ghk-cu levels decline with age ng/ml vs AHK-Cu: Which Copper Peptide Is More Effective? GHK-Cu has a big reputation.

Fulurija A, Lutz TA, Sladko K, Osto M, Wielinga PY, Bachmann MF, et al

Due to the limited data, it should be avoided by anyone who is pregnant, breastfeeding, or undergoing active cancer treatment

And its generally considered safe for humans to take

Despite the lack of extra support for lifestyle modification as part of the SURPASS program, 4069% of patients achieved 10% weight loss with the highest doses of tirzepatide (1015 mg), which ranged from 9.5 kg to 12.9 kg [100]

PubMed Kannengiesser, K., Maaser, C., Heidemann, J., Luegering, A., Ross, M., Brzoska, T., Bohm, M., Luger, T.A., Domschke, W., Kucharzik, T

The main preclinical models used in research on regenerative peptides include: Angiogenesis is the formation of new blood vessels from pre-existing ones