IDF’s Nutrition Week 1995 produced a demand for further consideration of the Protein Digestibility Corrected Amino Acid Score published in FAO Food and Nutrition Studies No. 51 Evaluation of the nutritional quality of proteins (FAO, Rome 1993). The scientific aspects are under review by Prof. Chr. Barth (Germany) and Dr G.-J. Schaafsma (Netherlands). IDF Secretariat has been asked to determine with FAO how to introduce a further round of thinking into the debate.