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Astaxanthin extracted from Red Crab edwardsii was assayed for antioxidant activity viz., total antioxidant, reducing power, hydrogen peroxide radical scavenging assay, and DPPH free radicals scavenging activity. Final concentration of astaxanthin was quantified to be 49.05 µg/g using the standard astaxanthin. The antioxidant activity was found to be 60%, hydrogen peroxide scavenging activity showed 89% inhibition, whereas 1,1 diphenyl-2-picrylhydrazl (DPPH) activity showed 86% of scavenging activity. Present investigation proves that the astaxanthin from C. edwardsii promising antioxidant source, which can be used in food, pharmacological and aquaculture sectors.

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