The difference between undenatured and denatured protein has to do with the processing of the whey protein. Undenatured whey protein is not heat processed like denatured protein and as a result the amino-acid chemical mix and is of a much higher quality.
In summary, whey protein is obtained through the cheese making process, wherein it is heated to 70°C or 158°F before any filtering process even begins. To get undenatured you must find one that does not come from cheese production. The products I use come from grass feed New Zealand cows and is totally whole, natural and undenatured whey protein. It is more expensive, but definitely worth the investment.
The benefits from a whole, natural product will always be superior to modified and processed foods because the correct ratios of nutrients remain in tact, such as: Glycomacropeptides; Alpha-lactalbumin; Immunoglobins; Lactoferrin and Cysteine.
Cysteine is of particular importance, because it and comes together with two other amino acids (glycine and glutamic acid) to form Glutathione (GSH). Glutathione is a massive antioxidant and detoxifier in the body. It supports your immune system (bacteria, virus, and even cancer fighter), fights signs of aging, helps detox your liver and is excellent for muscle repair.
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