Marine collagen (fish-derived)

Tier 2 — promising · Skin · Joint · Bioavailability

Fish-derived collagen peptides with smaller molecular weight than bovine collagen, potentially improving absorption. Proksch et al. 2014 (Skin Pharmacol Physiol, bovine collagen hydrolysate) and subsequent trials with marine collagen peptides found significant improvements in skin hydration, elasticity, and wrinkle depth at 8–12 weeks. Primarily type I collagen, which is the dominant collagen in skin. Suitable for people who avoid bovine or porcine products. More expensive than bovine collagen.

Dose: 5–10 g/day marine collagen peptides; type I collagen — best for skin; take with vitamin C