Home > Muscle & Fitness > Q&As > Nutrition & supplementsBodybuilding circles are full of conflicting reports, especially when they come from people without a scientific background who are usually only concerned with selling you what they have on offer. Whey Protein Concentrate (WPC) has been recognised for some time now as having the highest biological value (BV) of any food protein. This means that, gram for gram of protein, it has the greatest potential to repair and build tissue. Whey protein powders, such as Perfect Protein, are about 80% protein with BV of 114 (as rated by the scientific community, NOT any manufacturer or marketer of supplements!) Whey Protein Isolates are processed from WPC, allowing individual protein fractions to be included or excluded from the product. The process usually reduces the fat content by about 1-2%. Up until recently the only way to process Isolates was by ion exchange, in which the WPC undergoes electrolysis and washing with acids and alkalis to separate the fractions. Unfortunately this process removes most of the calcium and changes the molecular structure of some of the proteins. These Isolates give a protein yield of about 90%, but have a BV of only 94. So consumers have had to make the choice between a powder with a high BV and 80% protein yield and one with a lower BV and a 90% yield. As a nutritionist I am always interested in quality, not just quantity, so I have always supported the use of WPC over Isolates. Food technologists have now developed a method of deriving Isolates from WPC, WITHOUT the use of electrical current, acids or alkalis. This advanced process of cold filtration allows the isolated fractions to remain intact, delivering their full nutritional potential. Aussie Bodies is one of the only companies to produce a WPI with Cold Filtered Isolate. |
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