A study conducted at the College of Agriculture, Kirkuk University, was published in the Passer Journal of Basic and Applied Sciences, indexed in Scopus, Q4.The researchers were Professor Dr. Ammar Qahtan Sha'noun, Professor Dr. Qani' Hussein Amin, and researcher Saroud Samal Shawkat.The researchers explained that the study aimed to determine the relationship between the level of epigallocatechin gallate (ECG) nano-incorporation in the diet and the productive performance of broiler chicks, and to evaluate the resulting effects on their biochemical indicators and the development of their digestive organs.