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The structural difference is a single amino acid substitution at the first position: GHK-Cu uses glycine (Gly-His-Lys:Cu), while AHK-Cu uses alanine (Ala-His-Lys:Cu)
During treatment, reduce or eliminate activities that aggravate your symptoms
What works optimally for one person may require adjustment for another
study, effects in fast-aging mice were observable within 10-14 days of treatment initiation
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