What Are the Different Types of Collagen?

Collagen is one of the most abundant proteins in the human body. It plays a structural role in many tissues including skin, bones, muscles, tendons, ligaments, and connective tissues.

Scientists have identified at least 16 different types of collagen, each serving different roles throughout the body. However, a few types are far more common than others.

The Most Common Types of Collagen

Collagen Type I
This is the most abundant form of collagen in the body. It is found in skin, tendons, ligaments, and bones. Type I collagen helps provide structure and strength to many tissues.

Collagen Type II
Type II collagen is primarily found in cartilage and connective tissues. It plays an important role in supporting the structure of joints.

Collagen Type III
Often found alongside Type I collagen, Type III is present in skin, blood vessels, and certain organs. It contributes to the structure and elasticity of tissues.

Collagen Type IV
Type IV collagen is involved in forming layers that help support tissues within organs, including parts of the digestive and respiratory systems.

Collagen Type V
This type of collagen supports the formation of certain tissues including hair and parts of the placenta.

Collagen Type X
Type X collagen plays a role in the process of bone formation.

Why Do These Types Matter?

Different types of collagen exist throughout the body because different tissues require different structural properties. Together, these collagen types contribute to the body's connective tissue framework.

Many collagen supplements focus primarily on Type I and Type III collagen, which are among the most abundant forms found in the body.