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Why GHK-Cu Stands Out Among Peptides Among the many peptides used in skincare, GHK-Cu remains a standout due to its multifunctional biological activity and proven clinical benefits
For example, one study in chronic insomniac patients used intravenous DSIP at 25 nmol/kg and found higher sleep efficiency, shorter sleep latency
Nitric oxide and macrophage function
The FDA issued a safety alert in April 2025 noting 32 adverse event reports (20192024) including erectile dysfunction, depression, and suicidal ideation
Guzel-Seydim et al., 2021)
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