In 2015 a study published by the Journal of Cosmetic Dermatology
Oral collagen peptide supplementation significantly increased skin hydration after 8 weeks of intake.
The collagen density in the dermis significantly increased and the fragmentation of the dermal collagen network significantly decreased already after 4 weeks of supplementation.
Both effects persisted after 12 weeks. Ex vivo experiments demonstrated that collagen peptides induce collagen as well as glycosaminoglycan production, offering a mechanistic explanation for the observed clinical effects.
Conclusion
The oral supplementation with collagen peptides is efficacious to improve hallmarks of skin aging.
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