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Whey Protein Isolate vs
Whey Protein Concentrate

So what's really the difference between WPI and WPC?

In the simplest possible explanation the only difference between the two is the level of lactose and fats. This means that WPC is not suitable for people that are lactose intolerant. Before we go further into the difference it's worth noting the composition of milk protein.

grass-fed dairy cows

What is milk protein?

Milk protein is comprised of casein and whey. Casein is unsuitable for many due to digestion issues, whereas whey protein, with heavily reduced fats and lactose, is generally more tolerated. Whey protein is the richest natural source of the essential building blocks for muscles, branched-chain amino acids (BCAAs). It is a complete protein in that it contains all 20 amino acids, unlike many other proteins such as soy.

caseien manufacturing

What is casein protein?

Casein protein is a poorly soluble, hydrophobic milk protein. It contains high numbers of proline amino acids and is found in milk as a suspension of particles called casein micelles. It is the primary component in most cheeses. We choose not to retail casein as we find it an inferior protein source compared to whey.

So what is WPI & WPC?

Bare Blends WPI tubes

New Zealand Whey Protein Isolate (WPI)

  • WPI is a high-protein, filtered milk product containing very little lactose, fats, and carbohydrates
  • It is manufactured from cheese whey
  • It is a complete protein containing all 20 amino acids
  • It has a higher concentration of amino acids and less calories than WPC
  • It is an essential part for any elite athletes nutritional regime
  • Bare Blends WPI comes from New Zealand

Australian Whey Protein Concentrate (WPC)

  • WPC is a high-protein, filtered milk product containing some lactose, fats, and carbohydrates
  • Has a higher lactose content than WPI
  • Not suitable for lactose intolerant people
  • It is manufactured from cheese whey
  • It is a complete protein containing all 20 amino acids
  • Much of the natural amino acid profile and immune boosting factions retained in WPC are typically lost in other whey proteins
  • Bare Blends WPC comes from Australia

WPI vs WPC manufacturing difference

caseien manufacturing

Both products are manufactured from freese cheese whey via a chemical and heat free micro filtration process. There is one key difference; WPI has one extra level of filtration that removes most of the carbohydrates (lactose) and fats.

New Zealand Whey Protein Isolate

Our WPI is made in New Zealand from the milk of grass-fed dairy cows.

Australian Whey Protein Concentrate

Our WPC is made in Australia from the milk of grass-fed dairy cows.

Lactose content


A key deciding factor in your choice

Whey Protein Isolate goes through one more filtration compared to Whey Protein Concentrate. This extra step removes almost all of the remaining lactose and fats. Because of this extra filtration most people can tolerant the tiny amount of lactose in WPI. We strongly recommend that if you are lactose intolerant you choose WPI over WPC.


Which one is for me?

casien manufacturing

WPI - 90% protein

  • Better for post-exercise
  • Ideal for caloric restriction diets for weight management
  • Suitable for lactose intolerant people
  • Higher protein conent per g

WPC - 80.5% protein

  • High protein snack when you’re feeling hungry
  • Keeps you feeling full for longer due to more carbs and fats
  • Slower digesting
  • More economical compared to WPI

How can they help me?

drew chin-up bar


  • Quickly and naturally provides your muscles with BCAAs for enhanced recovery time
  • Can promote lean muscle mass
  • Increased antioxidant synthesis Helps with weight loss
  • Can help you to lose weight in conjunction with a proper diet and fitness routine


  • It will help to boost your immune system thanks to the immunoglobulins
  • Increased antioxidant synthesis
  • Will promote lean muscle mass
  • Can help you to lose weight in conjunction with a proper diet and fitness routine


The taste

smoothie bowl

Both products taste very similar. WPI has a cleaner taste than WPC, this is purely because it has less fats and carbohydrates. After the proteins are blended with our organic flavours you don't taste much of the whey flavour.

Bare Blends flavours

We only blend our proteins with the best organic flavours. Using real cacao, real vanilla bean pods, and Japanese matcha we believe we have formulated the best tasting proteins on the market.

Buy them now

WPI vs WPC Quick Comparison Chart

The Benefits WPC WPI
High Levels of Essential Amino Acids
Rapidly Absorbed Protein
Suitable for lactose intolerance
Mixes Well
Assist in Weight Loss & Management
Build Muscle
Faster Recovery Time
More Economical

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WPI vs WPC frequently asked questions

Is whey protein isolate suitable for lactose intolerant people?

Bare Blends whey protein isolate blends contains almost no lactose, and are suitable for lactose intolerant people. The NZ whey protein concentrate contains significantly more lactose, and is not as suitable for those with intolerances.

What is the best storage method?

What is the shelf life?

What are the serving sizes?

What is the amino acid profile of WPI?

Is whey protein suitable for pregnant and breastfeeding women?

Is whey protein suitable for children?

Isn’t whey protein just for athletes and bodybuilders?

Can I use WPI as meal replacement?

Is our whey protein powder organic?

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