“…Further, recent reports suggest that intraoral and oropharyngeal tumors occur and inexpensive for treating this neoplasm Kunnumakkara et al, 2019a). Numerous epidemiological, clinical, and experimental studies suggest that natural products possess enormous therapeutic potential for the prevention and treatment of different malignancies (Deorukhkar et al, 2007;Pandey et al, 2007;Shanmugam et al, 2011a;Yang et al, 2013;Dai et al, 2015a;Hsieh et al, 2015;Roy et al, 2016;Shanmugam et al, 2016;Yarla et al, 2016;Hasanpourghadi et al, 2017;Shanmugam et al, 2017;Banik et al, 2018;Jayasooriya et al, 2018;Khwairakpam et al, 2018;Kunnumakkara et al, 2019b). For instance, various plant polyphenols have been suggested to inhibit tumorigenesis and carcinogenesis of skin, liver, colon and lung cells (Lambert et al, 2005;Tan et al, 2010;Rajendran et al, 2011a;Rajendran et al, 2011b;Chan et al, 2012;Rajendran et al, 2012;Manu et al, 2013;Subramaniam et al, 2013;Sethi et al, 2014;Siveen et al, 2014a;Tang et al, 2014;Dai et al, 2015b;Lee et al, 2015;Amararathna et al, 2016;Dai et al, 2016;Ko et al, 2018).…”