Evaluation of the antioxidant potential of leaf and fruit extracts of Psidium guajava Linn

Abstract

The present study was conducted to analyze the antioxidant potential of leaf and fruit extracts of Psidium guajava Linn by different assays like CAT, POD, DPPH, and FRAP. Fresh fruit and leaf extracts were used to estimate catalase (CAT) and peroxidase (POD) enzyme activity. For analysis of DPPH and FRAP scavenging activity, aqueous and methanolic leaf and fruit extracts were used. The results were analyzed in comparison to the radical scavenging activity of ascorbic acid as standard. CAT and POD activity of fresh leaf was higher than fruits, DPPH assay also shows that leaf extracts have better antioxidant potential than the fruit extract while FRAP assay indicates that methanolic extracts possess more radical scavenging potential than the aqueous extracts. The bioactive compounds present in the leaf and fruit impart leaf and fruit with excellent antioxidant potential.