Green tea (Camellia sinensis) extract has been shown to have potent antioxidant and antimicrobial properties. Its antibacterial effects have even been studied for resistant bacteria such as methicillin resistant Staphylococcus aureus and resistant Pseudomonas aeruginosa (Radji 2013 et al 2013).
Radji M, Agustama RA, Elya B, Tjampakasari CR. Antimicrobial activity of green tea extract against isolates of methicillin-resistant Staphylococcus aureus and multi-drug resistant Pseudomonas aeruginosa. Asian Pacific Journal of Tropical Biomedicine. 2013;3(8):663-667. doi:10.1016/S2221-1691(13)60133-1.