Assessment of antioxidant activity of Jerusalem artichoke (Helianthus tuberosus L.) tuber extracts from Phayao Province, Thailand

Abstract

DownoadedFomP125171694ondaedThe dietary intake of foods containing high levels of antioxidants is important to prevent cancer and cardiovascular diseases, and to promote good health. This study presents the first evaluation of the Jerusalem artichoke (Helianthus tuberosus L.) grown in the province of Phayao, Thailand, as a functional food with high antioxidant activity. The extraction of antioxidants from dried samples using three different solvents was investigated (ethyl acetate, dichloromethane and ethanol). Extracts were analysed for their antioxidant activity using DPPH, ABTS and ferric reducing antioxidant power (FRAP) assays. The total phenolic contents in the plant were determined using the Folin-Ciocateu method. DPPH and ABTS assays indicated that ethyl acetate extract showed the highest antioxidant property, however the high phenolic content were recorded in ethanol extract. The preliminary results indicated that the tuber of Jerusalem artichoke (Helianthus tuberosus L.) has a great potential as neutraceutical, pharmaceutical and for cosmetic industries.