Collagen is one of the most important proteins in the human body, playing a key role in skin, hair, joints, and overall tissue strength. While many people talk about collagen as one ingredient, there are actually several different types, each serving a specific function in the body.
Understanding these differences helps explain why collagen is widely used for beauty and wellness support.
Type I Collagen
Type I is the most abundant collagen in the body. It is found mainly in:
- Skin
- Hair and nails
- Bones and tendons
This type is strongly associated with skin firmness, elasticity, and overall strength. Marine collagen is naturally rich in Type I collagen, which is why it is often linked to skin and beauty benefits.
Type II Collagen
Type II collagen is found primarily in cartilage.
Its main role is supporting:
- Joint health
- Cushioning between bones
- Smooth movement
This type is commonly associated with joint-focused supplements rather than beauty-related products.
Type III Collagen
Type III collagen works closely with Type I and is found in:
- Skin
- Blood vessels
- Internal organs
It helps support skin structure and elasticity, especially in younger skin. Together, Types I and III contribute to a smoother, more youthful-looking appearance.
Type IV Collagen
Type IV collagen plays a structural role in the body.
It is found in the layers that support cells and tissues and helps maintain healthy tissue structure. While important, it is less commonly discussed in beauty supplements.
Type V Collagen
Type V collagen supports the formation of collagen fibers and is found in:
- Hair tissue
- Placenta
- Cell surfaces
It plays a supporting role in maintaining healthy tissue organization.
Which Collagen Type Is Best for Beauty?
For skin, hair, and nails, Type I collagen is the most relevant, followed by Type III. This is why marine collagen, known for its high concentration of Type I collagen and high absorption rate, is often chosen for beauty-from-within routines.