Description
Collagen is the most abundant protein in your body, providing structure and support to tissues like skin, bones, cartilage, and blood vessels. There are dozens of collagen types, but Types I, II and III are the ones most commonly used in supplements because of their roles in connective-tissue health:
Type I Collagen
Where it’s found: Skin, bones, tendons, ligaments, and other connective tissues.
What it does: Supports skin elasticity & hydration, nail and hair health, and overall structural strength.
Most common in marine and bovine collagen.
Type II Collagen
Where it’s found: Cartilage and joints (especially cartilage cushioning).
What it does: Helps joint comfort, cartilage integrity, mobility and flexibility—often used for joint-focused formulas.
Usually sourced from chicken cartilage.
Type III Collagen
Where it’s found: Skin, blood vessels, organs, and muscles.
What it does: Works closely with Type I to support tissue elasticity, skin firmness, gut health and vascular structure.
Commonly included with Type I in bovine-derived collagen.
Supplements often combine Types I & III together (especially for beauty, skin and general connective-tissue support) and include Type II when joint health is a priority.
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