Marine Collagen Peptides as Antioxidants: Which Sea Creatures and Extraction Methods Produce the Best Results? | Research

The takeaway

Marine collagen peptides from fish, jellyfish, and shellfish show significant antioxidant properties in lab tests, with the extraction method strongly influencing bioactivity.

Multiple marine sources confirmed
Antioxidant collagen peptides were identified from fish skin, bones, scales, jellyfish, mollusks, crustaceans, and sponges

What the researchers found

This review catalogues the antioxidant properties of collagen peptides derived from marine sources including fish (skin, bones, scales, fins, cartilage), jellyfish, mollusks, crustaceans, and sponges. The authors found that specific amino acid sequences in marine collagen hydrolysates demonstrate significant antioxidant activity, and that the extraction method used to break down collagen into peptides affects which antioxidant properties are preserved. Marine collagen peptides from both vertebrate and invertebrate sources showed potential as natural antioxidant nutraceuticals.

Why it matters

The marine collagen peptide market is booming as a supplement category, and most consumers don't know where the collagen comes from or how it's processed. This review organizes the scientific evidence behind marine collagen's antioxidant claims, identifying which marine sources and extraction methods produce the most bioactive peptides. It also highlights an environmental angle — using fish processing waste (skin, scales, bones) as a source of valuable bioactive peptides rather than discarding it.

How the study worked

The authors conducted a literature review analyzing published data on marine collagen peptides with antioxidant properties. They systematized information on extraction methods (enzymatic hydrolysis and other treatments), structural characteristics of the resulting peptides, and their measured antioxidant activities across different marine species — both vertebrate (fish) and invertebrate (jellyfish, mollusks, crustaceans, sponges).

Who was studied

Review article — no human subjects; covers laboratory analysis of marine collagen sources

What this study cannot tell us

This is a review of primarily in vitro (lab-based) antioxidant measurements. Antioxidant activity in a test tube doesn't necessarily translate to health benefits in the human body. The review doesn't systematically evaluate human clinical trial evidence for health outcomes. Extraction methods and collagen sources vary enormously, making direct comparisons difficult.

How to read the evidence

This is a narrative review of primarily in vitro research. While it provides a comprehensive catalog of marine collagen antioxidant studies, the evidence is largely limited to lab-based antioxidant assays rather than human clinical outcomes.

When this study was published

Published in 2024, this is a recent review reflecting current knowledge of marine collagen peptide research. The field is active and evolving, with new extraction technologies and clinical studies emerging regularly.

The bigger picture

The global collagen supplement market is worth billions, and marine collagen is the fastest-growing segment — driven by demand from consumers who want alternatives to bovine or porcine sources (for religious, dietary, or sustainability reasons). This review provides scientific grounding for the antioxidant claims often made about marine collagen products, while also connecting to the broader sustainability conversation about using seafood processing waste as a source of valuable biomolecules.

Questions still open

Do the antioxidant properties measured in lab tests translate to measurable health benefits when people take marine collagen supplements?
Which specific marine collagen peptide sequences are most bioactive, and can they be produced consistently at commercial scale?
How do marine collagen peptides compare to plant-based antioxidants in human studies?

Common questions

What makes marine collagen different from bovine or porcine collagen?

Marine collagen comes from fish and other sea creatures rather than cows or pigs. It's primarily type I collagen (the most abundant type in human skin and bones), tends to have smaller peptide fragments that may be absorbed more easily, and is preferred by people who avoid mammalian products for religious, dietary, or allergy reasons.

Does marine collagen actually work as an antioxidant supplement?

Lab studies consistently show that marine collagen peptides can neutralize free radicals. However, the critical question — whether swallowing these peptides in a supplement produces meaningful antioxidant effects inside your body — hasn't been firmly answered by clinical trials. The peptides may be broken down further during digestion before they can act as antioxidants.

Read the original research

Marine Antioxidants from Marine Collagen and Collagen Peptides with Nutraceuticals Applications: A Review.

Antioxidants (Basel, Switzerland), 13(8)

View on PubMed ↗Publisher’s paper ↗

Citation

Cadar, Emin; Pesterau, Ana-Maria; Prasacu, Irina; Ionescu, Ana-Maria; Pascale, Carolina; Dragan, Ana-Maria Laura; Sirbu, Rodica; Tomescu, Cezar Laurentiu. (2024). Marine Antioxidants from Marine Collagen and Collagen Peptides with Nutraceuticals Applications: A Review.. Antioxidants (Basel, Switzerland), 13(8). https://doi.org/10.3390/antiox13080919