Studies on the Active Components and Antioxidant Activities of Extracts from Aeschynanthus moningeriae

The objectives of the present study are to characterize the total flavonoids and total polyphenols and to evaluate the antioxidant activity of extracts from Aeschynanthus moningeriae in vitro. Total flavonoids content was estimated according to the NaNO2-Al(NO3)(3) method and total polyphenols content to the Folin-Ciocalteu method and antioxidant activity was assessed using two methods: DPPH, FRAP assays. In addition, the relativity among the content of total flavonoids, total polyphenols and antioxidant activity was also investigated. The obtained results revealed that Aeschynanthus moningeriae is a rich source of total flavonoids and total polyphenols and capable of strong radical scavenging activity and strong reducing power on Fe3+. The present results suggested that Aeschynanthus moningeriae could be a potential rich source of natural antioxidants.