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While researchers note that the LD50 (lethal dose) for GHK-Cu in murine models equates to an impossibly massive single dose of roughly 23,000mg for a 70kg human adultrendering acute lethal toxicity highly improbable at the standard aesthetic therapeutic doses of 5-50mgthe long-term cumulative effects of daily copper peptide injections remain entirely unmapped in human populations

Look for one dominant peak at the stated purity and a molecular weight that matches the target compound

BV, blood volume

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And that's exactly why a 2025 systematic review matters

[DOI] [PubMed] [Google Scholar] Motohashi H, Yamamoto M