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Phycocyanin isolated from Anabaena biomass was in‐vitro assayed for its antioxidant activity against DPPH (2,2‐diphenyl‐1‐picrylhydrazyl) and ABTS [2,2′‐azino‐bis(3‐ethylbenzothiazoline‐6‐sulfonic acid)] free radical, revealing maximum activities amounting to 77 and 80% at 1,000 µg/ml and SC50 values about 96 and 111 µg/ml, respectively. A biological experiment was conducted, involving 40 male Wistar...