What Is Collagen? Benefits, Types and How to Take It

Collagen is the most important structural protein in the human body, which forms the natural framework for the skin, bones and joints. What does collagen do and is it good for health? It supports the elasticity of the epidermis, bone mineral density and the comfort of the musculoskeletal system, which makes its supplementation a completely safe and effective support for the body. Discover the key types of collagen, the most important benefits of using collagen, and learn step by step how to choose the best product with a clean composition.

Key Information about collagen:

• Collagen is the main structural protein that builds the skin, bones, cartilage, tendons and connective tissue.
• Collagen serves to provide tissues with adequate strength, resilience and elasticity.
• The main types of collagen are Type 1, Type 2 and Type 3.
• Type 1 collagen is found in the skin, bones and tendons, being responsible for density and resistance to stretching.
• Type 2 collagen is found in joint cartilage and the eye, being responsible for cushioning and joint mobility.
• Type 3 collagen is found in blood vessels, muscles and young skin, providing them with elasticity.
• Bovine collagen is the best for universal and simultaneous support of 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 composition free from sugar and preservatives.
  

What Is Collagen?

Simply put, collagen is the most important structural protein in our body, which acts like an exceptionally strong glue or framework. It accounts for as much as one third of all proteins in the human body and it is this protein that holds our tissues together. Collagen is made up of specific amino acids (including glycine and proline), which intertwine with one another like a strong, flexible braid. This structure perfectly illustrates what is collagen good for - it gives strength, resilience and resistance to stretching to everything that requires elasticity.

What Does Collagen Do in the Body?

The action of collagen primarily consists of providing structural support to the extracellular spaces of connective tissues. Thanks to its rigidity and resistance to stretching, it forms an ideal natural matrix for the skin, tendons, bone structures and ligaments. The action of collagen is responsible for maintaining 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 Are the Benefits of Collagen?

The benefits of collagen supplementation include multidirectional support for epidermal elasticity, bone structures and the comfort of the musculoskeletal system. Supplementation with collagen peptides provides benefits in the following areas:

• Joint comfort: Supports the maintenance of the flexibility of joint structures and contributes to reducing discomfort associated with everyday physical activity.
• Skin condition: Improves skin hydration, density and elasticity, and also contributes to reducing the visibility of wrinkles.
• Strong hair and nails: Provides key structural amino acids, which helps reduce nail brittleness and supports the natural shine and strength of hair.
• Skeletal system: Helps maintain proper bone mineral density and supports overall bone strength.
• Muscle mass: Promotes the growth of lean body mass and contributes to efficient recovery after exercise.
  

Types of Collagen: Type 1, Type 2 and Type 3

Between 28 and 29 different types of collagen have been identified in the human body to date; however, Types I to III account for 80% to 90% of the total mass of this protein. Each of these types is characterised by a unique molecular structure, molecular weight and specific distribution within tissues, which determines their distinct biological functions. While Type I collagen predominates in tissues that require high resistance to stretching, Type II is crucial for structures that cushion loads, and Type III coexists with Type I, providing elasticity and supporting regeneration. The table below presents a comparison of the main types of collagen:

Type 1 Collagen

Type 1 collagen is the most abundant protein in the human body, accounting for more than 90% of all collagen reserves. It is characterised by a fibrous structure with enormous tensile strength, which makes it the mechanical foundation of tissues.

Main areas where Type 1 collagen is found:

• Skin: accounts for 80% of its dry mass, being responsible for its density and structure.
• Skeletal system: it is the main 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 resistance and structural support.
• Essential for skin elasticity and minimising the visibility of wrinkles.
• Supports bone regeneration and mineralisation.
  

Type 2 Collagen

Type 2 collagen is the key structural protein of articular cartilage, where it accounts for 90% to 95% of the extracellular matrix. It is produced exclusively by specialised cells called - chondrocytes. Due to its unique cushioning properties, supplements based on this type (often derived from poultry cartilage) are frequently chosen by athletes and physically active individuals to help protect the musculoskeletal system.

Main areas where Type 2 collagen is found:

• Hyaline cartilage: lining the surfaces of joints.
• Organ of vision: the vitreous body of the eye.

Properties and functions:

• Forms a network of fibres 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 3 Collagen

Type 3 collagen is the second most abundant type of collagen (up to 15% in the skin) and is usually found in the same tissues as Type 1. It plays a specific regulatory role, influencing the diameter and structure of the fibres formed by Type 1 collagen. It is particularly important in tissues that require high extensibility and in processes of rapid regeneration.

Main areas where Type 3 collagen is found:

• Blood vessels: essential for the integrity of arteries.
• Internal organs: the walls of the uterus, intestines and other organs.
• Skin: found abundantly 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 dominant in the early stages of tissue repair).
• Maintains the mechanical stability of internal organs.
  

So Which Type of Collagen Is Best?

The choice depends primarily on your goal:

• Type 1 collagen is best for people who want to improve the appearance of their skin, slow down the ageing process, and strengthen their bones and nails.
• Type 2 collagen is helpful for maintaining joint function and comfort, supporting cartilage regeneration, and improving movement comfort in athletes.
• Type 3 collagen contributes to maintaining the health of the circulatory system and preserving the overall elasticity of soft tissues.

However, it is worth remembering that the type of collagen itself is not the most important factor - its form is. Sources indicate 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 Are the Best Sources of Collagen?

Whether collagen is good for health depends on the form of the hydrolysate, however, bovine (beef) sources are considered the best and most versatile source of this protein. Bovine collagen stands out for its exceptional stability and richness in the key Types I and III, allowing it to provide comprehensive support for the skin, bones and joints. Traditional sources also include porcine, poultry and marine raw materials. It is worth clearly emphasising that fish collagen is not necessarily better than bovine collagen – in terms of bioavailability and absorption, the key factor is the degree of hydrolysis (molecule size), not the animal species. Synthetic forms produced by modified yeast and bacteria are also appearing on the market.

What Is Bovine Collagen?

This is the most thoroughly scientifically studied source of collagen, obtained from natural bovine raw materials - mainly from the hides and bones of cattle. Due to its structure, it is ideally suited to the human body, demonstrates very high absorption and rarely causes allergic reactions. Thanks to its natural abundance of Types I and III, bovine collagen effectively supports youthful-looking skin, joint flexibility and strong bones at the same time, making it the most versatile choice on the market.

Main Benefits of Using Bovine Collagen:

• Firming and hydrating the skin: Bovine peptides support the body's natural production of its own collagen and hyaluronic acid, leading to a visible improvement in skin elasticity, density and hydration. Regular use helps reduce the visibility of wrinkles and improves the overall texture and smoothness of the skin.
• Joint support: Supplementation supports optimal mobility and flexibility of the musculoskeletal system, helping to reduce feelings of stiffness and decreasing everyday discomfort associated with physical activity.
• Strengthening the skeletal system: Bovine collagen supports the natural mineral density of bone structures and contributes to maintaining their proper mechanical strength under everyday stress.
• Improved body composition: An appropriately balanced daily serving of bovine collagen may provide valuable support during fat loss while also helping to maintain and increase lean muscle mass.
• Nourishment of soft tissues: Thanks to its high content of amino acids such as glycine and proline, this collagen strengthens the structure of tendons and ligaments, supporting the efficient regenerative capacity of the musculoskeletal system after exercise and helping to protect it from overload.
• High biocompatibility: Bovine sources of collagen are characterised by high purity, stability and a structure that is most similar to human collagen, ensuring efficient and effective utilisation of the supplied protein by the body.
  

Are Collagen Supplements Effective?

Yes, the effectiveness of oral collagen supplementation (particularly in the form of hydrolysates) has been clearly confirmed by clinical studies. The hydrolysis process breaks long protein chains down 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.

How to Choose a Good Collagen Supplement

A good collagen supplement should stand out for its simple, effective composition and a form that makes regular use easy. When purchasing, it is worth following the criteria below:

• Liquid and convenient form: Ready-to-drink collagen shots are the most convenient solution, as they do not require measuring powder or swallowing large capsules.
• Good taste: The supplement should simply taste good, which directly makes it easier to maintain a daily routine without hassle.
• High amount (10 g): Choose products that provide exactly 10 g of collagen per daily serving, which ensures optimal saturation of the tissues.
• Collagen peptide form: A hydrolysate with a low molecular weight is absorbed much more efficiently than traditional native collagen.
• Bovine origin: Bovine collagen is characterised by high biocompatibility, low immunogenicity and a rich content of Types I and III collagen.
• Vitamins in the formula: The product should contain a vitamin complex, including vitamin C as an essential ingredient, which is a necessary cofactor for the synthesis of new collagen fibres.
• No preservatives or colourings: A clean composition guarantees the safety of long-term use.
• No added sugar: A good supplement should not contain unnecessary sugar or sweetening syrups.
• Manufacturer's research: Choose brands that invest in their own research – both survey-based studies (consumer satisfaction) and advanced instrumental testing (confirming the actual impact on tissues).
  

Who should Take Collagen Supplements?

Collagen supplementation is recommended primarily for people who want to replenish its natural loss that occurs in the body with age - this process begins as early as the age of 25, when the production of this protein decreases by around 1% per year. The main groups for whom structural support with collagen is particularly beneficial include:

• People who care about the appearance of their skin, hair and nails: Collagen supports optimal hydration, density and elasticity of the epidermis, which helps reduce the visibility of wrinkles. Additionally, it supports the condition of skin appendages, helping to reduce nail brittleness and supporting the natural strength, shine and thickness of hair.
• Athletes and physically active individuals: Collagen peptides support the body's regenerative capacity after intense exercise, help reduce the feeling of muscle fatigue and promote the maintenance of physical performance following overload. Collagen also strengthens the structure of tendons and ligaments, helping to protect the musculoskeletal system from everyday training demands.
• Women during menopause: During the first 5 years of menopause, collagen levels in the skin can decline sharply by as much as 30%, leading to loss of firmness and increased dryness. Regular intake of this protein helps counteract these processes and supports the maintenance of proper bone density and strength.
• People experiencing joint discomfort and stiffness: Supplementation has a beneficial effect on the musculoskeletal system, supporting the flexibility, mobility and overall function of joint structures during everyday activities.
• Mature adults and seniors: As the years pass, not only does tissue elasticity naturally decrease, but overall muscle strength and bone resilience also decline. Collagen, especially when combined with moderate physical activity, helps maintain lean body mass and supports the mechanical strength of the skeletal system.
• People recovering from skincare and aesthetic procedures or during wound healing: Due to its fundamental structural role in connective tissue, collagen provides excellent support for maintaining the proper structure, elasticity and smoothness of regenerating skin.
  

What Should You Know About Collagen? Key Information

In summary, collagen is a key structural protein whose natural production declines by around 1% per year starting after the age of 25, and this process significantly accelerates in women during menopause. Long-term use of supplements with a clean composition is safe and free from significant side effects. When choosing the ideal product, you should aim for a daily dose of 10 g, ensure the presence of vitamin C, avoid preservatives, and verify whether the manufacturer conducts both instrumental and survey-based studies. Regular supplementation is a proven way to maintain skin elasticity and support the mechanical strength of joint and bone structures.

Frequently Asked Questions About Collagen:

Is collagen good for you?

Yes, whether collagen is good for health is confirmed - it is a safe structural protein, and its supplementation shows beneficial effects on the body.

Is it worth taking collagen?

Yes, it is worth it, especially to counteract visible signs of skin ageing, support joint elasticity, and aid post-exercise recovery.

When to take collagen?

The exact time of day does not matter - you can take it in the morning or evening, adjusting supplementation to your own preferences. The most important factor is strict consistency, and key effects come from regular use for at least 2-3 months.

How to take collagen?

The most convenient form is liquid shots.

What does collagen help with?

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

Is bovine collagen suitable for everyone?

It is safe for most people (around 3% may have sensitivity), but it is not suitable for those following a vegan diet.

Can you take collagen every day?

Yes, daily supplementation of 10 g is safe and recommended to maintain structural effects.

Should collagen be taken with vitamin C?

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

Bibliography:

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Naomi, R. et al. (2021). Current Insights into Collagen Type I. Polymers.

Virgilio, N. et al. (2024). Absorption of bioactive peptides following collagen hydrolysate intake: a randomized, double-blind crossover study in healthy individuals. Frontiers in Nutrition.

Choi, F. D. et al. (2019). Oral Collagen Supplementation: A Systematic Review of Dermatological Applications. Journal of Drugs in Dermatology.

Wang, C. et al. (2020). Type III Collagen is a Key Regulator of the Collagen Fibrillar Structure and Biomechanics of Articular Cartilage and Meniscus. Matrix Biology.

Ivaskiene, T. et al. (2025). Collagen supplementation and regenerative health: advances in biomarker detection and smart material integration. Frontiers in Nutrition.

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