“…In in vitro studies, eugenol and eugenyl acetate suppressed IFN γ , IL-2, IL-10 levels ( Saraphanchotiwitthaya et al, 2019 ), and in in vivo studies, eugenol suppressed TNF α , IL-1 β , IL-6, and NF-kBp65 expression ( Ma et al, 2018 ). Among other chemical constituents, α -humelene is found commonly as a chemical constituent, although the percentage is low ( Jirowetz et al, 2006 ; Chaieb et al, 2007 ; Amelia et al, 2017 ; Uddin et al, 2017 ). α -Humulene is also known to have anti-inflammatory effects, suppressing the IL-5, CCL11, leukotriene B4 levels, and NF-kB and AP-1 activation ( Sa et al, 2015 ; Nuutinen, 2018 ; Kim et al, 2020 ).…”