The problem with Whey Protein Powders available on the market today is that they undergo 1 to 2 heat sterilisation/pasteurisation steps. These Whey Protein Powders are first heat sterilised/pasteurised at 161 degrees for 15 seconds as milk. Then the milk is fermented into cheese and the liquid Whey is separated from the cheese curd. This liquid Whey is then heated sterilised/pasteurised again at 161 degrees for 15 seconds. The least beneficial are Whey Protein isolates due to the extra high pressure processing steps. This subjects the Whey to further denature and the removal of essential immunoglobulins which are proteins that your immune system produces.
Whey Protein isolates and concentrates have 2 steps of heat sterilisation together with several processing methods, this result in different degrees of deformation also known as denaturing of the protein structures and amino acids, which makes them useless to your body and potentially harmful over time.
Denatured Whey Proteins in your digestive tract will lead to putrefaction (the process of decay or rotting in a body or other organic matter), which causes constipation, gas and bloating which is a familiar experience for many after taking regular whey protein.
Whey Protein Powders claiming to be non-denatured are simply not! All manufacturers have heat sterilised their products normally twice at 161 degrees. It only takes 118 degrees for amino acids beginning to deform, which destroys beneficial bacteria, enzymes, immunoglobulins, branched chain amino acids, etc.