It can be speculated that the lower initial LW in the study of Ma et al. (2013) (5.59 g±0.02 s.d.) compared to the initial
LW used in this study (25.8 g±3.0 s.d.)might be the reason for the difference. However, similar RG was reached in both studies. Furthermore, no evident relationship between LW and recommended Met+Cys supply exists (Table 7)