We prefer subcutaneous, because it is painless, effective, very easy to do by yourself, and carries no risk of nerve injury
The temptation to escalate the dose because nothing is happening yet is exactly the mistake the timeline section is designed to head off the mechanism is cumulative, not dose-chased
169 KimNLannanKLThatcherTHPollockSJWoellerCFPhippsRP
doi.org/10.1038/newbio243085a0 Pickart, L., et al
Chemical testing measures purity levels, drying loss, ash content, and solvent residues, confirming that the Copper Peptide Ghk Cu Powder meets cosmetic-grade specifications suitable for personal care applications