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Visorių g. 2, Vilnius
Published 27/03/2026

Types of collagen differ in their functions, so choosing the wrong type means the supplement simply won't work where you expect results. Type I supports skin and bones, Type II supports cartilage, and Type III strengthens blood vessels and organs.

The most common mistake when choosing a collagen supplement is focusing only on the source (marine, bovine) while ignoring the collagen type and its application for a specific purpose. What works for joints may not necessarily help the skin, and vice versa. The degree of hydrolysis and additional substances, such as vitamin C, directly determine how much collagen the body actually absorbs.

Below you will find a detailed comparison of each collagen type, source, and form with practical recommendations according to the goal. If you are just getting acquainted with this protein, start with the basics of collagen, and if you already know what you are looking for, go straight to the section relevant to you.

What is collagen and why is it important for the body?

Collagen is the most abundant protein in the human body, making up about 30% of all proteins. It performs a structural function in the skin, bones, tendons, and cartilage, acting as a biological scaffold that keeps tissues strong and elastic.

The strength of this protein comes from its unique structure. Three amino acid chains, dominated by glycine, proline, and hydroxyproline, twist into the so-called triple helix. This structure gives tissues tensile strength, which allows tendons and skin to maintain mechanical strength.

From about 25 years of age, the body produces about 1–1.5% less collagen each year. Over time, this leads to visible changes: the skin loses elasticity, joints become stiffer, and bone density decreases.

Certain factors accelerate this process. UV radiation breaks down collagen fibers in the skin, smoking inhibits the synthesis of new fibers, and excess sugar causes glycation, which hardens collagen molecules and reduces flexibility. Inadequate nutrition, especially vitamin C deficiency, also contributes to faster degradation.

Decrease in collagen production with age and accelerating factors

Types of collagen: differences and functions of types I, II, III, IV, and V

Scientists have identified at least 28 types of collagen, but types I, II, and III make up about 80–90% of the body's total collagen. These are the most relevant when choosing supplements.

Collagen type (I, II, III) and source (marine, bovine, chicken) are different classifications. Type indicates the function in tissues, while source indicates from which source the collagen is obtained.

Comparison table of collagen types I II III IV V – functions and location in the body

Type I collagen: skin, bones, tendons, and nails

Type I collagen makes up about 90% of all skin and bone collagen. It provides the skin with strength and elasticity, strengthens the mineral structure of bones, increases the tensile strength of tendons, and the hardness of nails.

Marine collagen, obtained from fish skin and scales, is mostly composed of Type I. For this reason, it is especially popular among those looking for collagen for facial skin. The lower molecular weight of marine collagen leads to faster absorption through the intestines.

Type II collagen: for cartilage and joint health

Type II collagen is the main structural protein of cartilage, ensuring joint cushioning and smooth movement. This type dominates where bones meet bones.

Undenatured Type II collagen (UC-II) works differently than hydrolyzed collagen. Instead of simply providing amino acids as building material, UC-II, taken in small doses (about 40 mg per day), modulates the immune response and reduces inflammation in cartilage. Hydrolyzed collagen, on the other hand, acts as a direct material for tissue repair.

For athletes and older people experiencing joint stiffness or discomfort, Type II collagen is a priority choice. In "Papildų pasaulis" collagen assortment, you will find products for both cartilage and general joint care.

Type III collagen: blood vessels, organs, and muscles

This type is often found together with Type I collagen, especially in blood vessel walls, intestinal tissues, the uterus, and muscle structures. Due to this natural overlap, bovine collagen provides both Type I and Type III collagen in one product, making it suitable for universal use.

Type III collagen actively participates in the wound healing process: the body first produces this type at injured sites, and later replaces it with the stronger Type I.

Types IV and V collagen: basement membranes and cell surfaces

Type IV collagen forms basement membranes that act as filtering layers between tissues, for example in the kidneys and skin. Type V is found in the placenta, hair structures, and cell surfaces.

These types are rarely found separately in dietary supplements. The body naturally produces them when it receives enough amino acids and vitamin C.

Sources of collagen origin: marine, bovine, chicken, and plant-based

Once the required type of collagen is identified, the next step is to choose the source of origin. The origin indicates from which animal the product is derived and directly determines which types of collagen it contains.

Marine collagen: absorption, benefits, and suitability?

Marine collagen is obtained from fish skin and scales, mostly composed of Type I collagen. Due to its lower molecular weight, it is absorbed faster than bovine collagen, and studies show up to 1.5 times better bioavailability. This is why it is especially popular for skin elasticity and hydration purposes.

The higher price and sometimes noticeable fishy aftertaste are the main drawbacks worth considering. Read more about the characteristics of this source in the marine collagen review.

Bovine and chicken collagen: types and advantages

Bovine collagen naturally provides Type I and Type III collagen in one product, making it suitable for universal purposes: skin, bones, blood vessels, and muscle tissues. In terms of price and quality ratio, it is often the most affordable choice on the market.

Chicken collagen is the main source of Type II collagen, especially used in joint supplements. This origin is most often recommended for athletes and older people with cartilage problems.

Vegan collagen: does it really work?

Plants do not produce collagen, so true vegan collagen simply does not exist. Products with this label are actually mixtures of collagen synthesis precursors: amino acids (glycine, proline), vitamin C, and zinc. These components can stimulate the body's collagen synthesis but are not a direct substitute for collagen.

A promising alternative is recombinant collagen produced with the help of genetically modified yeasts or bacteria. However, this biotechnology rarely reaches the supplement market so far, and its price remains significantly higher than animal-derived products.

Hydrolyzed collagen and collagen peptides: why is absorption important?

Enzymatic hydrolysis breaks down collagen proteins into small molecules (2–5 kDa) called collagen peptides. Due to their small molecular weight, peptides are effectively absorbed through the intestine and enter the bloodstream, where the body uses them as building material to repair tissues.

Undenatured collagen, such as UC-II, works completely differently: small doses (about 40 mg) modulate the immune response in cartilage rather than directly supplying amino acids. Hydrolyzed and undenatured collagen complement each other but are not interchangeable.

The most popular forms of hydrolyzed collagen on the market:

  • Powders – the most versatile and economical, easily mixed into drinks.
  • Liquid collagen and shots – convenient for use on the go, no preparation needed.
  • Capsules – precise dosing without taste or flavorings.

All these forms work equally well if the collagen is properly hydrolyzed. The choice depends on lifestyle and convenience. Those seeking the best price-quality ratio usually choose collagen powders.

Comparison of absorption processes of hydrolyzed collagen and undenatured UC-II

How to choose the type of collagen according to the goal?

The right choice of collagen depends on the specific problem you want to address. Here is a practical guideline structure:

  • Skin and wrinkles: Type I, marine or bovine collagen.
  • Hair and nails: Type I, marine collagen.
  • Joints and cartilage: Type II, chicken or undenatured (UC-II) collagen.
  • Bones and tendons: Type I, bovine collagen.
  • General health support: Type I and III, bovine collagen.

For those seeking skin elasticity, Verisol® collagen peptides are among the most scientifically studied and associated with visible skin condition improvement. You can learn more about the effects on hair and nails separately.

Collagen alone does not work at full capacity. Vitamin C is essential for collagen synthesis as it participates in hydroxyproline formation. MSM can enhance the effect of Type II collagen for joint health, while zinc and hyaluronic acid complement skin hydration and elasticity.

Types of collagen: frequently asked questions

What is the difference between Type I, II, and III collagen?

Type I dominates in the skin, bones, and tendons. Type II forms the basis of cartilage and supports joint function. Type III is found in blood vessels, organs, and muscles. Together, these three types make up about 80–90% of all collagen in the body.

Which type of collagen is best for the skin?

Type I collagen makes up about 80% of the skin's structural protein. Marine hydrolyzed collagen is absorbed faster due to its lower molecular weight, so it is often recommended to improve skin elasticity and hydration.

Which collagen is suitable for joints and cartilage?

Type II collagen, especially undenatured (UC-II), is the best scientifically supported choice for joint health. It works through the immune system by reducing cartilage inflammation. Hydrolyzed collagen with vitamin C can also support cartilage regeneration.

What is the difference between marine and bovine collagen?

Marine collagen is mainly composed of Type I and is absorbed faster due to its lower molecular weight but costs more. Bovine collagen naturally provides Type I and III collagen, making it more versatile and economical.

Can Type I and II collagen be taken together?

Yes, Type I and II collagen affect different tissues and do not interfere with each other. Type I supports skin and bones, Type II supports cartilage.

Is it worth taking collagen supplements with vitamin C?

Vitamin C is essential for collagen synthesis as it participates in hydroxyproline formation. It is recommended to take 50–200 mg of vitamin C daily together with collagen supplements.

At what age is it worth starting to take collagen?

From about 25 years old, collagen production naturally decreases by about 1–1.5% annually. Those who are actively exercising or have joint problems can start earlier. Young healthy people usually get enough from a balanced diet with sufficient protein intake.

The choice of the right type of collagen depends on your goals, but the quality of the product itself is equally important. Hydrolyzed collagen peptides supplemented with vitamin C ensure better absorption and more effective collagen synthesis in the body. Whether you aim to support skin, strengthen joints, or speed up recovery after workouts, it is worth choosing proven and transparent supplements.

On the "Papildų pasaulis" website, you will find a wide range of collagen products tailored for active and sporty people.

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