Original sentence: Biological Value (BV), as demonstrated by research scientists including K.Mitchell has been considered another method of choice for estimating the nutritive value of proteins due to its  relevance and accuracy.The analytical method that is universally recognized by the FAO/WHO as well as the FDA and USDA when judging the quality of protein in the human is not PER but the Protein Digestibility Corrected Amino Acid Score (PDCAAS), as it was deemed superior when accurately measuring the correct relative nutritional value of animal and vegetable sources of protein in the diet
Edited sentence: However, Biological Value (BV), as demonstrated by research scientists including K.Mitchell, has long been considered the method of choice for estimating the nutritive value of proteins due to its  relevance and accuracy.The analytical method that is universally recognized by the FAO/WHO as well as the FDA and USDA when judging the quality of protein in the human is not Biological Value but the Protein Digestibility Corrected Amino Acid Score (PDCAAS), as it was deemed superior when accurately measuring the correct relative nutritional value of animal and vegetable sources of protein in the diet