What is Whey Protein?

Justin Chapman by Justin Chapman 11 June 2014

Whey protein is a complete protein containing all 9 essential amino acids. Protein is widely considered one of the most important supplements in sports nutrition

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What is Whey Protein?

Whey protein powder is one of the most common sporting supplement available, and for good reason. It is heavily researched with strong evidence to suggest it can help you build lean muscle mass, improve strength and shed fat1,2.

So what is whey and where does it come from? Whey is a component of dairy milk. Milk is made of two proteins, 80% being casein and 20% being whey.  Whey is separated from casein (the curds in cottage cheese) during the cheese making process.  The whey component is then filtered to remove all non-whey ingredients, purified and later dried to create a powder.

Whey protein is a complete protein which means it contains all 9 essential amino acids including the three branched chain amino acids (BCAAs), leucine, isoleucine and valine, renowned for their involvement in muscle protein synthesis and protection from muscle breakdown for energy, known as catabolism. 

Whey protein is widely considered one of the most important supplements in sports nutrition. Whether you're an elite athlete or everyday fitness enthusiast, a high-quality protein powder should form the cornerstone of your supplementation.

True Protein offers whey protein powder in two different forms, Whey Protein Concentrate (WPC80) and Whey Protein Isolate (WPI90).

Whey Protein Concentrate

WPC contains low levels of fat and low levels of carbohydrate in the form of lactose. 


True WPC80 is rich in nutrients and possesses an exceptional amino acid profile. True WPC80 has an 80% protein content, which equates to a fantastic 23.9g of protein for each 30g serve. True WPC80 also contains carbohydrates, vitamins and minerals, making it an ideal "all rounder" protein to assist you in achieving your fitness goals.


Whey Protein Isolate

WPI90 is further processed to remove all the fat and lactose yielding a 90% protein powder.


True WPI90 possesses an unrivalled protein content of 90% per serve. This equates to a whopping 27.2 grams of protein per 30g serve. Whey isolate protein powder is derived from further treatment to whey protein that enhances the protein concentration while simultaneously decreasing fat, lactose and carbohydrates. This makes supplementing with True WPI90 one of the purest methods of getting a healthy and high-quality protein boost.



  1. Morton RW, Murphy KT, McKellar SR, et al A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults Br J Sports Med 2018;52:376-384.

  2. Kim JE, O’Connor LE, Sands LP, Slebodnik MB, Campbell WW. Effects of dietary protein intake on body composition changes after weight loss in older adults: a systematic review and meta-analysis. Nutrition Reviews. 2016;74(3):210-224. doi:10.1093/nutrit/nuv065.

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