How good is soyabean and how good is soya protein?
Soyabean is a leguminous plant. The Chinese have been cultivating and consuming soyabeans for over 4000 years. Soya protein is the only plant protein that is equivalent to animal protein. Soya protein contains all the nine essential amino acids. The U.S. Department of Agriculture evaluates protein quality using the Protein Digestibility Corrected Amino Acids Score (PDCAAS). PDCAAS measures the amino acid pattern of proteins and factors in digestibility. Soya protein has a PDCAAS score of 1.0, equivalent to animal protein such as casein (milk protein). Animal proteins are considered to be better in quality compared to plant proteins.
