A popular dietary supplement is green tea. Epigallocatechin-3-gallate (EGCG), a polyphenolic substance, is present in it. The green tea plant thrives best in warm climates and higher elevations. Plants need three to five years to reach full growth before they can be harvested commercially. Since green tea is less processed or has no oxidation, it has more antioxidant properties than other types of tea nowadays and is frequently used to lose weight. Green tea has a high level of antioxidants because to a polyphenol called EGCG. It is anti-inflammatory, anti-carcinogenic and has antibacterial properties among many other health advantages. Green tea has many health advantages, but excessive consumption can also have negative effects. Green tea and its concentrated extract have a number of negative side effects when consumed in excess, including agitation, CNS stimulation, headaches, hepatotoxicity and others. Today's society is less aware of the benefits of drinking green tea, thus people often drink it without first consulting a doctor.