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Built around a potent synergy of GHK-Cu copper peptides alongside Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7, this concentrated copper peptide serum is thoughtfully formulated to support the appearance of smoother, firmer, and more refined-looking skin over time

Skin types that benefit most from GHK-Cu as a retinoid alternative include rosacea-prone, post-procedure, eczema-affected, and mature skin that reacts poorly to retinol

A reference range includes the upper and lower limits of a lab test based on a group of otherwise healthy people

Tarangelo et al, 2018)

Ipamorelin appears to stand out as the paper by Raun et al