This study was done in MCassab science institution. Among the exogenous enzymes, phytase is highlighted, which is studied and used in the feed formulation for monogastric in order to make complexed nutrients available in the phytate molecule present in the ingredients of vegetable origin (Dari, 2004). The purpose of this work was to assess phytase levels (Microtech 5000 Phytase), with a nutritional value, in the feed of broilers in the period from 1 to 42 days old.