Retatrutide is a synthetic peptide based on a glucose-dependent insulinotropic polypeptide (GIP) backbone, but uniquely, it functions as a triple agonist
Research has demonstrated that GHK-Cu stimulates hair follicle cell proliferation, increases production of vascular endothelial growth factor (VEGF) to support follicular blood supply, modulates the follicular growth cycle from resting (telogen) phase to active growth (anagen) phase, and reduces perifolicular inflammation
PMID 34855918
IV delivery achieves near 100% bioavailability and is the clinically effective route when significant replenishment is the goal
(PubMed) Khalili M, Soltani M, Moghadam SA, Dehghan P, Azimi A, Abbaszadeh O
This will preserve glutathione levels in your body