The in vitro work that established GHK-Cus mechanistic reputation reported a collagen-synthesis effect peaking at 1 nM in cell culture, and endogenous plasma GHK sits around 200 ng/mL in young adults
doi: 10.1016/j.cellsig.2024.111282 96 SunHSunZVargheseZGuoYMoorheadJFUnwinRJet al
Wood ZA, Poole LB, Karplus PA
These cardiac repair studies established TB-500 as one of the most extensively characterised peptide research tools for studying cardiac regeneration biology and provided the foundational evidence for thymosin beta-4s role as an endogenous cardiac repair mediator and establishing that actin-sequestering peptides have biological significance beyond cytoskeletal regulation in the context of cardiac injury response
HUBERMAN: The other one that you'll hear about is called Hexarellin
A large body of research supports the compounds central role in good health as a critical regulator of oxidative stress and immune function, and key findings link high glutathione levels to longer lifespans, healthier organ function and improved markers of metabolic health