Abstract:

Objective: To explore the antioxidant activity, moisture-absorbing and moisture-retention properties of collagen peptides from different sources. Methods: The antioxidant activities of collagen peptides from different sources were evaluated by determining their scavenging activities on 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2’-azino-bis-2-ethybenz-thiazoline-6-sulfonic acid (ABTS+) free radicals and their reducing power. Results: The collagen peptide from donkey revealed the strongest scavenging activity on DPPH free radicals with IC50 of 0.63 mg/mL. The collagen peptide from Alaska pollack skin exhibited stronger scavenging activity on ABTS+ free radicals with an IC50 of 0.12 mg/mL. Meanwhile, the collagen peptide from donkey also exhibited the strongest reducing power, which was 0.61 at the concentration of 10 mg/mL. The moisture-absorbing and moisture-retention rates of collagen peptide from donkey were 10.17% and 98.90% under the relative humidity of 43%. Conclusion: The collagen peptide from donkey can be used as a good additive in functional food and cosmetics.

Key words: collagen peptide, antioxidant activity, moisture-absorbing property, moisture-retention property