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The body manufactures thousands of them every day to send signals between tissues
Published evidence is narrower: topical skin and wound studies exist, hair claims are more indirect, and FDA materials caution that injectable GHK-Cu has limited human safety data [2], [3], [8]
Researchers should review all other medications being used and seek medical guidance if needed
These may include headaches, dizziness, and gastrointestinal issues like nausea or stomach pain
Skin Health, Skin Elasticity, and Aging Skin Concerns A review of topical anti-aging peptide studies reported that Cu-GHK formulations were associated with improved visible signs of aged and sun-damaged skin, including skin density, thickness, elasticity, humidity, and wrinkle appearance in 12-week studies involving 71 or 41 women [2]
