The most abundant protein in your body — structure for skin, joints, and connective tissue.
Collagen
Why it matters
Production declines with age; it sits at the intersection of skincare and joint health.
In practice
Protein intake, vitamin C, and sun protection support your natural collagen.
Related terms
Healthy aging, Elastin
Definitions in the Knowledge A–Z are general education, not medical advice. They do not diagnose or treat any condition. Speak to a qualified professional about anything specific to you.