Every study we read on this question

Trials in people (16)

• An 8-week collagen trial in 70 healthy adults found shallower wrinkles and better elasticity
  Randomized trial202570 peoplePoints to benefit
• A 16-week collagen trial in 87 women: better wrinkles and density, elasticity unchanged
  Randomized trial202487 peopleMixed
• A 12-week trial of collagen in 100 adults found smoother skin and shallower wrinkles
  Randomized trial2024100 peoplePoints to benefit
• An 84-day collagen trial in 85 women found better skin density and moisture
  Randomized trial202485 peoplePoints to benefit
• A 12-week collagen trial in 100 women found better hydration, wrinkles and elasticity
  Randomized trial2023100 peoplePoints to benefit
• 12-week collagen trial in 84 adults with sun-aged skin found fewer wrinkles, better hydration
  Randomized trial202284 peoplePoints to benefit
• A 12-week no-placebo study of a collagen film in 22 women found shallower wrinkles
  Trial, not randomized202222 peoplePoints to benefit
• A 12-week collagen trial in 99 Japanese women: more moisture, no elasticity change
  Randomized trial202199 peopleMixed
• A 12-week fish collagen trial in women aged 45 to 60 found less wrinkling
  Randomized trial2021Points to benefit
• A 12-week trial of a collagen-blend drink in 72 women found better skin hydration
  Randomized trial201972 peoplePoints to benefit
• A 12-week trial of collagen in 64 adults found better skin hydration and wrinkles
  Randomized trial201864 peoplePoints to benefit
• A 90-day trial of a collagen-blend drink in 120 adults found more skin elasticity
  Randomized trial2018120 peoplePoints to benefit
• An 8-week trial of two collagens found the small-piece one improved facial skin most
  Randomized trial2016Points to benefit
• An 8-week collagen trial in 114 women aged 45 to 65 found smaller wrinkles
  Randomized trial2014114 peoplePoints to benefit
• An 8-week collagen trial in 69 women aged 35 to 55 found better elasticity
  Randomized trial201469 peoplePoints to benefit
• Two trials of collagen peptides, up to 12 weeks: better skin hydration and density
  Randomized trial2015Points to benefit

Reviews (6)

• Pooled review of 23 trials: skin benefit overall, none in high-quality or independent studies
  Pooled review (meta-analysis)20251,474 peopleMixed
• Pooled review of 10 trials, 646 people: collagen raised skin hydration and elasticity
  Pooled review (meta-analysis)2025646 peoplePoints to benefit
• Pooled review of 26 trials, 1,721 people: collagen improved skin hydration and elasticity
  Pooled review (meta-analysis)20231,721 peoplePoints to benefit
• Pooled review of 19 trials, 1,125 people: collagen improved skin hydration, elasticity and wrinkles
  Pooled review (meta-analysis)20211,125 peoplePoints to benefit
• Review of 10 publications: almost all reported skin benefits from collagen
  Systematic review2020Points to benefit
• Review of 11 trials, 805 people: collagen linked to higher skin elasticity and hydration
  Systematic review2019805 peoplePoints to benefit