What is collagen? Types and benefits of supplementation

August 13, 2026

Collagen is the most important structural protein in the human body, forming the natural framework for the skin, bones, and joints. It supports the skin's elasticity, bone mineral density, and the comfort of the musculoskeletal system, making collagen supplementation a completely safe and effective support for the body. Discover the key types of collagen, the most important benefits of using collagen, and find out whether collagen supplementation really delivers results.

Key information about collagen:

Collagen is the main structural protein that makes up the skin, bones, cartilage, tendons, and connective tissue.
Collagen provides tissues with the proper strength, resilience, and elasticity.
The main types of collagen are Type I, Type II, and Type III.
Type I collagen is found in the skin, bones, and tendons, where it is responsible for density and resistance to stretching.
Type II collagen is found in joint cartilage and the eye, where it is responsible for cushioning and joint mobility.
Type III collagen is found in blood vessels, muscles, and young skin, providing them with elasticity.
Bovine collagen is the best choice for comprehensive, all-in-one support for the condition of the skin, bones, and musculoskeletal system.
The best collagen supplement should contain 10 g of collagen peptides, vitamin C, and a clean formula free from sugar and preservatives.

Table of contents

What is collagen?
What is collagen good for?
- What does collagen help with? Collagen benefits
Different types of collagen and benefits
What is bovine collagen?
Does taking collagen produce any effects?
- When and how to take collagen
What should you know about collagen? Key facts
Frequently asked questions about collagen

What is collagen?

Collagen is the most important structural protein in our body, serving as an exceptionally strong binding agent or framework. It makes up approximately one-third of all the proteins in the human body and is responsible for connecting and strengthening tissues. It is made up of specific amino acids, such as glycine and proline, which form a structure resembling a strong and flexible braid. This structure perfectly illustrates how collagen works - it provides strength, resilience, and resistance to stretching for everything that requires flexibility.

What is collagen good for?

Collagen primarily provides structural support to the extracellular spaces of connective tissues. Thanks to its rigidity and resistance to stretching, it serves as an ideal natural matrix for the skin, tendons, bone structures, and ligaments. The function of collagen is to maintain the mechanical properties of the skin, such as its firmness and elasticity. It also plays an important role in blood clotting processes and in the mechanical protection of internal organs.

What does collagen help with? Collagen benefits

The benefits of using collagen include comprehensive support for skin elasticity, bone structures, and the comfort of the musculoskeletal system. Supplementing with collagen peptides provides benefits in the following areas:

Joint comfort: Collagen helps maintain the flexibility of joint structures and may support comfortable movement during everyday physical activity.
Skin condition: It improves the skin's hydration, density, and elasticity, while also helping to reduce the appearance of wrinkles.
Strong hair and nails: Collagen provides the building-block amino acids that may support stronger hair and help reduce nail brittleness.
Bone health: Collagen is an important component of bone tissue, so supplementation may help support the maintenance of proper bone structure, density, and strength.
Muscle mass: Collagen peptides may support the maintenance of muscle mass and help the body recover after exercise, especially when combined with regular physical activity.

Different types of collagen and benefits

To date, between 28 and 29 different types of collagen have been identified in the human body. However, Types I, II, and III account for 80% to 90% of the body's total collagen. Each of these types has a unique molecular structure, molecular weight, and specific distribution throughout the body's tissues, which determines their distinct biological functions. While Type I collagen predominates in tissues that require high resistance to stretching, Type II collagen is essential for structures that cushion mechanical loads, and Type III collagen is found alongside Type I, providing elasticity and supporting regeneration. The table below provides an overview of the main types of collagen:

Types of Collagen	Main Distribution	What does collagen help with
Type I	Skin (80%), bones, tendons, ligaments, blood vessels, cornea, fascia, teeth.	Mechanical strength, structural support for tissues, and resistance to stretching.
Type II	Joint cartilage (90-95% of the extracellular matrix), vitreous body of the eye.	Joint health, shock absorption, and resistance to compressive forces.
Type III	Skin (15%), blood vessels, internal organs, menisci, muscles.	Tissue elasticity, the early stages of wound healing, and regulation of collagen fiber diameter.

Type I collagen

Type I collagen is the most abundant protein in the human body, accounting for more than 90% of the body's total collagen. It is characterized by a fibrous structure with exceptional tensile strength, making it the mechanical foundation of the body's tissues.

The main locations of Type I collagen include:

Skin: It makes up 80% of the skin's dry weight, providing its density and structure.
Skeletal system: It is the primary organic component of bones and teeth.
Soft tissues: Tendons, ligaments, fascia, and the cornea of the eye.
Circulatory system: The walls of blood vessels.

Properties and functions:

Provides tissues with mechanical strength and structural support.
Essential for skin elasticity and minimizing the appearance of wrinkles.
Supports bone regeneration and mineralization.

Type II collagen

Type II collagen is the key structural protein of joint cartilage, where it makes up 90% to 95% of the extracellular matrix. It is produced exclusively by specialized cells called chondrocytes. Due to its unique shock-absorbing properties, supplements based on this type of collagen (often sourced from chicken cartilage) are commonly chosen by athletes and physically active individuals to help protect the musculoskeletal system.

The main locations of Type II collagen include:

Hyaline cartilage: Covers the surfaces of joints.
Eye: The vitreous body of the eye.

Properties and functions:

Forms a network of fibers responsible for shock absorption and resistance to compressive forces.
Helps reduce joint tenderness and improve joint mobility.
Stimulates chondrocytes to produce the natural cartilage matrix.

Type III collagen

Type III collagen is the second most abundant type of collagen (up to 15% of the collagen found in the skin) and is usually found in the same tissues as Type I collagen. It plays a specific regulatory role by influencing the diameter and structure of the fibers formed by Type I collagen. It is particularly important in tissues that require high elasticity and in processes involving rapid regeneration.

The main locations of Type III collagen include:

Blood vessels: Essential for the integrity of arteries.
Internal organs: The walls of the uterus, intestines, and other organs.
Skin: Found in high amounts in young skin and scar tissue.
Muscles and menisci: Supports the structure of skeletal muscles.

Properties and functions:

Gives tissues elasticity and resilience.
Supports wound healing (it is the dominant collagen during the early stages of tissue repair).
Maintains the mechanical stability of internal organs.

So, which type of collagen is the best?

The choice depends primarily on your goal:

Type I collagen is best for people who want to improve the appearance of their skin, slow the aging process, and strengthen their bones and nails.
Type II collagen helps maintain joint function and comfort, supports cartilage regeneration, and improves ease of movement in athletes.
Type III collagen contributes to maintaining the health of the circulatory system and the overall elasticity of soft tissues.

However, it is worth remembering that the type of collagen is not the most important factor - its form is. Research indicates that the degree of protein hydrolysis is of key importance. Collagen in the form of peptides is digested and absorbed much more efficiently, allowing it to effectively reach target tissues regardless of its original type.

What is bovine collagen?

Bovine collagen is one of the most thoroughly researched sources of collagen. It is obtained from natural bovine raw materials, primarily cattle hides and bones. Its structure is similar to the collagen found in the human body, making it highly bioavailable and generally well tolerated.

Its natural content of Type I and Type III collagen means that bovine collagen can simultaneously support the condition of the skin, joints, and bones. For this reason, it is considered one of the most versatile sources of collagen available in dietary supplements.

The main benefits of bovine collagen include:

Firmer and more hydrated skin: Bovine collagen peptides support the body's natural production of collagen and hyaluronic acid, leading to visible improvements in skin elasticity, density, and hydration. Regular use helps reduce the appearance of wrinkles while improving the skin's overall texture and smoothness.
Joint support: Bovine collagen helps maintain the proper flexibility and mobility of the musculoskeletal system. It may also help reduce feelings of stiffness and improve comfort during everyday physical activity.
Stronger bones: Bovine collagen supports the natural mineral density of bone structures and helps maintain their proper mechanical strength under everyday stress.
Improved body composition: A properly balanced daily serving of bovine collagen may provide valuable support during fat loss while promoting the maintenance and growth of lean muscle mass.
Nourishment for soft tissues: Thanks to its content of amino acids such as glycine and proline, bovine collagen supports the structure of tendons and ligaments. It may also promote recovery of the musculoskeletal system after exercise and help maintain its function.
High biocompatibility: Bovine-derived collagen has a stable structure and a high degree of compatibility with the collagen naturally found in the human body, promoting its efficient utilization.

Does taking collagen produce any effects?

Yes, the effectiveness of liquid collagen supplementation (especially in the form of hydrolyzed collagen) has been clearly confirmed by clinical studies. The hydrolysis process breaks long collagen chains into small peptides, making them easier to absorb in the digestive tract. These bioactive peptides enter the bloodstream and stimulate fibroblasts and chondrocytes to produce the body's own endogenous collagen.

If you want to learn which collagen supplement is the best, be sure to read our ranking of the best collagen supplements of 2026.

When and how to take collagen

You can take collagen in the morning if you prefer to start your day with supplementation, or in the evening before bed. The time you take collagen is not a key factor in how collagen works in the body. The most important thing is flexibility and fitting your daily serving into your routine. The optimal approach is to take exactly 10 g of collagen per day (an amount provided by Primabiotic, among others) to achieve full structural benefits. Although the amounts of collagen used in scientific studies range from 2.5 g to 10 g per day, the higher amount provides the best saturation of the body's tissues. Rather than focusing on the perfect time of day, the most important factor is consistent daily use - results typically appear after 8-12 weeks of continuous supplementation.

What should you know about collagen? Key facts

To summarize this article, collagen is a key structural protein whose natural production declines by approximately 1% per year starting as early as age 25, with this process accelerating significantly in women during menopause. Long-term use of collagen supplements with a clean formula is safe and free from significant side effects. When choosing the right product for yourself, look for a daily serving of 10 g, make sure it contains vitamin C, avoid preservatives, and verify that the manufacturer has conducted both laboratory testing and consumer studies. Regular collagen supplementation is a proven way to help maintain skin elasticity and support the mechanical strength of the joints and bones.

Frequently asked questions about collagen

Is collagen good for you?

Yes, collagen is considered beneficial for your health. It is a safe structural protein, and its supplementation has been shown to have positive effects on the body.

Is it worth taking collagen?

Yes, especially if you want to help counter the visible signs of skin aging, support joint flexibility, and promote post-exercise recovery.

When should you take collagen?

The exact time of day does not matter - you can take it in the morning or in the evening, depending on your preference. The most important factor is consistency, with the best results achieved through regular use for at least 2–3 months.

How should you take collagen?

The most convenient form is ready-to-drink liquid shots.

What does collagen help with?

It helps improve skin hydration, supports joint mobility, promotes bone density, and contributes to muscle recovery.

Is bovine collagen suitable for everyone?

It is safe for most people (approximately 3% may have a sensitivity to it); however, it is not suitable for people following a vegan diet.

Can you take collagen every day?

Yes, daily supplementation with 10 g of collagen is safe and recommended to maintain its structural benefits.

Should collagen be taken with vitamin C?

Yes, vitamin C is an essential cofactor in the process of collagen synthesis and collagen fiber cross-linking.

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