Context:

A comprehensive review finds daily collagen supplements can modestly improve skin elasticity and hydration over time but do not prevent wrinkles, positioning collagen as a support for aging and sun-damaged skin rather than a miraculous anti-ageing fix. Across 113 trials totaling nearly 8,000 participants, benefits were credible for skin and osteoarthritis with sustained use, while quick results or universal cures were not supported. The evidence also notes natural collagen declines with age, fatiguing effects from smoking and sun exposure, and a greater loss around menopause. Different source types exist (marine, bovine, vegan), but no clear superiority emerged, and industry funding patterns call for cautious interpretation. Diet and overall skin health remain important, with nutrients like vitamin C and zinc aiding collagen production. The researchers advocate more robust dermatological studies to refine guidance.

Dive Deeper:

• The review concludes that collagen supplements can yield genuine, time-dependent gains in skin elasticity and moisture, yet they are not a rapid or universal wrinkle cure. The findings emphasize a role in holistic aging maintenance rather than an anti-wrinkle guarantee.

• Across 113 trials involving nearly 8,000 people, the evidence base suggests benefits in skin health and osteoarthritis when collagen is consumed consistently over time, with limitations on effect sizes and variability across studies.

• Age-related collagen decline is highlighted as a natural process beginning in early adulthood, accelerated by smoking and sun exposure, with a notable additional loss around menopause.

• Types of collagen studied include marine, bovine, and vegan sources; the review did not find clear evidence that one type consistently outperforms others.

• There is caution about study sponsorship, as many collagen studies are industry-funded, though the current review itself had no industry funding.

• Experts suggest reframing collagen as a supporting measure for aging and sun-damaged skin rather than an anti-ageing product; improvements in skin tone and moisture are cited as linked to a more youthful appearance.

• Dietary factors play a role, with vitamin C and zinc supporting collagen formation; vegan diets can rely on protein-derived amino acids and vegan supplements to support collagen production.