If you see sleep and energy improvements but IGF-1 has not moved, the dose may need adjustment
The combination matters because GHK-Cu (glycyl-L-histidyl-L-lysine copper) cannot permeate intact human skin
Alternative and off-label uses discussed in public literature include support for gastrointestinal lining integrity (BPC-157 is studied in animal models for gut protection), recovery after intense training, and scar appearance support (GHK-Cu is studied for collagen and wound-healing pathways)
Vitamin D, which acts through VDR, modulates renal fibrogenesis at multiple levels
Consistency is key when using glutathione for skin brightening
However, it is crucial to acknowledge that while effective, these treatments are not universally suitable for everyone