This research was conducted to find out the effect and optimal percentage of adding Zn and Cuproteinat supplement product of fermentation by Saccharomyces cerevisiae in the ration on internalquality of the broiler. The experiment used 125 broiler day old chicken with a Completely RandomizedDesign. The ration treatments were R0 (control). R1 (99% R0 + 1% supplement Zn and Cu proteinat). https://jalyttlers.shop/product-category/measuring-spoons/