The current research was carried out to investigate the health and nutritional efficiency of the using bakery yeast Saccharomyces cerevisiae as a dietary additive at rates of 0.5, 1 and 1.5% and observe the extent of its affect on the growth of common carp Cyprinus carpio fingerlings by following the parameters of growth, feeding efficiency and feed conversion rate. The results showed that T3 in total weight gain ratios of 232.12g/fish was significantly different from other treatments T0, T1 and T2 with no significant difference between them. The daily weight gain of T3 was 3.22g/fish with significant difference from the rest of the treatments which were 2.15, 2.39 and 2.26 for T0, T1 and T2, respectively, T3 by 175.75% with no significant difference between T0, T1 and T2. Growth rate results showed two higher values; 5.27% in T3 and lower in T0 with no significant difference (0.05<P) between T0, T1 and T2, respectively. The best result for feed conversion rate was shown by T3 at 1.79 with a significant difference with T0. The higher value of feed conversion efficiency was 55.97% in T3, with no significant difference in all treatments in the amount of protein intake.