What Is Marine Collagen?

Have you ever wondered why your skin doesn’t feel as firm or smooth as it used to? Or why your joints start to feel a little stiffer over time? That’s often due to a natural decline in collagen, the body’s “building block” protein that keeps your skin elastic, your joints flexible, and your tissues strong.

While our bodies produce collagen naturally, that production slows down with age — which is why many people turn to dietary supplementation to support healthy aging. One source gaining attention for its effectiveness and sustainability is marine collagen, derived from fish skins and other marine organisms. This post is dedicated to diving deep into marine collagen: what it is, how it works, and how it compares to other sources of collagen.

What Is Marine Collagen?

To begin with, there are 29 types of collagen, and the majority are Types I, II, III, and IV (source). Particularly, Type I collagen is a protein that provides structure to the body’s skin, bones, tendons, and ligaments (source). Type II collagen is a structural protein that’s the main component of cartilage and is also found in other connective tissues and bones (source). As for Type III collagen, it is a protein that provides structure and strength to connective tissues in the body, including the skin, lungs, intestinal walls, and blood vessels (source). And Type IV collagen is a protein that provides structural support and stability to cells and is a key component of basement membranes (source).

Next, marine collagen, aka fish collagen peptides, refers to collagen derived from fish or other marine organisms such as jellyfish and sponges. Specifically, it is sourced from the fish skins, scales, and bones of wild-caught fish or farmed fish. This type of collagen primarily consists of Type I collagen. To clarify, this collagen is the most abundant form of collagen in the human body and is critical for skin, bones, and connective tissue (source).

What makes marine collagen stand out is its high bioavailability, meaning it is more easily absorbed by the body compared to other collagen types. Its smaller molecular size and low molecular weight enable it to pass through the intestinal barrier more efficiently, ensuring better utilization by the body (source).

What Is Marine Collagen Good For?

Marine collagen is renowned for its versatility and potential health benefits. Thus, this study states that marine collagen is a promising biomaterial for skin anti-aging, wound healing, and bone regeneration.

Here’s a closer look at its key uses:

• skin health
• joint and bone health
• hair and nails
• gut health.

Skin Health

First, marine collagen’s high content of Type I collagen makes it a go-to supplement for improving skin elasticity and hydration. Studies suggest that regular consumption of marine collagen peptides can reduce the appearance of wrinkles and promote smoother, firmer skin.

For example, this systematic review conducted in 2021 examined 19 studies involving 1,125 participants and reported positive outcomes for skin hydration, elasticity, and wrinkle reduction.

Similarly, a 2023 meta-analysis of the clinical trial, comprising 14 studies with 967 participants, highlighted promising improvements in skin moisture and elasticity.

Likewise, a 2023 analysis of 26 studies also confirmed enhanced skin hydration and elasticity among 1,721 participants.

On top of that, this 2022 study reports that marine collagen is capable of not only delaying the natural human aging process but also healing skin injuries of varying severity.

Further, after covering publications from 1991 to 2024, this paper emphasizes the role of marine collagen in combating skin aging by minimizing oxidative stress, photodamage, and the appearance of wrinkles. The author points out that various bioactive marine peptides display such anti-aging properties as free radical scavenging, apoptosis inhibition, lifespan extension in various organisms, and protective effects in aging humans.

Joint And Bone Health

Second, because it supports connective tissue repair, marine collagen can help alleviate joint pain and stiffness. Its ability to support bone density and reduce inflammation makes it beneficial for maintaining an active lifestyle.

Thus, this 2022 review states that marine collagen is beneficial for the prevention and treatment of osteoporosis and osteoarthritis. Moreover, due to its potential to increase bone mineral density, mineral deposition, and osteoblast maturation and proliferation, collagen can target other bone-related diseases as well.

Similarly, this 2022 study established the potential of marine collagen and silica biocomposites for tissue engineering and regeneration of non-load-bearing bone tissues.

Furthermore, this 2018 investigation concluded that collagen obtained from blue shark skin revealed the most desirable property of biomaterials for the treatment of a bone disorder. Specifically, it promoted osteoblast cell growth and upregulated collagen synthesis in bone cells.

Hair And Nails

Third, there is a supposition that consuming fish collagen peptides can positively affect the hair and nails. While human studies on the use of collagen to increase hair and nail growth are lacking, the following logic seems reasonable.

Specifically, collagen is rich in amino acids, such as proline, glycine, and hydroxyproline (source). Proline is also the main component of keratin, the main hair and nail protein (source). Hence, consuming collagen that is rich in proline should promote healthy hair growth as well as strengthen brittle nails, reducing breakage and enhancing overall appearance.

Actually, I conducted my own experiment with my fingernails. Specifically, the nails on my index and little fingers used to be weak and peeled off as soon they grew a bit. After taking marine collagen for 6 weeks, I noticed that my nails grew strong on those fingers and didn’t peel anymore.  Please see the “before” and after” photos below.

Gut Health

Last, collagen peptides from various food sources can act as a source of nitrogen or carbon for microorganisms in the gut. These peptides support the production of fermentation byproducts and compounds that promote the growth of beneficial gut bacteria, functioning as prebiotics. By influencing the balance of intestinal microbiota and their metabolic activity, collagen peptides can help manage certain health conditions and support overall wellness. Their prebiotic properties contribute to fostering a favorable environment for beneficial bacteria, enhancing their prevalence within the gut ecosystem (source).

Moreover, holistic medicine practitioners believe that marine collagen supports gut health by strengthening the intestinal lining. The latter is a critical barrier that prevents harmful substances from entering the bloodstream. This benefit arises from the collagen’s rich amino acid profile, including glycine and proline. The acids promote the repair and regeneration of gut tissue. Such properties may help alleviate symptoms associated with “leaky gut syndrome.” During this condition, the intestinal lining becomes permeable, allowing unwanted molecules to pass through.

This is especially important to me because of the “leaky gut” and autoimmunity conditions that often go hand in hand. Incorporating marine collagen into my daily routine has been a vital part of my recovery journey from both.

Does Marine Collagen Work?

There is a growing body of scientific research as to whether marine collagen works. Studies indicate that collagen hydrolysates, such as marine collagen, can improve skin appearance and joint health within a few weeks of regular use. Experts highlight its superior absorption due to its high bioavailability. This ensures that the body can make the most out of the dietary supplementation (source).

Further, collagen seems to promote overall health. Fish-derived collagen is a reliable option for those seeking a sustainable and effective source. Of course, results can vary depending on lifestyle and individual needs. Yet, marine collagen seems to be a safe and effective choice among collagen products with significant potential in various health applications.

Thus, combining biomaterials with gene delivery has shown encouraging results in tissue engineering. Additionally, marine collagen, sourced from fish, jellyfish, and sponges, can aid in wound healing. Plus, it can improve blood flow and reduce the risk of infections. It also offers the benefits of enhancement of bone mineral density. Moreover, it contributes to improved skin elasticity and may slow down the aging process (source).

Marine Collagen Vs. Bovine: Which Is Better?

Unlike bovine collagen, derived from cow hides and bones, marine collagen comes from a non-land animal source. This reduces concerns related to some religious preferences as well as bovine spongiform encephalopathy (commonly known as “mad cow disease”). Additionally, marine collagen is rich in essential amino acids, particularly glycine, proline, and hydroxyproline, which are vital for collagen production and skin health (source).

When comparing bovine and marine collagen, it’s important to consider the specific health goals and preferences of the individual. Both offer valuable benefits, but there are notable differences in their composition and effectiveness.

Marine Vs. Bovine Collagen For Skin

First, marine collagen, rich in Type I collagen, is particularly beneficial for skin health, promoting skin elasticity and hydration. Bovine collagen, on the other hand, contains a mix of Types I and III collagen, which also support skin health but may be less targeted compared to marine collagen.

Marine Vs. Bovine Collagen For Hair

Because marine collagen has a higher concentration of glycine and proline, it may have a slight edge over the bovine one in promoting hair strength and growth. However, both types are effective for enhancing overall hair health.

Sustainability And Safety

In general, marine collagen production often relies on sustainable raw materials such as fish skins and scales — by-products of the seafood industry that would otherwise go to waste. It also avoids concerns related to land-based animal diseases like bovine spongiform encephalopathy. However, high-quality bovine collagen can still be a viable option for those who prefer land-based supplements.

If you’re exploring bovine options, you might find this post on perfect hydrolyzed collagen helpful. This hydrolyzed collagen is made of pasture-raised and grass-fed cows, has no additives of any kind, and comes in the most digestible and absorbable form.

What Kind Of Collagen Do I Take?

For starters, I did thorough research into available marine collagens before selecting one for myself and my husband. (Get instant access to the reviewed collagen brands here!)

As a result, I consider Pure Haven Marine Collagen Peptides supplement the best (use the PURE15 code).  

First, due to its hydrolyzed form, it is easier to absorb, which makes it more effective and helps you get the most out of your investment.

Second, it is Types I, II, III, and IV collagen, which makes it versatile.

Third, it’s gluten-free, keto-friendly, and paleo-friendly. Hence, I consider it a great holiday gift for many of your loved ones. (Check out my Non-Toxic Holiday Gift Ideas for amazing gift options under $50 and over $50.)

Moreover, the Pure Haven collagen supplement has no fillers, sweeteners, flavors, preservatives, or colorants.

Since September 2024, when I started taking this supplement, I have noticed significant improvements in my skin’s firmness. Besides, as I mentioned above, some of my fingernails that were weak, have grown enough for me to trim them!

How I take my marine collagen: I mix a tablespoonful of the supplement with 8 oz of warm water. I take it nightly before going to bed to help my body do its revitalizing work during sleep.

Conclusion: Is Marine Collage Good For You?

Collagen Truly Is The Cornerstone Of Our Connective Tissue, And Ensuring Its Levels Remain Replenished Is A Worthwhile Investment In Your Health.

To sum up, marine collagen, also known as fish collagen peptides, is derived from the skin, scales, and bones of farm-raised or wild-caught fish. It primarily contains Type I collagen, the most abundant collagen type in the human body, essential for the health and structure of skin, bones, and connective tissues.

What sets marine collagen apart is its superior bioavailability. Due to its smaller molecular size and low molecular weight, the body absorbs it more efficiently than other collagen types.

After a deep dive into marine collagen options on the market, I selected Pure Haven Skin Collagen Peptides Hydrolyzed Marine Collagen (PURE15) for me and my husband. If you’re looking for a bovine option, consider this Perfect Hydrolyzed Collagen.

Choosing between bovine and marine collagen depends on your specific needs. For those focused on improving skin health and seeking a highly absorbable supplement, marine collagen offers a compelling option due to its high bioavailability and marine collagen peptides. In any case, incorporating these sources of collagen into your routine can provide significant benefits for your skin, hair, joints, and overall vitality.

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