Different Types of Collagen (Type I, II, III & More) Explained

December 5, 2025

Different Types of Collagen (Type I, II, III & More) Explained

By Ethniq Med

Introduction 

Collagen is a structural protein that holds the body together. It makes the outline of skin, bone, cartilage and connective tissue. Its role is not limited to strength and elasticity. Collagen also supports repair and regeneration, which makes it important to maintain young skin and flexible joints.   
To understand how collagen supplements work, it is important to look at different types of collagen, as each one provides a unique purpose. 

Main Types of Collagen 

Type 1 Collagen 

Your body contains 90% of Type 1 collagen which stands as the most abundant protein structure. The main structure of bones consists of Type 1 collagen which also forms the basis of skin, tendons and ligaments

Type 1 collagen exists as tightly packed fibres which 
contain amino acids as their fundamental protein components. The main ingredient of this type of collagen supplement consists of marine (fish) collagen extracts. Your body can easily absorb and utilize this type of collagen because they have high bioavailability.
 

Key Benefits: 

Type 1 collagen offers the most visible benefits for skin and bone health. It helps to maintain skin elasticity, promotes hydration and keeps the surface smooth. 
 
Beyond the skin, it supports bone density, aids in wound healing and strengthens tendons and ligaments. Many people have also noticed improvement in hair thickness and nail strength. 

Type 2 Collagen 

Type 2 collagen functions as a primary structural element in cartilage tissue which serves as a joint cushioning material. This also enables smooth joint movement. The human body contains less type 2 collagen than type 1 collagen but it remains vital for maintaining joint health. (Source: H&B) 

This collagen contains the same amino acids as type 1 collagen but its structure differs from the other types. Type 2 collagen forms thin fibers which create a loose flexible network structure (elastic fibers). These fibers maintain cartilage strength and flexibility for joint shock absorption. The supplements of this collagen are extracted from animal cartilage sources. 

These supplements come in two forms which are undenatured (natural collagen) and hydrolysed. Hydrolysed collagen also called collagen peptides. The hydrolysis process breaks down collagen into smaller amino acid chains to create hydrolysed collagen.  

The body can absorb and utilize hydrolysed collagen more efficiently because of its processed structure. 

Key Benefits: 

Supplementing with Type 2 collagen helps maintain cartilage, protecting joints from wear and tear that can lead to discomfort. Some studies also suggest it may improve knee mobility and ease joint pain when using undenatured type 2 collagen.

Type 3 Collagen 

Type 3 collagen works together with type 1 collagen to form connective tissue structures. The substance exists in four main locations throughout the body including intestines, muscles, blood vessels and the uterus. This maintains tissue strength while supporting both skin and heart wellness. 

This collagen produces thin branching fibres which differ from the thick fibres that type 1 collagen creates. These fibres form a mesh structure. They support tissue that need both flexibility and strength. Such as blood vessels and internal organs and skin. These fibres function as a network which maintains structure while enabling tissues to move freely. 

Most type 3 collagen in supplements is derived from bovine sources and is often paired with type 1. 

Key Benefits: 

Type 3 collagen supports skin firmness and elasticity, while also contributing to the integrity of blood vessels and organ tissues. It often works in synergy with Type 1 to maintain smooth, healthy skin and overall tissue strength.

Since each type of collagen plays a distinct role in the body, choosing the right form becomes essential when targeting specific needs such as skin health or joint support, as these are the areas most people focus on.

Choosing the Best Collagen for Skin and Joints 

If your goal is glowing skin, bone health and overall support, type 1 collagen is the most versatile. It is extracted from marine and enhances skin elasticity, bone strength, and tissue healing. Type 2 collagen functions primarily to support joint flexibility and cushioning. But Type 3 collagen maintains blood vessel and organ strength and supports skin texture.  
 
That’s why Ethniq focuses on marine collagen (Type 1) as the foundation for overall health benefits, while recognizing the unique roles of other collagen types in keeping your skin, joints, and tissues strong and healthy.  

Final Thoughts 

The human body needs collagen to preserve its structural integrity and flexibility while it performs repair operations. The different collagen types unite to create the fundamental framework which supports youthful skin and flexible joints and strong tissues. 

The knowledge of various collagen types allows you to pick supplements that match your requirements instead of selecting products at random. 

The right choice of collagen types for your needs turns this fundamental protein into a powerful supplement for maintaining your health and wellness throughout time.

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