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It has been implicated as a cause of peripheral neuropathy, subacute combined degeneration of the spinal cord, ataxia, optic atrophy, psychosis, depression, and dementia
Monitor for symptoms or allergic reactions and discontinue use if any appear
Others are investigational, compounded, or discussed in wellness settings with much less clinical evidence
References are independent peer-reviewed sources
Ann Biomed Eng
Being able to explain that GHK-Cu works WITH the skin's own signaling rather than forcing or suppressing it gives you a genuinely different conversation than "have you tried a stronger retinoid."
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