Antioxidant Peptides From Fish Scale Collagen Protect Liver Cells From Damage | Research

The takeaway

Collagen peptides from redlip croaker fish scales show strong antioxidant activity and protect liver cells from hydrogen peroxide-induced damage.

21.36%
Degree of hydrolysis achieved with neutrase, producing the most potent antioxidant peptide fraction from fish scale collagen

What the researchers found

Collagen peptides from redlip croaker scales, particularly the neutrase hydrolysate, show strong antioxidant activity and cytoprotective effects on liver cells.

Why it matters

Fish scale waste is an abundant, underutilized resource. Converting it to bioactive peptides creates value while providing natural antioxidants for food and health applications.

The numbers in context

6 peptides (526-886 Da); EC50 0.33-0.74 mg/mL; protected HepG2; ↓ROS/MDA; ↑SOD/CAT/GSH-Px; neutrase 21.4% hydrolysis

How the study worked

Enzymatic hydrolysis with six proteases, antioxidant activity assays (DPPH, hydroxyl radical scavenging), peptide characterization, HepG2 cell protection assays.

Who was studied

In vitro HepG2 cell protection and biochemical antioxidant assays

What this study cannot tell us

In vitro study. The bioavailability and stability of these peptides after oral consumption need to be assessed.

How to read the evidence

In vitro characterization study with cell protection data. Strong analytical chemistry but needs bioavailability and in vivo studies.

When this study was published

Published in 2020. Fish-derived bioactive peptides remain an active research area.

The bigger picture

Valorizing fish processing waste into bioactive peptides addresses both sustainability and the growing demand for natural antioxidants.

Questions still open

Are these peptides bioavailable after oral ingestion?
How do they compare to established antioxidants like vitamin C or E?
Can they be incorporated into functional food products?

Common questions

Can fish scales provide health benefits?

Yes — fish scales are rich in collagen, which can be broken down into small bioactive peptides with antioxidant properties. This study showed these peptides protect liver cells from oxidative damage.

How are collagen peptides made from fish scales?

Enzymes break down the collagen protein in fish scales into small peptide fragments. Different enzymes produce different peptide profiles. Neutrase produced the most active antioxidant peptides in this study.

Read the original research

Antioxidant Peptides from Collagen Hydrolysate of Redlip Croaker (Pseudosciaena polyactis) Scales: Preparation, Characterization, and Cytoprotective Effects on H2O2-Damaged HepG2 Cells.

Marine drugs, 18(3)

View on PubMed ↗Publisher’s paper ↗

Citation

Wang, Wan-Yi; Zhao, Yu-Qin; Zhao, Guo-Xu; Chi, Chang-Feng; Wang, Bin. (2020). Antioxidant Peptides from Collagen Hydrolysate of Redlip Croaker (Pseudosciaena polyactis) Scales: Preparation, Characterization, and Cytoprotective Effects on H2O2-Damaged HepG2 Cells.. Marine drugs, 18(3). https://doi.org/10.3390/md18030156