3mg ghk cu daily GHK-Cu Dosage and Protocol: A Medical Provider's Guide to the 30-Day Cycle GHK-CU - 100mg (Copper Peptide)
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[DOI] [PMC free article] [PubMed] [Google Scholar] 7.Franceschini F., Bottau P., Caimmi S., Cardinale F., Crisafulli G., Liotti L., Saretta F., Bernardini R., Mori F., Caffarelli C

The Sub-picomolar Cu(2+) Dissociation Constant of Human Serum Albumin

Short answer: It appears tolerable in very limited early human data, but there is not enough evidence to call it safe for general use
The US Navy wrote that the LPD 29 will sail for equipment, troops, and supply transport on various military operations
