ABSTRACT
Many decoctions from traditional pharmacopoeia are used to treat Covid-19 contain zingiber officinale rhizomes (gingembre). One of its mechanism of action would come from its antioxidant proprerty due to the presence of phenolic compounds .We therefore determined the contents of polyphenols, flavonoids and antioxidant activities on water, alcoholic and hydroalcoholic extracts of gingembre harvested from Bangangte, Bafang, Kekem, Santchou and Melong. The mean contents of polyphenols expressed in mEgAT/g ES were 155,91 +or-18,22;321,46 +or- 71,90;136,44 +or- 28,44 in aqueous,, hydro alcoholic and alcoholic extracts respectively. Those of flavonoids expressed in mEg Quer/g ES were 45,24+or- 13,49;125,43+or-14,88;76,52+or-10,80. Antioxidant activities measured according FRAB (1,34+or-0,42 ng/ ml;2,08+or-0,59 ng/ml;1,64+or-0,49.) and PAP (1,82+or-0,51 ng/mL;2,46+or-0,52 ng/mL;2,06+or-0,50 ng/ mL) methods vary according to the type of extract . Polyphenol, flavonoids contents and antioxidant activities from Melong were higher than those of the other sites.