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Remember that results vary from person to person
D.et al (2017)
Common peptide side effects may include: mild injection site irritation headaches nausea temporary fatigue However, the biggest safety concerns usually arise from unregulated peptide sources
GHK-Cu has one of the best-established safety profiles in the peptide skincare category
Peptides signal specific functions like recovery, skin, or growth hormone, while NAD supports cellular energy and repair
All existing research has been conducted in mice, with no long-term human safety trials and no established safe doses for humans
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