Fig. 2.

Changes in the antioxidant activity in peptides-supplemented-milk during storage period of (0, 15, and 30 days) at 4 °C as compared to synthetic antioxidant Tert-Butylhydroquinone (TBHQ), M- Control = non-supplemented milk, M-DPI = duck protein isolate-supplemented milk, M-HPI = hen protein isolate-supplemented milk, M-PSP = pepper seeds protein-supplemented milk, M-PKH = kidney bean hydrolysate-supplemented milk. Different lowercase letters indicate significant differences during storage, uppercase letters indicate significant differences between scavenging activity of milk samples (p ≤ 0.05).