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Whey Isolate

You work out, you work hard and play hard. Take a bow. That means you’re living life to the full. But engines don’t run on empty. You need a tank full of good protein to fuel your moves. Made strictly from the highest quality ingredients these beautiful blends will give you the mojo to Go Good!

Go Good whey protein isolate comes from New Zealand grass-fed dairy cows. After single pasteurisation of fresh milk, our whey undergoes an extra low-temperature filtration process to preserve the beneficial protein nutrients and remove almost all sugar and fat.

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Whey Protein Isolate

Grass-fed whey protein from New Zealand

Go Good whey protein isolate (WPI) comes from grass fed dairy cows that graze on the lush green pastures in the South Island of New Zealand. Manufactured using CFM (Cross Flow Microfiltration) at a low temperature which better preserves and protects the nutritional value and results in an extremely pure protein source. Rich in branch chain amino acids (BCAA’s) and virtually fat, carbohydrate and lactose free. Blended with our organic wholefoods Go Good whey protein isolate is among the most nutritionally complete protein powders you will find worldwide.

What are the benefits of whey protein Isolate?

Sourced from the freshly skimmed milk of grass-fed New Zealand dairy cows, Whey Protein Isolate (WPI) is a more refined form of whey protein powder. Micro-filtration at low temperature removes virtually all carbohydrates, fats and lactose. The result is the highest protein purity of any whey protein available worldwide.

  • Enhances muscle function and recovery
  • Fast absorbing and easy to digest
  • Improves your immunity
  • Ultra low in fat, sugar-free
  • Suitable for vegetarian and lactose intolerant
  • Learn more about WPI
  • Ultra high protein to build lean muscle and boost performance.
  • Real organic flavours bursting with nutrients your body loves.
  • Naturally satiating, decreases your appetite and keeps you fuller for longer.
  • Fast absorbing and quickly digested, excellent for exercise recovery.
  • Ultra low carbs and sugar, weight management made easy.
  • Low lactose and tummy friendly reducing any bloating.

Which protein should you choose?

Feature Whey Concentrate Whey Isolate Plant Protein (Pea)
Primary Goal Everyday Wellness Lean Muscle & Recovery Vegan / Dairy-Free
Protein per Serve ~24g ~27g ~23g
Source 100% NZ Grass-Fed 100% NZ Grass-Fed European Golden Pea
Lactose Level Low (Micro-filtered) 99% Lactose-Free 100% Dairy-Free
Heavy Metal Tested Yes Yes Yes
Plastic Free Packaging Yes Yes Yes
Pregnancy & Breastfeeding Yes* Yes* Yes*
Gut Friendly / Low FODMAP Yes Yes Yes
Gluten & Soy Free Yes Yes Yes
Natural Sweetener Thaumatin (Fruit) Thaumatin (Fruit) Thaumatin (Fruit)

*Our ingredients are clean, GMO-free, and natural. However, because every pregnancy is unique, we recommend consulting your healthcare professional or LMC before starting any new supplement.

Frequently asked questions

Does Whey Protein Isolate interact with other nutrients or supplements?

Whey protein isolate is generally safe to take alongside most vitamins, minerals and common supplements. As a high quality complete protein, it works synergistically with nutrients such as creatine, carbohydrates and electrolytes to support muscle recovery and performance. For example, pairing protein with carbohydrates after training can support glycogen replenishment, while combining it with creatine may enhance strength adaptations when used consistently.

Protein can slightly slow the absorption of some nutrients when consumed together, but in practical terms this is rarely an issue in a balanced diet. In fact, taking whey isolate with meals can support satiety and help stabilise energy levels. The main consideration is overall intake, ensuring you are not exceeding your individual protein requirements or layering multiple protein based supplements unnecessarily.

At Go Good, our Whey Protein Isolate is made from premium New Zealand grass fed whey and flavoured with real organic fruits and superfoods, without artificial fillers that could complicate stacking with other supplements. With third party batch testing for quality assurance, it is designed to integrate cleanly into a broader nutrition plan, whether that includes creatine, collagen or daily micronutrient support.

Who should consider taking Whey Protein Isolate over other proteins?

Whey protein isolate is well suited to individuals who want a high protein intake with minimal carbohydrates and fats. Because it undergoes additional filtration, it delivers a higher percentage of protein per serve while keeping lactose very low. This makes it a strong option for those who are tracking macros closely, aiming to build lean muscle, or looking to increase protein intake without significantly increasing overall calories.

It can also be a good choice for people who are mildly lactose sensitive but still tolerate dairy. The reduced lactose content often makes isolate easier to digest compared with less refined protein sources. Athletes, busy professionals, and anyone prioritising recovery and muscle maintenance may appreciate the lighter texture and clean macro profile that isolate provides.

At Go Good, our Whey Protein Isolate is made from premium New Zealand grass fed whey and flavoured with real organic fruits and superfoods rather than artificial additives. Combined with third party batch testing for quality assurance, it is designed for those who understand the difference quality sourcing and clean ingredients make when choosing a protein to support daily performance and long term health.

Should I mix Whey Protein Isolate with water or milk for the best results?

Whether you mix whey protein isolate with water or milk depends on your goals and personal preference. Mixing with water keeps calories, carbs and fats lower, allowing the protein to digest quickly and efficiently. This can be ideal post workout when the focus is fast absorption and meeting your daily protein target without adding extra macros.

Mixing with milk creates a creamier texture and adds additional protein, carbohydrates and fats, which can make the shake more filling. This option may suit those using protein as part of a meal or looking to increase overall calorie intake to support muscle gain. The added nutrients from milk can also contribute to satiety and a slower digestion rate.

With Go Good Whey Protein Isolate, both options work well because the base is clean and not overly sweet. Made from premium New Zealand grass fed whey and flavoured with real organic fruits and superfoods, it blends smoothly in water for a lighter shake or in milk for a richer texture, without relying on artificial flavour systems or fillers.

How many calories and carbs are in a serving of Whey Isolate?

Using Go Good Whey Protein Isolate Unflavoured as a reference, a typical 25 gram serve contains approximately 100 calories and around 1 gram of carbohydrates. Because it is unflavoured and free from added sugars or flavouring systems, the carbohydrate content primarily comes from trace naturally occurring lactose that remains after filtration.

The majority of those calories come directly from protein, with each serve delivering roughly 22 to 23 grams of high quality protein sourced from premium New Zealand grass fed whey. Fat content is also very low due to the additional filtration process used to create isolate, keeping the overall macro profile lean and efficient.

At Go Good, the focus is on keeping the ingredient list clean and simple. Our Unflavoured Whey Protein Isolate contains no artificial sweeteners, fillers or flavour enhancers and is third party batch tested for quality assurance. The result is a light, versatile protein that can be added to smoothies, oats or baking without altering taste or adding unnecessary carbohydrates.

Is Whey Protein Isolate lactose-free and easy to digest?

Whey protein isolate is not technically lactose free, but it is very low in lactose. Because it undergoes additional filtration compared to concentrate, most of the lactose and fat are removed during processing. In many high quality isolates, lactose levels are often less than 1 gram per serve, which makes it suitable for many people who are mildly lactose sensitive.

This lower lactose content is one of the reasons whey isolate is generally considered easier to digest. The higher protein percentage and reduced dairy sugars can mean less bloating or digestive discomfort for those who struggle with standard dairy products. That said, individual tolerance varies, and those with severe lactose intolerance should always monitor their response or seek professional advice.

At Go Good, our Whey Protein Isolate is made from premium New Zealand grass fed whey and carefully filtered to deliver a clean, light protein that blends easily and sits well. We flavour it with real organic fruits and superfoods rather than artificial additives, and every batch is third party tested for quality assurance, so you can feel confident in both digestibility and ingredient integrity.

What is the difference between Whey Isolate and Concentrate?

The main difference between whey protein isolate and whey protein concentrate comes down to processing and protein percentage. Whey concentrate is typically around 70 to 80 percent protein, with small amounts of naturally occurring lactose and fats remaining. Whey isolate undergoes additional filtration, resulting in a higher protein percentage, often 85 to 95 percent, and lower lactose and fat content.

Both forms are complete proteins that contain all essential amino acids, including leucine which plays a key role in muscle repair and recovery. The amino acid profile is very similar per gram of protein, so both effectively support strength, recovery and daily protein intake. The choice usually depends on individual tolerance to lactose, desired macro profile and personal preference around texture and taste.

The bigger consideration is not simply isolate versus concentrate, but where the whey is sourced from and what is blended with it after processing. The quality of the milk, whether it is grass fed, how it is filtered, and whether artificial sweeteners, fillers or synthetic flavour systems are added can significantly impact both how the protein tastes and how it sits in your body.

At Go Good, we use premium New Zealand grass fed whey and flavour our proteins with real organic fruits and superfoods such as organic banana, strawberry, vanilla and cacao. Combined with third party batch testing for quality assurance, this ensures every scoop reflects transparency, integrity and ingredients that actively support your lifestyle rather than just boosting the protein number on the label.