This study aims to examine the ability of L tyrosine  500mg/ kg diet  (TYR), vitamin E 50mg/kg(E50) or Butylated hydroxytoluene 125mg/kg(BHT) without or with anhydrous sodium sulphate 0.3%(SS) in improving broiler performance . A total number of 240  male Arbor Acres broiler chicksone day old were randomly distributed into eight  group received control diet or control diet supplemented with SS, TYR, TYR+SS, E50, E50+SS, BHT and BHT+SS. At 35 day, The body weights were 1850, 1953  ,2241 ,2333 ,2086  ,2080 ,1742, and 1846, respectively. The birds fed TYR+SS recorded the best feed conversion. The birds fed control diet recorded the highest value while birds fed TYR recorded the lowest values. All feed additives used in this study increased plasma phosphorus with range from18.70 to38.51% compared to control diet. That elevation in plasma phosphorus is not normal and close to Ca concentration. It is clear that tyrosine was the best additives under the condition of this study. Further studies are needed with different levels of TYR and SS under suboptimal levels of metabolizable energy and crude protein.