Each batch is released against an HPLC purity specification, with the exact percentage and chromatogram disclosed on the batch-specific Certificate of Analysis supplied with the order
Its molecular weight is approximately 340 Da for the tripeptide and 404 Da as the copper complex, placing it near but not comfortably below the 500 Da theoretical threshold for efficient transdermal permeation
When it binds to copper (II) ions, it forms the GHK-Cu complex, which is the biologically active form
The DSIP will dissolve on its own, producing a clear, colorless solution
0.25 mg is 5 units at the common 5 mg/mL concentration, or 10 units at a more dilute 2.5 mg/mL
GHK-Cu is supplied as a lyophilised powder with the characteristic blue colour of copper-peptide complexes and is the form of GHK most commonly used in skin-biology and cell-culture research literature