshness.

Our 1kg bags are strong, re-sealable foil bags, a third of the cost of plastic containers with minimal design or marketing, allowing us to pass on the cost savings in these areas to our customers. Plus, we’re creating less plastic landfill.

The handy re-sealable pack means you don’t need to find another container for your whey protein powder. Better still, the red pack is super easy to spot so you won’t mislay your whey.

Why is lecithin added to whey protein powders?

A small amount of soy lecithin is added to our whey protein powders to help the product disperse easily into water or other liquids, and to mix in well.

Lecithin ensures the whey protein powder will dissolve rapidly and completely into your protein shake, which then makes the protein easier and faster for you to digest.

How should I store my whey protein powders?

Ideally, the best way to store your whey protein concentrate or whey protein isolate powder is in a cool, dry and dark place. There’s no need to transfer your powder to a container as our packaging is re-sealable, airtight and light can’t penetrate. If the room temperature exceeds 21oC, you may consider storing your product in the fridge to maintain its high quality and potency. The expiration date of all Protein Authority whey protein products is printed on the package.

What can I mix my whey protein powder with?

To give your body a great tasting protein shake, simply add 2 scoops of our flavoured protein powder to 200ml of milk or water, and shake vigorously. Our natural flavourings include chocolate, vanilla, banana and iced mocha.

Unflavoured protein powder can be added to your favourite fruit smoothie for a protein shake that’s rich in health-giving vitamins and minerals.

Are your whey protein products lactose free?

Because all whey proteins are derived from dairy they are not lactose free. However, if you’re looking for a low lactose whey protein product, the lactose in our whey protein isolate WPI (the USA product) is very low: 1.0 g per 100g (1%).

What is the cholesterol level of your whey protein products?

For your convenience, we provide all product nutrient information for each of our products within our product descriptions on our website. However, as a guide our whey protein isolate (WPI) from the USA is 10mg cholesterol per 100g, and our whey protein concentrate (WPC) from the USA is 230mg cholesterol per 100g.

Do your whey protein products contain gluten?

No, our whey protein powders have no added gluten and are considered gluten free.


How do you price your whey protein products so well?

We work on low margins compared to other whey protein suppliers, so we can pass on our savings to you. Because we buy in bulk from our world-leading whey protein manufacturers, then sell direct to you online, we can supply you with a high-quality whey protein product at a really great price.

There’s no middleman or added processing costs to inflate the cost of our products. We believe that well-priced high-quality products will result in more sales, rather than stinging less customers with higher margins. When you research online, you’ll find our prices are great for the quality of product you’ll receive.

How do you ensure your products are premium quality?

If you’re looking for the cheapest whey protein in Australia, you won’t find it at Protein Authority. In fact, we believe we have some of the best quality whey protein powders available in the country.

We provide all manufacturer data sheets and full disclosure of each product’s nutrition specifications within our product descriptions so you can assess our product quality in full for yourself.

All our protein supplements are packed according to strict quality control standards such as Dairy Food Safety Victoria (DFSV) and the Australia Quarantine & Inspection Service (AQIS) regulations.


How do you deliver your whey protein powder or other products?

All Protein Authority products ordered online are delivered to your door by professional couriers. You’ll receive an email with a tracking number from the courier company delivering your products, so you can check your order check your order status in real time.

If you live in a remote area that our couriers don’t service, then your delivery will be sent to the nearest post office/depot for your collection.

How long does delivery take?

We aim to deliver to major metropolitan areas (Melbourne, Sydney, Adelaide) within 1-2 business days.

For further details of our delivery times to all Australian destinations, please read our comprehensive Delivery Terms.

How much is delivery?

Protein Authority have a flat rate of $9.90 for all deliveries Australia wide.

Please refer to our Delivery Terms for our conditions to ship to PO boxes and interstate express shipping options.

Do you ship internationally?

No, we only ship within Australia.

My delivery is delayed—what can I do?

For rapid support, we recommend that you first contact the courier company delivering your order. They’ll be in the best position to determine why your delivery is delayed.

Then, if you can’t contact the courier company, please get in touch with us by email here. We will promptly call you to rectify the situation.

There’s a mistake with my delivery—what can I do?

If you’ve received damaged goods or the wrong order please contact us to remedy the situation. Please note we can’t process refunds if a product has been opened.

For all queries relating to your product, simply contact us and we’ll be happy to help.