Skin research
Collagen peptide absorption: what a blood test can tell us
What human blood studies reveal about collagen peptide absorption, and why circulating fragments do not automatically establish skin or joint benefits.
The SlimWithPeps reading room
Skin and copper peptides
Explore skin research with attention to the ingredient and formulation studied.
7 articles · Newest first
Skin research
Matrixyl peptides: which ingredient did the wrinkle study actually test?
Learn which peptides original Matrixyl and Matrixyl 3000 contain, what wrinkle trials tested, and how to match a cosmetic claim to its formulation.
Skin research
Argireline peptide: what the wrinkle studies do—and do not—show
Explore the human Argireline wrinkle trial, skin-penetration research and cosmetic claims, with a clear explanation of what the evidence cannot establish.
Skin research
Melanotan II side effects: what case reports can and cannot tell us
Read Melanotan II safety reports in context: serious events, uncertain risk rates, and why an apparent tanning effect does not establish product safety.
Skin research
Afamelanotide FDA approval: why Scenesse is an EPP treatment
Understand Scenesse’s approved EPP indication, the pain-free light-exposure endpoint, and why afamelanotide evidence does not establish a cosmetic tanning use.
Skin research
Collagen peptides for skin: how to read a positive trial
A closer look at a collagen-peptide skin trial: the studied formulation, measured outcomes, participant dropouts and limits of a positive result.
Skin science
GHK-Cu for skin: what copper-peptide research actually shows
A closer look at topical copper-peptide evidence, study endpoints, and why skin-care findings do not validate injections.