Antioxidant Properties of Tilapia Skin Collagen Peptides


  • Nuttapong Jantaratch -
  • Wanchai Worawattanamateekul
  • Jirapa Hinsui Department of Fishery Products, Faculty of Fisheries, Kasetsart University


ABTS, antioxidants peptides, fish skin, tuna pepsin, ultrafiltration


Tilapia processing wastes (skin, bone and scale) can be utilized to reduce waste and environmental problems. Tilapia skin mostly contain of collagen and suitable for collagen hydrolysate extraction. The objective of this research was to study relationship between molecular weight and amino acids on antioxidant properties of tilapia skin collagen peptides. Tilapia skin collagen peptides was isolated by ultrafiltration (1, 5 and 10 kDa). Soluble proteins, antioxidants activities and amino acids composition were analyzed. The extracted collagen hydrolysate had high antioxidant activity of ABTS and FRAP. There are 3 group of ultrafiltration peptide fractions by molecular weight: <1kDa, 1-5kDa and >10kDa. The <1kDa peptide fraction had the highest antioxidant activity (ABTS and FRAP). Molecular weight of peptide fraction influenced on antioxidant properties more than amino acid composition. Tilapia skin collagen hydrolysate, was fishery processing by-product, contributed to antioxidant activity and useful in the development of dietary supplement.


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