Marine collagen peptides are small molecule collagen fragments extracted from fish (such as cod, salmon, etc.) or marine invertebrates (such as jellyfish, shellfish). Compared to macromolecular collagen, its low molecular weight is more easily absorbed by the human body, and therefore has been widely used in the fields of skincare and health in recent years. Here are its main benefits and scientific basis for the skin:
- Improve skin elasticity and firmness
Mechanism: Marine collagen peptides are rich in glycine, proline, and hydroxyproline, which are key raw materials for synthesizing skin collagen fibers. Supplementation may stimulate the activity of dermal fibroblasts and promote the production of type I collagen (the main collagen in the skin).
Research support: A double-blind trial in the Journal of Cosmetic Dermatology in 2019 showed that women who took fish derived collagen peptides orally for 8 consecutive weeks had significantly improved skin elasticity (measured by a Cutometer). - Improve skin moisture and barrier function
Mechanism: Collagen peptides can enhance the synthesis of natural moisturizing factor (NMF) and indirectly improve the skin’s water locking ability by promoting the production of hyaluronic acid. Some studies suggest that it may regulate lipid arrangement in the stratum corneum and strengthen the barrier.
Research support: A 2014 study in Skin Pharmacology and Physiology found that oral collagen peptides can reduce transcutaneous water loss (TEWL), especially for dry skin. - Antioxidant and anti-aging properties
Advantages of marine sources: Some marine collagen peptides contain unique antioxidant peptide sequences (such as peptide segments derived from jellyfish), which can scavenge free radicals, reduce UV induced matrix metalloproteinase (MMP-1) activity, and thus delay photoaging.
Experimental evidence: Animal experiments (Marine Drugs, 2016) have shown that cod collagen peptides can reduce oxidative stress damage to mouse skin after UVB irradiation. - Assist in repairing wounds and acne scars
Clinical observation: As collagen is a scaffold material for wound repair, oral or topical administration of collagen peptides may accelerate epidermal regeneration. However, there is limited research on acne scars, and the effects vary from person to person.
Usage suggestions and precautions
Dosage: Most studies use an oral dose of 10-20g/day, which lasts for at least 8 weeks and is effective.
Combination: Combined with vitamin C can promote collagen synthesis; Avoid taking with hot drinks to prevent peptide chain denaturation.
Safety: Generally well tolerated, but individuals with seafood allergies should be cautious.
Conclusion: Marine collagen peptide has potential benefits for improving skin hydration, elasticity and anti-aging, especially as part of a comprehensive skin care strategy. But its role needs to be viewed rationally, combined with basic care such as sun protection and healthy diet to maximize the effect.