Green tea plays a protective role in human body against the fatal diseases, as it is found as rich in anti-oxidants, mainly epigallocatechin gallate (EGCG). This was said by Prof Dr Muhammad Iqbal Chaudhry, acting director international centre for chemical and biological sciences (ICCBS), Karachi University (KU) here on Thursday. While delivering a lecture at the ICCBS, he said the extensive consumption of the tea helps reducing fat cells (obesity) in human body, which is most common health problem of the country especially in the urban areas.