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In neuronal cell cultures, GHK-Cu demonstrates remarkable neuroprotective effects, reducing oxidative damage by 55% and enhancing cell survival under stress conditions by 40% compared to control administrations

Dysesthesia, an abnormal sensation often described as tingling, burning, or numbness in the skin, appeared in 8.8% of participants on the 9 mg dose and 20.9% on the 12 mg dose, compared to just 0.7% on placebo

These are what our team considers hard stops based on the current body of scientific evidence and a deep understanding of the peptide's mechanism of action

However, clinical data in humans remains limited

Recent 2026 patient cases have shown encouraging outcomes for psoriasis remission and post-operative recovery, although individual responses vary