They point to related mechanisms that may matter together in the same experimental environment
Based on practitioner reports and patient experience (not controlled clinical trials, which do not yet exist for IGF-1 LR3 in humans): Individual results vary based on training consistency, nutrition, dosing, genetics, and baseline fitness level
Even experienced copper peptide users benefit from introducing 4% products slowly, perhaps every other day initially, then building to daily use as skin demonstrates consistent positive response without signs of irritation or sensitivity
The most common mistake isn't contamination
10.1111/acer.13765 19 EdwardsJ
Research shows that GHK-Cu helps stimulate collagen production, while also helping regulate the enzymes that break collagen down