A re-analysis of existing meta-analyses and primary studies on oral collagen supplementation for skin aging found no evidence of benefit. The researchers reported inaccurate data and inappropriate measure combinations in prior analyses.
Source: Pooled analysis of studies, Data from existing human studies on oral collagen supplementation. It combines earlier studies, so its strength depends on the studies it pooled.
What was found
Researchers re-analyzed existing meta-analyses and primary studies on oral collagen supplementation for skin aging. They found inaccurate reporting of data from primary studies and inappropriate combinations of measures in the prior meta-analyses.
A new meta-regression, which accounted for dose variations in the primary studies, found no evidence of benefit from collagen supplementation for skin aging. This finding contrasts with the reported results from the prior meta-analyses.
How it was done
The researchers investigated and appraised the methodology of existing meta-analyses on collagen supplementation. They then performed a meta-regression of the constituent collagen studies, accounting for cumulative dose effects.
What it does not show
This re-analysis focused on existing studies and meta-analyses, not new primary research. It does not include new human trials on collagen supplementation.
What happens next
The researchers stated that evidence synthesis for collagen studies needs a stronger methodological underpinning for results to be clinically relevant.
Who was talking about it
- ScienceAlert on the news (2026-10-06): ScienceAlert reported that scientists found major flaws in the research behind collagen supplements. See the post
The source
This is news, reported from the source above. It is not medical advice and not a recommendation. Talk to your doctor or pharmacist before you change any medicine or supplement.