Quick Answer
Marine collagen is higher in Type I collagen (the primary type in skin, hair, and nails), has smaller peptide size for better absorption, and is the preferred choice for skin-focused benefits. Bovine collagen contains both Type I and Type III collagen, making it broader for gut, joint, and connective tissue support. For skin, hair, and anti-aging goals, marine collagen — particularly a clinically studied source like Peptan® — is the stronger choice.
Where Each Comes From
Marine collagen is derived from fish — typically the skin, scales, and bones of wild-caught fish. Peptan®, the marine collagen in LAKA® C3, is sourced from sustainably caught fish and is one of the most extensively clinically studied collagen ingredients available.
Bovine collagen is derived from the hides, bones, and cartilage of cattle. It's widely available and has a long history of use in supplements and food products.
Collagen Types: What They Do
There are 28 known types of collagen in the human body, but three dominate in supplements:
- Type I: The most abundant collagen in the body. Found in skin, tendons, ligaments, bones, and teeth. Primary target for skin, hair, and nail benefits.
- Type II: Found primarily in cartilage. Relevant for joint support. Not typically present in marine or bovine hide collagen.
- Type III: Found alongside Type I in skin and blood vessels, and in gut tissue. Relevant for gut integrity and skin elasticity.
Marine collagen: Predominantly Type I — highly concentrated and targeted.
Bovine collagen: Types I and III — broader coverage across skin and gut.
Bioavailability: Marine Wins
This is the most significant practical difference. Marine collagen peptides have a lower molecular weight than bovine collagen peptides — typically around 2,000 Daltons vs. 3,000–5,000 Daltons for bovine. Smaller peptides are absorbed more efficiently through the intestinal wall and reach target tissues faster.
Multiple studies have confirmed that marine collagen peptides, including Peptan®, demonstrate superior absorption rates compared to bovine collagen. For skin-focused benefits, this bioavailability advantage is meaningful.
Clinical Evidence
Marine collagen (Peptan®): Peptan® has an extensive clinical dossier with over 20 published human studies covering skin hydration, elasticity, wrinkle reduction, joint comfort, bone density, and sports recovery. It's one of the most studied collagen ingredients in the world.
Bovine collagen: Also well-studied, with strong evidence for joint support (particularly Type II for cartilage) and gut health. The evidence base for skin benefits is solid but generally shows slightly lower effect sizes than marine collagen in head-to-head comparisons.
Sustainability & Sourcing
Marine collagen: Utilizes fish parts (skin, scales) that would otherwise be discarded — making it a byproduct of the fishing industry rather than a primary product. Peptan® is sourced from sustainably caught fish with full traceability.
Bovine collagen: A byproduct of the beef industry. Quality and sustainability vary significantly by source. Grass-fed, pasture-raised sourcing is the standard to look for.
Dietary Considerations
Marine collagen: Suitable for pescatarians. Not suitable for vegans or those with fish allergies.
Bovine collagen: Not suitable for those avoiding beef for religious, ethical, or dietary reasons.
Which Should You Choose?
- For skin, hair, and nails: Marine collagen (Type I, higher bioavailability) — Peptan® is the gold standard
- For gut health: Either works; bovine Type III has a slight edge for gut lining support
- For joints: Type II collagen (from chicken sternum or specific bovine cartilage sources) is most targeted; both marine and bovine Type I/III provide supporting amino acids
- For overall daily use: Marine collagen covers the highest-demand use cases (skin, hair, nails) with the best absorption profile
The Bottom Line
Both marine and bovine collagen are legitimate, well-researched supplements. For skin-focused benefits and maximum bioavailability, marine collagen — especially from a clinically validated source like Peptan® — is the stronger choice. For broader connective tissue and gut support, bovine collagen's Type I + III profile has advantages. If you're choosing one daily supplement for skin, hair, and overall collagen replenishment, marine wins.