GHK-Cu, short for Gly-His-Lys-Copper, is a small peptide naturally present in the human body
Semaglutide is the most common comparison
These include both immune-stimulating and immune-suppressing peptides, depending on the therapeutic application
In general, HSP70 is induced by diversified stimuli such as hypoxia, acidosis, increased muscle temperature, and ischaemia-reperfusion, most of them are by-products of resistance exercise associated with elevated levels of metabolic stress [30, 89]
The peptide may have degraded before or during reconstitution
IL-33 has been shown to stimulate melanin biosynthesis in NHEM by promoting phosphorylation of p38 MAPK and CREB, leading to increased expression of TYR, TRP-1, and DCT through MITF, ultimately resulting in increased melanin production (Zhou et al., 2014)