topical ghk-cu cream Copper Peptide GHK-Cu Beef Tallow:

41 have shown that local cell density and initial global cell density, are able to lead to significant differences in spatial growth, proliferation, and paclitaxel-induced apoptosis rates in OVCAR8 cells, thus having a role not only in cancer cells growth but also in drug response

doi:10.1128/MCB.24.24.10941-10953.2004

Diagnostic methods The diagnosis is made by quantitative amino acid analysis of urine

Actually, you may have already used peptides without knowing it

The exact cellular signaling cascades remain under investigation, but evidence suggests involvement of pathways independent of traditional GH receptor activation