They chose peptide therapy and went looking for it, which means they had higher baseline expectations of intervention efficacy
It is produced by every cell of the body, with especially high levels in the liver
doi: 10.3389/fcell.2020.00801 Received 16 December 2019 Accepted 28 July 2020 Published 26 October 2020 Volume 8 - 2020 Edited by Zhigang Ren, First Affiliated Hospital of Zhengzhou University, China Reviewed by Vigna Elisa, University of Turin, Italy
Small EVs often exhibit an enrichment of specific lipids, including cholesterol, sphingolipids, phosphatidylserine, and ceramide, resembling the composition of membrane lipid rafts
GHK-Cu interacts with cells in ways that stimulate repair and protect against oxidative stress