GHK-Cu is the most-studied skin peptide, a copper tripeptide involved in extracellular-matrix remodeling (collagen/elastin signaling). It appears in both topical cosmetic formulas and research powders.
GLOW combines GHK-Cu with the BPC-157 + TB-500 healing pair — three complementary repair mechanisms in one blend. KLOW adds KPV for anti-inflammatory action. See the stacking guide.
Epithalon is studied in telomerase/longevity research rather than topical skin, but it's frequently grouped in anti-aging discussions.
GHK-Cu ships in large vials, so cost-per-mg varies widely. PepsTracker compares GHK-Cu, GLOW, KLOW and Epithalon across 26 vendors with codes applied. Platinum Peptides carries them, 15% off with pepstracker15.
GHK-Cu (a copper tripeptide) is the most-studied skin peptide, involved in collagen and elastin signaling. It appears in the GLOW and KLOW blends alongside BPC-157 and TB-500. Research use only.
GLOW combines GHK-Cu with BPC-157 and TB-500 — three complementary tissue-repair mechanisms. KLOW adds KPV for anti-inflammatory action.
Compare on cost-per-milligram, especially for GHK-Cu which ships in large 50 to 100 mg vials. PepsTracker normalizes prices across 26 vendors with discount codes.