Marine Collagen: Benefits, Evidence & How to Use It

Collagen is the single most abundant protein in the human body, comprising roughly one-third of total protein content. It forms the structural foundation of skin, hair, nails, bones, cartilage, tendons, and ligaments — essentially the fibrous scaffolding upon which beauty and mobility are built.

The word Collagen comes from the Greek kolla, meaning "glue," reflecting the gelatinous quality people noticed in bone broth centuries before modern science explained the biology. Marine Collagen — sourced from fish skin and scales rather than bovine or porcine tissue — emerged as researchers sought alternatives free from concerns like bovine spongiform encephalopathy and religious dietary restrictions.

Marine Collagen is rich in the amino acids glycine, proline, and hydroxyproline. These amino acids form Collagen's characteristic triple-helix structure and provide rigidity and resistance to stretching. Because native Collagen is a large, complex molecule with low bioavailability, supplement forms undergo enzymatic hydrolysis to produce smaller peptides (typically 3–6 kDa) that can be more readily absorbed. Studies show that when hydrolyzed Collagen is taken orally, it is absorbed as di- and tripeptides rich in hydroxyproline, which enter circulation and may reach target tissues like skin and cartilage where they help support Collagen-producing cells called fibroblasts.

Twenty-eight subtypes of Collagen have been identified, but Types I, II, and III account for 80–90% of the Collagen in the human body. Type I alone makes up approximately 80% of the Collagen in skin and predominates in tendons, organs, bone, and vascular connective tissue.

Skin Elasticity, Hydration, and Anti-Aging

Skin aging is accompanied by declining Collagen content, along with reduced elastin fiber and hyaluronic acid, resulting in loss of elasticity and hydration. Multiple randomized controlled trials and meta-analyses suggest that oral Collagen supplements may help improve these markers. A systematic review and meta-analysis of 10 RCTs (646 participants) found that Collagen supplements were statistically effective in increasing skin hydration and elasticity. Fibroblasts appear to recognize bioactive peptides such as Pro-Hyp and Gly-Pro-Hyp, upregulating the synthesis of new Collagen and hyaluronic acid.

A systematic review published in the Journal of Drugs in Dermatology (2019) concluded that preliminary results are promising for the short- and long-term use of oral Collagen supplements for skin aging, noting increases in skin elasticity, hydration, and dermal Collagen density. However, many trials have been industry-funded, study durations are often short (4–12 weeks), and robust evidence from large independent trials remains limited.

Hair and Nail Support

Collagen peptides provide amino acid substrates — notably proline, glycine, and hydroxyproline — that support keratin synthesis and the dermal matrix surrounding hair follicles. A systematic review found Collagen peptides may improve the clinical appearance, strength, and brittleness of hair. For nails, an open-label trial found that 2.5 g/day of bioactive Collagen peptides for 24 weeks increased nail growth rate by 12% and reduced the frequency of broken nails by 42% in women with brittle nail syndrome. While these results are encouraging, the overall evidence for hair and nails remains at an early stage.

Joint Health and Mobility

Research suggests that Collagen peptides may support joint comfort and mobility. A meta-analysis published in 2023 found significant pain reduction in knee osteoarthritis patients who received Collagen peptides compared to placebo. A systematic review of 15 RCTs in athletes found that Collagen supplementation increased pain-free time to exertion and supported Collagen synthesis, with beneficial effects appearing after three or more months of consistent use.

Bone and Connective Tissue

Preliminary research in postmenopausal women with osteopenia suggests that Collagen supplementation may support bone strength, density, and mass. Additionally, Collagen peptide supplementation combined with exercise may support musculoskeletal tissue remodeling. These findings are promising but require larger, independent replications.

Gut Health

Collagen lines the gastrointestinal tract and is a component of gut epithelial tissue. While this product highlights gut health support, the current clinical evidence in this area remains at an early stage.

Marine Collagen may be a good fit for anyone looking to support the structural proteins their body relies on every day. It is particularly well-suited for:

• Those concerned with skin aging: If you're noticing changes in skin elasticity, hydration, or firmness, research suggests that daily Collagen peptides may help promote a more youthful appearance over time.
• People seeking hair and nail support: Collagen peptides provide the amino acid substrates that support keratin synthesis, the structural protein of hair and nails.
• Active individuals: Whether you're a recreational athlete or simply enjoy staying active, studies suggest Collagen peptides combined with exercise may support joint comfort and connective tissue health.
• Those following special diets: This product is non-GMO, dairy-free, gluten-free, Keto-friendly, and Paleo-friendly, making it compatible with a range of dietary lifestyles.

Collagen is an incomplete protein — it lacks the essential amino acid tryptophan — so it should not be used as a sole protein source. If you have a seafood allergy, speak with a healthcare provider before using marine Collagen, as individuals with fish allergies may develop allergic reactions.

If you're unsure whether marine Collagen is right for you, our naturopath is available for a free consultation to help you explore your options.

Collagen is odorless, tasteless and mixes easily into any hot or cold beverage, smoothie or food. It is easily integrated into any daily wellness program. Stir 1 scoop into any beverage (coffee, tea, water, fruit juice, etc.), or add it to your favorite recipes. Use daily for best results.

Research suggests that the beneficial effects of Collagen peptides may take effect after three months or longer of consistent use, so daily incorporation into your routine is key. Emerging data also suggest that co-supplementation with vitamin C may further support Collagen synthesis, since vitamin C is a required cofactor in the hydroxylation of lysine and proline residues during the body's own Collagen production.