The statement that "Plant proteins rank the highest on protein quality measures" is true. Plant proteins supply the body with dietary fibers and can meet the needs of almost all of the human body. The advantages are you get more fiber, you get more mono and poly unsaturated fatty acids and lowers your blood cholesterol.
Animal proteins such as meat, poultry, eggs, fish, milk and cheese rank the highest on protein quality measures, while plant proteins rank lower. ISSA pg 557
