Differences in digestibility of indispensable AA between SBM grown in different areas have to be taken in consideration and it should be expected that those are presented in reference tables in the future. Variability in SBM composition was demonstrated by de Coca-Sinova et al. (2008) who evaluated SBM from six different origins and found considerable variation in chemical composition and protein quality, which caused differences in AA digestibility with 21-d-old broilers. These authors also reported that the SBM with higher levels of CP and lower levels of trypsin inhibitor activity showed higher AA digestibility. Factors such as genotype, processing and environmental conditions during growing and harvesting of beans have been related to affect the chemical composition of SBM