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
However, this is likely an underrepresentation due to the fact that Autism is often undiagnosed in women (Westwood and Tchanturia)
J Cell Biochem 118:924933
One Size Ingredients L-glutathione, microcrystalline cellulose plant shell Safety Warning The indicated daily dose should not be exceeded
With trends toward delayed fatherhood, increased environmental exposures, and changing lifestyle factors, there is a pressing need to reframe male fertility as a long term health issue