is it safe to inject ghk cu GHK-Cu Copper Peptide Injections: Advanced Skin Rejuvenation GHK-CU - Beverly Hills Rejuvenation

This is the most common comparison because both peptides share the same core sequence

Some people do find that lower doses more frequently work better for them - so I'd suggest trying it and see how you go before deciding that you need to use multiple doses administered simultaneously - particularly as the rate of lost of B12 is higher the higher the amount in your blood is

Treatment reduces circulating markers of metabolic dysfunction and inflammation, creating a more favorable metabolic environment that supports insulin sensitivity and glucose regulation

Vascular Endothelial Growth Factor | Rupa Health

Both peptides appear well tolerated in the limited settings studied, but long-term systemic human safety is uncharacterized for each, and research-grade material carries unverified identity and purity

Renew Sustain Energy Rev 170:112965 Cao Z et al (2022b) Highly dispersed RuO 2 -biomass carbon composite made by immobilization of ruthenium and dissolution of coconut meat with octyl ammonium salicylate ionic liquid for high performance flexible supercapacitor