**1. Introduction**

The *Camellia Sinensis* plant, from which tea is produced, is cultivated in more than 30 countries throughout the globe [1, 2]. White tea, green tea, black tea, and oolong tea are the four varieties of tea produced [3, 4]. This type of tea is made from the same plant, *C. Sinensis*, as the previous varieties. White tea undergoes the least processing, followed by green tea, which are both unfermented, oolong tea, which is partially fermented, and black tea, which is fermented, all of which undergo an oxidation process before being consumed [5]. Compare to other teas, green tea is among the least oxidized. Green tea is available in many forms, such as tea bags. Loose-leaf, instant power, and supplement sold in capsule form. It is made from unfermented leaves with minimal processing and contains catechin (80–90%) and flavanols (<10%) [6]. It provides a high concentration of antioxidants called polyphenols. Currently, green tea is mostly consumed in China, Japan, and Korea. It is responsible for improving blood circulation, lowering cholesterol

levels, preventing a variety of cardiovascular problems, and protecting against the harmful effects of a high-fat diet [7, 8]. Worldwide, black tea accounts for around 78% of total consumption, and green tea accounts for approximately 20% [9, 10]. Green tea can bring relaxation and a calm feeling to its lovers, unlike soft drinks or liquors.
