Skin and joints seem like very different reasons for taking a supplement.
Biologically, however, they share something important: collagen is a major structural protein in connective tissue.
That’s why research into hydrolysed collagen spans seemingly unrelated areas.
For skin, systematic reviews have repeatedly reported encouraging results for hydration and elasticity. A 2023 meta-analysis of 26 randomised controlled trials found statistically significant improvements in both measures compared with placebo.
Joint research is also substantial.
A systematic review focused on collagen and exercise found the most consistent findings around joint functionality and joint discomfort, while more recent reviews continue to report promising outcomes.
That doesn’t mean every collagen powder will produce every outcome reported in every study.
Different studies use different collagen sources, peptide profiles, doses, populations and durations.
That’s why it’s better to say the body of research consistently suggests potential applications for skin and connective tissue rather than claiming guaranteed results.
It’s a less dramatic message.
It’s also much closer to what the evidence actually says.