| Type I (most abundant) |
Skin, bones, tendons, ligaments, blood vessels, organs, eyes, hair and nails. |
Accounts for over 90% of the body's collagen. Provides tensile strength and structural integrity. |
| Type II |
Cartilage and the eyes. |
The primary collagen of joint cushioning and impact absorption. |
| Type III |
Connective tissue and blood vessels, often alongside Type I. |
Supports skin elasticity and vascular health. |
| Type IV |
Basement membranes surrounding cells and tissues. |
Provides filtration and structural support at the cellular level. |
| Type V |
Hair, skin and cell surfaces. |
Regulates the formation and organisation of collagen fibres. |
