I ordered from a few companies and this was by far the best
doi: 10.1016/S0928-4257(97)89480-6
The evidence base is expanding steadily: a 2024 review in the International Journal of Molecular Sciences as well as a 2025 systematic review in the Journal of Cosmetic Dermatology both reported consistent improvements in fine lines, tone and elasticity, with minimal and short lived side-effects
Key Benefits of Our GHK-Cu Hair Mask: Deeply Repairs Damaged Hair: The masks intensive formula works to repair split ends, breakage, and damage caused by heat styling, coloring, and chemical treatments
Peptide Overview DSIP, commonly referred to as Delta Sleep-Inducing Peptide within scientific literature, is a synthetic peptide studied in laboratory settings investigating peptide-mediated signalling systems and neurochemical interaction pathways