Regenerative properties of the NL GHK Cu peptide and skin appearance Synthagen PL Unlock the secret to ageless skin and cellular rejuvenation with GHK CU peptide! Often referred to as the "holy grail" of skincare, GHK CU is a naturally occurring copper peptide that works wonders GHK Cu (copper peptide) is a science backed anti aging compound that supports collagen production, skin regeneration, and overall skin health. Used in both topical serums and subcutaneous Peptide Therapy & GHK Cu Regenerative Cream Calibrate IV Calibrate Hydration