Screening of antioxidant activities and their bioavailability of tropical plants

Abstract

Abstract Indonesia has many types of plants that have the potential to be used as natural antioxidants. This study aims to characterize natural sources of antioxidants from five plants species: jackfruit leaves, turmeric, black tea, soursop peels, and aloe vera. The method used involved an analysis of phytochemicals in the form of polyphenols, tannins, and flavonoids. As well as analysis of antioxidant activity using the DPPH method. The data obtained were analyzed by ANOVA (Analysis of Variance) and Duncan’s test. Based on these data, the highest yields were found in jackfruit leaves, turmeric, black tea, and aloe vera (P<0.05), while the lowest yields were found in soursop peels. Based on phytochemical data, the highest total phenol was found in jackfruit leaves and soursop skin (P<0.05). While the highest flavonoid content was found in black tea and aloe vera (P<0.05), and the highest tannin content was found in black tea and soursop skin. Based on the method of measuring antioxidant activity, it was found that jackfruit leaves and black tea had the highest antioxidant activity.