 The current dietary reference intake DRI requirement for healthy adult males is based on the reanalysis of the nitrogen balance date from Young and Scrimshaw. This data was reanalyzed statistically by Rand et al. and he concluded that the protein requirement of healthy adults was 0.65 and 0.83 mean and RDA gkgday of good quality protein. Using IAAO, our group estimated the protein requirement of young men mean age 27 years to be 0.93 and 1.2 gkgday mean and RDA. 