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ISO ZERO is made up of over 83% whey protein (WPI, WPC), one of the purest sources of protein. This 83% protein comes only from whey: no synthetic amino acids, collagen or gluten are added (100% from whey). Proof of its quality is also its chemical index of over 100. The Eric Favre® laboratory selected it for its rapid assimilation, which allows for muscle development, as proteins help to increase muscle mass. Due to its extraction process, the protein is only slightly denatured and ensures very good digestion.