In recent years, the uses of herbal products have increased significantly. Unfortunately, with the use of these used herbal products, an increase in number of reported adverse effects were seen. Green tea is made from steaming of the Camellia sinensis plant. The catechins in green tea consist of epicatechin (EC), epicatechin-3-gallate (ECG), epigallocatechin (GCG), and epigallocatechin-3-gallate (EGCG). They are responsible for green tea advantages like anti-inflammatory, antioxidant, anticarcinogenic, and antimicrobial activity. Despite these benefits, recently there have been several research that demonstrate several disadvantages and adverse effects following the consumption of a high dose of green tea extract which can lead to undesirable side effects like: Gastrointestinal disturbance and liver hepatotoxicity, nervous system stimulation, cardiovascular problems, disrupts renal function, interferences with some medications, impair thyroid function, iron deficiency anemia, hypokalemia, birth defects, and infertility. It is better to limit the green tea consumption to not more than two to three cups per day. Daily taking of too much green tea extract may have many side effects. How to Cite this Article Pubmed Style Khaleel AK, Shaari RB, Nawi MAA, Al-yassiri AMH. Effects of Green Tea on Public Health the Untold whole Medical SRP. 2020; 11(9): 883-887. doi:10.31838/srp.2020.9.128 Web Style Khaleel AK, Shaari RB, Nawi MAA, Al-yassiri AMH. Effects of Green Tea on Public Health the Untold whole Medical http://www.sysrevpharm.org/?mno=22301 [Access: March 31, 2021]. doi:10.31838/srp.2020.9.128 AMA (American Medical Association) Style Khaleel AK, Shaari RB, Nawi MAA, Al-yassiri AMH. Effects of Green Tea on Public Health the Untold whole Medical SRP. 2020; 11(9): 883-887. doi:10.31838/srp.2020.9.128 Vancouver/ICMJE Style Khaleel AK, Shaari RB, Nawi MAA, Al-yassiri AMH. Effects of Green Tea on Public Health the Untold whole Medical SRP. (2020), [cited March 31, 2021]; 11(9): 883-887. doi:10.31838/srp.2020.9.128 Harvard Style Khaleel, A. K., Shaari, . R. B., Nawi, . M. A. A. & Al-yassiri, . A. M. H. (2020) Effects of Green Tea on Public Health the Untold whole Medical SRP, 11 (9), 883-887. doi:10.31838/srp.2020.9.128 Turabian Style Khaleel, Ameera Kamal, Ramizu Bin Shaari, Mohamad Arif Awang Nawi, and Ali Mihsen Hussein Al-yassiri. 2020. Effects of Green Tea on Public Health the Untold whole Medical Systematic Reviews in Pharmacy, 11 (9), 883-887. doi:10.31838/srp.2020.9.128 Chicago Style Khaleel, Ameera Kamal, Ramizu Bin Shaari, Mohamad Arif Awang Nawi, and Ali Mihsen Hussein Al-yassiri. Adverse Effects of Green Tea on Public Health the Untold whole Medical Story. Systematic Reviews in Pharmacy 11 (2020), 883-887. doi:10.31838/srp.2020.9.128 MLA (The Modern Language Association) Style Khaleel, Ameera Kamal, Ramizu Bin Shaari, Mohamad Arif Awang Nawi, and Ali Mihsen Hussein Al-yassiri. Adverse Effects of Green Tea on Public Health the Untold whole Medical Story. Systematic Reviews in Pharmacy 11.9 (2020), 883-887. Print. doi:10.31838/srp.2020.9.128 APA (American Psychological Association) Style Khaleel, A. K., Shaari, . R. B., Nawi, . M. A. A. & Al-yassiri, . A. M. H. (2020) Effects of Green Tea on Public Health the Untold whole Medical Systematic Reviews in Pharmacy, 11 (9), 883-887. doi:10.31838/srp.2020.9.128