Collagen peptides (types I/III) — evidence review — Supplement & Protocol Data

Label and use

Practical details pulled from scanned or cited interventions.

Fewer or shallower wrinkles (often crow’s feet / eye-wrinkle volume).
Higher skin elasticity (cutometer R2/R5/R7).
Higher skin hydration (corneometer) and/or lower transepidermal water loss.
Higher dermal collagen density (ultrasound echogenicity).
Less OA pain (VAS, WOMAC pain).
Better OA function / stiffness (WOMAC, KOOS).
Activity-related joint comfort in athletes without radiographic OA.
Cartilage structure improvement (MRI / dGEMRIC), not just symptoms.
Greater tendon cross-sectional area and/or stiffness when combined with loading.
Higher collagen synthesis around exercise (PINP).

Dose, timing, and brands from 1 public protocol. Private and hidden usage is excluded.

Where this intervention appears and what it tends to sit beside.