NATURE’S MOST COMPLETE PROTEIN SOURCE. Numerous methods exist to determine protein quality. These methods have been identified as protein efficiency ratio, biological value, net protein utilization, and protein digestibility corrected amino acid score (PDCAAS). Egg protein is one of the highest rated protein sources in all four (4) rating scales. The quality of a protein is vital when considering the nutritional benefits that it can provide. Egg protein is the most complete protein when compared to all other animal and plant-based sources. Whey Proven Egg 100% Egg White Protein? Nature's most complete protein source 21% more efficient than whey protein in building lean muscle One scoop is equal to 7 egg whites 0 hormone, antibiotics, dairy & lactose 0 artificial flavors, colors & sweeteners.