ghk-cu naturally occurring declines with age Frontiers Regenerative peptides: complete guide to
Description
The effect was repeatedly obtained after a second or third application 24-48 hours thereafter

References Saurat, J.-H., Halioua, B., Baissac, C., Cullell, N

47.Pickart L., Vasquez-Soltero J.M., Margolina A

This makes sense given their mechanism