The experiments were conducted to study the effect of tea polyphenols on growth performance, lipometabolism, deposition of lipid and immunity function of broiler chickens. 420 1-day-old Avian broiler chickens, with random body weight, raised respectively according to sex, were randomly allotted into five treatments with 3 replicates in each treatment, 14 male broiler chickens and 14 female ones each replicate, for a two-phase trial(0-3w,4-6w). The experiment involved 5 dietary levels of tea polyphenols(cont...