A protein's Chemical Score is based on the amino acid profile. Egg protein is considered a nearly perfect source of protein because its amino acid profile most closely matches that needed by the human body. Therefore, egg protein has been given a rating of 100 in the chemical score. Below is a comparison of the chemical score of some other proteins: Healthy 'n fit 100% egg protein - 100% (highest) Milk & Egg Protein (with 10% egg) - 66% Soy Protein - 47% Fish Protein - 70% Meat Protein - 69%100% Pure Extracted Egg Albumen (with a Protein Efficiency Ratio (P.E.R.) of 3.9 or greater).