Consult a healthcare provider to determine its safety and suitability for your needs
That distinction is more important than most people realize because the Federal Food, Drug, and Cosmetic Act (FD&C Act) was designed to accomplish two important objectives
The data distribution was assessed using Anderson-Darling, DAgostino & Person, Shapiro-Wilk, and Kolmogorov-Smirnov tests
It is not an FDA-approved treatment for obesity
The copper content of GHK-Cu formulations has been a theoretical safety consideration, given that excessive copper can be toxic - however, the amounts used in cosmetic and research applications are extremely small, the copper is tightly chelated by the peptide (reducing free copper availability), and topical absorption of copper from these products appears minimal and well below levels that would cause systemic copper accumulation or toxicity
Response differences are based on baseline metabolic characteristics, diet, and comorbid disease
