This record provides bibliographic details and links to the original research. An editorial study breakdown is not available.
What the researchers found
The release rate of the tetrapeptide N-acetyl-Pro-Pro-Tyr-Leu is strongly influenced by the physicochemical properties of the skin care formulation, with higher viscosity semisolids exhibiting slower peptide permeation through membranes.
Why it matters
Understanding how formulation properties affect peptide release helps optimize skin care products for better delivery and effectiveness of active peptides.
How the study worked
The study prepared different skin care formulations containing the tetrapeptide, characterized their pH, viscosity, stability, and particle size, and calculated peptide diffusion parameters using the Einstein-Smoluchowski equation. Release kinetics were investigated through membrane penetration studies to determine release rate constants.
What this study cannot tell us
The study did not specify in vivo skin penetration or clinical efficacy, and the exact study type and evidence strength were not provided.
Read the original research
The tetrapeptide N-acetyl-Pro-Pro-Tyr-Leu in skin care formulations-Physicochemical and release studies.
International journal of pharmaceutics, 492(1-2), 161-8
Citation
Olejnik, Anna; Schroeder, Grzegorz; Nowak, Izabela. (2015). The tetrapeptide N-acetyl-Pro-Pro-Tyr-Leu in skin care formulations-Physicochemical and release studies.. International journal of pharmaceutics, 492(1-2), 161-8. https://doi.org/10.1016/j.ijpharm.2015.06.050