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The benefits of marine collagen

Elsa Dargier
31/03/2025
Les bienfaits du collagène marin

Marine collagen has become a staple in anti-aging skincare . Naturally present in our bodies, collagen is involved in skin elasticity, joint health, and the vitality of hair and nails. But with age, its production declines, hence the importance of supplementation . Discover everything you need to know about marine collagen, its benefits, and how to choose the right one.

What is collagen?

Collagen is a structural protein essential to the body. There are several types , each with specific functions.

Types of Collagen and Their Roles

  • Type I collagen : This is the most abundant collagen in the human body. It is present in the skin, bones, tendons, and ligaments. It improves the elasticity and firmness of the skin, and strengthens hair and nails.

  • Type II collagen : It is mainly found in cartilage. It is more readily found in bovine or avian collagen. It helps support joint health.

  • Type III collagen : Often associated with type I, it is present in the skin, muscles and blood vessels. It promotes tissue regeneration and healing.

  • Type IV collagen : It is present in the basement membranes that separate tissues. It supports cells and maintains tissue structure.

  • Type V collagen : It is also present in the skin, hair, but also the cornea and the placenta. It contributes to tissue resistance.

  • Type X collagen: it is involved in bone formation.


To date, there are 28 types of collagen, but type I is the most common in anti-aging treatments and supplements.

What is marine collagen?

Marine collagen is a protein derived from the skin, bones and scales of fish (cod, tilapia, cod, etc.). It can also be obtained from certain molluscs. Mainly type I, sometimes associated with type III, marine collagen is distinguished by better bioavailability , meaning that it is more easily assimilated by the body than other sources of collagen (bovine, avian, porcine).

What is the difference between marine collagen and bovine collagen?

Bovine collagen comes from the connective tissues of beef, while marine collagen is extracted from more sustainable resources , contributing to more eco-responsible consumption. In addition, its structure is closer to human collagen , which makes it easier to absorb. There is also avian collagen obtained from poultry, as well as porcine collagen, obtained from pork.

What is the best collagen?

The best collagen supplement depends on several criteria, including its bioavailability , its origin and its composition. Here are our tips for making the right choice:

Favor hydrolyzed collagen for better absorption

Hydrolyzed collagen (or collagen peptides) is pre-cut into small chains of amino acids, which allows the body to absorb it better and use it more efficiently.

Moving towards type I (and III) collagen for skin, hair and nails

Marine collagen is predominantly type I, which is the most abundant in our bodies and the most effective for improving skin firmness and strengthening hair and nails. Collagen that also contains type III is a plus, especially for tissue regeneration.

Thinking ecologically

Choose collagen from wild fish , sourced from sustainable fishing (MSC certified). Marine collagen is also more environmentally friendly and better assimilated than bovine or porcine collagen.

Opt for formulas enriched with synergistic active ingredients

Collagen works even better when combined with other nutrients that boost its effectiveness, such as vitamin C, hyaluronic acid, zinc, and antioxidants.

Choose a format that suits your lifestyle

To take full advantage of the benefits of marine collagen, choose a format that fits easily into your daily routine.

  • Collagen powder : easy to incorporate into a drink or smoothie

  • Drinking sticks : fast absorption and ready to use

  • Capsules : practical but lower dosage per dose

  • Energy bars : for a tasty, on-the-go snack

Why take marine collagen?

From the age of 30, collagen production decreases by approximately 1% per year . This progressive loss leads to the appearance of wrinkles, and a loss of elasticity and firmness of the skin and tissues. Marine collagen, taken alongside a healthy and balanced diet, helps supplement the body's natural production.

The effects of marine collagen on the skin

Supplementing with hydrolyzed marine collagen helps slow down the effects of time and preserve the youthfulness of the skin.

  • Improves firmness and elasticity : restores bounce and tone to the skin

  • Deeply hydrates : strengthens water retention and limits skin dehydration.

  • Reduces fine lines and wrinkles : stimulates cell regeneration for smoother skin

  • Strengthens the skin barrier : protects against external aggressions and free radicals

At DAY+, we have formulated supplements with hydrolyzed marine collagen , enriched with vitamins and antioxidants for optimal effectiveness.

Beauty tip : Combine your marine collagen treatment with hyaluronic acid for maximum hydrating and plumping effects. The ideal solution? Take the collagen as a dietary supplement and apply the hyaluronic acid directly to the skin for a combined deep and surface action.

The benefits of marine collagen for joints

Collagen is present in skin, bones, but also in joints, tendons and connective tissues . With age, its production decreases, leading to a loss of joint flexibility, brittle tendons and progressive wear of cartilage.

Regular supplementation with hydrolyzed marine collagen contributes to:

  • Relieve joint pain by maintaining cartilage elasticity and strength

  • Strengthen tendons and ligaments by promoting their regeneration

  • Prevent cartilage wear by stimulating the production of natural collagen

  • Improve muscle recovery after exercise thanks to its action on connective tissues

Athletes, subject to intense demands, as well as people suffering from osteoarthritis or chronic joint pain, can particularly benefit from a course of marine collagen to preserve their mobility and reduce inflammation.

Tip : Combining marine collagen with active ingredients such as vitamin C and zinc helps optimize its absorption and effectiveness on the joints.

How to take marine collagen?

To fully benefit from the benefits of marine collagen , it is important to know when and how to take it. Age, dosage, duration of treatment... Here is everything you need to know for effective supplementation adapted to your needs

At what age can you start taking marine collagen?

Marine collagen can be taken from the age of 30 to prevent skin aging , but also earlier in cases of dry skin, fragile hair or joint pain.

How to choose the best form of collagen supplement?

Collagen supplements come in several forms. In all cases, opt for hydrolyzed collagen or collagen peptides. This ensures better absorption by the body.

Collagen powder

Collagen powder is very convenient to use . Easy to file, it mixes perfectly into a drink like a smoothie for example, and is absorbed very quickly by the body.

At Day+, our collagen powder is made up of 3 ingredients:

  • Marine collagen peptides

  • Vitamin C and vitamin B3 for better assimilation by the body

Thanks to its neutral taste , you can mix it with all your favorite drinks.

Collagen in capsules

The capsule format is convenient to carry . However, the collagen intake per dose is limited.

Drinkable collagen

Marine collagen comes in liquid form, ideal for fast and efficient absorption. At DAY+, we've developed a convenient, drinkable collagen stick that's easy to incorporate into your routine. Its ultra-concentrated formula combines hydrolyzed marine collagen with powerful active ingredients: organic spirulina to revitalize, plant-based hyaluronic acid to hydrate, organic pomegranate with antioxidant properties, and zinc for an anti-blemish effect.

Collagen in an energy bar

Less common but just as effective, collagen energy bars are a delicious and convenient alternative . At DAY+, we've partnered with Supernature to create a wellness bar that combines nutrition and effectiveness. Enriched with vitamin C, goji berries, and matcha green tea, our collagen bar is 100% vegan and formulated with essential amino acids to naturally stimulate collagen production.

How to choose quality marine collagen?

Here are the criteria to check to choose quality marine collagen:

  • Origin : from wild fish and sustainable fishing (MSC label).

  • Type I or III and hydrolyzed : for optimal assimilation.

  • Enriched with active ingredients : vitamin C, hyaluronic acid, zinc to boost its effectiveness.

  • No additives : no artificial colors, sweeteners or flavors.

What is the ideal duration of a marine collagen treatment?

As with any dietary supplement, a 3-month course of treatment is recommended. This is often the time needed to achieve optimal results. The course can be repeated several times a year, depending on your needs. Regular intake throughout the course is essential for it to be effective.

What time of day should I take marine collagen?

There is no specific time to take collagen. In the morning, it will be perfectly absorbed on an empty stomach, but in the evening it will help the body regenerate. You can even take it before or after sports.

Can you take marine collagen every day?

It is perfectly possible to consume marine collagen on a daily basis . The important thing is to respect the recommended dosage, to be consistent in its intake and to take breaks between treatments to optimize its effectiveness.

Does marine collagen have any side effects?

Marine collagen is generally very well tolerated, however it can cause slight digestive problems in some people and present a risk of allergy for people sensitive to seafood.

Is marine collagen suitable for pregnant or breastfeeding women?

It is recommended to consult a healthcare professional before consuming anything specific during pregnancy or breastfeeding. Furthermore, it is recommended to consume it after pregnancy and breastfeeding if applicable. The drop in hormones associated with these periods can affect hair, nails, and skin. A collagen treatment will therefore be welcome to counteract the effects of this hormonal upheaval.

How long does it take to see the effects of marine collagen?

It takes between 1 and 2 months to see the first effects of a collagen treatment. However, age and lifestyle will tend to influence the speed of the effects.

Can you take marine collagen with other dietary supplements?

Marine collagen combines very well with other active ingredients such as vitamin C, hyaluronic acid, and zinc. Make sure your supplements are compatible to avoid altering their effects.

Are there any contraindications to taking marine collagen?

Marine collagen is not recommended in cases of kidney failure and allergies to fish and seafood proteins.

Discover Day+ Marine Collagen Supplements

Treat your skin and body to the best marine collagen has to offer! At DAY+, we've designed formulas based on hydrolyzed marine collagen, specially developed for optimal absorption and visible results on skin, hair, and joints.

Our supplements are highly concentrated in active ingredients, enriched with natural ingredients, and made in France , without controversial substances. In addition to our food supplements, we also offer cosmetic treatments enriched with collagen, such as our collagen eye patches , to enhance your skin every day.

Discover all our collagen treatments and find the one that's perfect for you!