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In September 2023, the FDA added injectable GHK-Cu to a list of compounded substances considered high-risk due to limited safety data
That is the entire human dataset
Investigator-assessed improvement Finding: The blinded investigator assessed the active treatment group as showing Scale 1 improvement (2650% improvement) at the final visit, while the placebo group showed Scale 0 improvement (025%)
Most side effects from B12 shots resolve quickly, making them generally well-tolerated for routine supplementation
The injection protocols being shared on social media are largely based on anecdote and extrapolation rather than controlled trials examining skin outcomes
Research by Lv et al
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