ghk-cu endogenous levels decline with age Copper Peptide Regeneration Review (2018) — Research Summary The naturally occurring peptide GHK

This property allows BPC 157 to be absorbed and used in lab tests

They play a vital role in cellular metabolism, DNA synthesis and maintenance of a healthy immune system

This heals old, damaged skin tissues and replaces them with fresh cells

[9] Unopened vials of Bacteriostatic Water for Injection have a long shelf life, usually on the order of 2-3 years from the date of manufacture (check the expiration date on the vial)

Physical dependence was also postponed, with withdrawal severity (assessed via isoniazid 800 mg/kg challenge) attenuated in BPC-157 groups

Again, I don't think it's an overestimate to say that there are probably hundreds of thousands of different peptides, each with multiple and sometimes even overlapping and synergistic effects