GHK-Cu is the copper tripeptide most studied for hair — it's involved in dermal-papilla and follicle research and appears in many topical hair formulas.
GH-axis compounds (CJC-1295 + Ipamorelin) are sometimes discussed for tissue and follicle support, and the healing peptides for scalp tissue research. These are different mechanisms, so combinations are framed via the stacking guide.
GHK-Cu ships in large vials, so compare on cost-per-mg. PepsTracker tracks it across 26 vendors. Platinum Peptides carries it, 15% off with pepstracker15.
GHK-Cu (a copper tripeptide) is the most-studied peptide for hair, involved in dermal-papilla and follicle research. It is sold for research use only.
GHK-Cu is studied in follicle and hair-research contexts and appears in many topical formulas, but it is a research chemical, not an approved hair treatment.
Compare on cost-per-milligram, especially for GHK-Cu which ships in large vials. PepsTracker normalizes prices across 26 vendors.