In the comprehensive new paper, The Public Health Case for Modernizing the Definition of Protein Quality published in Advances in Nutrition, True Health Initiative, with leading experts, redefines protein quality based on current scientific evidence. The researchers then adapted this new definition into a metric that can be applied to national food regulatory and labeling systems. The paper outlines why our current definition of protein quality is obsolete, inaccurate, and harmful to both human and planetary health.