-This study was conducted to compare and analyze change of content of polyphenol and p-hydroxybenzyl alcohol (HBA), which is an index-component, and antioxidant activity between fermented Gastrodia elata Blume and non-fermented G. elata Blume. The polyphenol contents before and after the fermentation were 108.65 and 389.99 mg/mL respectively, and the content of index-component HBA increased from 2.46 mg/g before fermentation to 7.94 mg/g after fermentation. In comparison between the non-fermented G. elata Blume extract (NFGE) and fermented G. elata Blume extract (FGE) in DPPH, ABTS, and superoxide radical scavenging assay, we found that FGE showed more activity than NFGE as the extract was more concentrated. Especially, the superoxide radical scavenging activity was increased more than twenty times in FGE. In conclusion, we confirmed increase in the electron donating ability and radical scavenging when the dried G. elata Blume is fermented, and its further feasibility as an antioxidant.
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