comparative antioxidant properties of some gingerols and shogaols, and the relationship of their contents with the antioxidant potencies of fresh and dried ginger (zingiber officinale roscoe)

ginger (zingiber officinale roscoe) contains the biological properties of the major standard non–volatile pungent compounds of ginger, namely, [6]–, [8]–, and [10]–gingerols, as well as [6]– , [8]–, and [10]–shogaols. so far, the comparative antioxidant potencies among shogaols and gingerols have not been studied in detail and reported. accordingly, this study aimed to examine and compare the antioxidant abilities of the six main compounds. results showed that[6]–, [8]–, and [10]–gingerols, as well as [6]–, [8]–, and [10]–shogaols exhibited substantial in vitro antioxidant activities. the dpph•, abts•+,and frap assays results showed that the antioxidant abilities of [6]–shogaol were greatest among the six gingerols and shogaols studied (p