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The study aimed to purify and characterize antioxidant peptides from chicken blood hemoglobin hydrolysate. The fraction M2 (< 3 KDa) with the strongest antioxidant activity was isolated by ultrafiltration, and its DPPH (1,1‐diphenyl‐2‐picryl‐hydrazyl radical) free radical scavenging rate, ABTS [2,2′‐Azinobis‐(3‐ethylbenzthiazoline‐6‐sulphonate)] free radical scavenging rate, and iron ion chelation...