Now, about 'dosage' for a topical GHK-Cu serum
In very lean individuals you can actually use insulin syringes to reach the depth of the muscles if you push hard enough on the skin
What this means for you: this was a hospital population, so the percentages are far higher than in a well person having a routine check
Animal-model evidence consistently shows local effects: angiogenesis at the injury site (VEGF upregulation), growth-factor signaling (EGF, FGF), nitric oxide pathway modulation, and accelerated tendon-to-bone interface healing in rat Achilles transection studies
The bacteriostatic water provides some protection, but repeated access with imperfect sterile technique introduces cumulative contamination risk
Perhaps most intriguing is the research on doxorubicin-induced cardiotoxicity