“…Phytase activity was first detected many decades ago in rice bran (Suzuki et al, 1997). Warden and Schaible (1962) are the earlier to verify that exogenous phytase improve phytate-P use and bone mineralization in poultry. However, before 1990s, the application of phytase has mainly been confined to poultry and swine to improve utilization of plant P. Initial commercial phytase, Natuphos was created from Aspergillus niger and was released in market in 1991 (Selle and Ravindran, 2007).…”