copper tripeptide-1 vs ghk-cu Peptide Serum with 1% peptide, Argireline and Matrixyl 3 – Dr. Brenner Labs Palmitoyl Tripeptide Copper Tripeptide-1 (GHK-Cu)

Deep enough for collagen response, shallow enough for self-administration

Unopened vials remain stable at controlled room temperature (2025C), but once the sterile seal is broken, benzyl alcohol's preservative capacity depends entirely on cold storage to prevent bacterial colonization and maintain pH stability

TB-500 is a synthetic peptide that reproduces the biologically active region of Thymosin Beta-4 (TB4) , a naturally occurring 43-amino-acid protein found in high concentrations in platelets, wound fluid and virtually all mammalian cells

The upper end of this scale is more medical grade, whereas the lower end is the concentration youd usually find in cosmetic products