Objective of the present study was to evaluate the antioxidant activities of methanolic extract from the tissue of L. vennaemi. The methanolic extract was examined for the antioxidant activities such as total antioxidant assay, ABTS radical assay, DPPH radical assay, hydroxyl radical assay and superoxide radical assay. The methanolic extract showed antioxidant activities on dose dependent manner. The results showed the total antioxidant capacity of 10.55% - 52.43% at 50 - 250 µg/ml, ABTS radical scavenging activity of 7.88% - 49.98% at 25 - 125 µg/ml and DPPH radical scavenging activity of 12.87% - 59.81% at 10 - 160 µg/ml concentration respectively. In addition the hydroxyl radical scavenging activity of methanolic extract showed 6.37% - 40.55% at 25 - 125 µg/ml; whereas the superoxide radical scavenging activity of methanolic extract recorded 14.03 - 48.01% at 50 - 250 µg/ml concentration. In conclusion to the above results of the methanolic extract from the tissue of L. vannamei, it could be suggested as good natural antioxidant product, to be used as food and in development of future drug in pharmaceutical industries.
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