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Compound 30 encompassing a homo tyrosine in a 14-membered macrocycle and with a trans double bond provided the lowest Ki value in the series, 1.8 nM, while the corresponding tyrosine analogues with the 13-membered ring system exhibited a Ki value of 50 nM

However, there are several factors to consider when determining the appropriate amount for individual needs: 1

Standard Cycling Recommendations: Initial cycle: 30 days of daily administration followed by 30 days washout period Alternative protocol: 4-6 weeks on, followed by a 2-4 week break Long-term usage: May repeat cycles as needed based on response assessment Expectations for Results: Initial improvements may be observed within weeks Full benefits typically require consistent use for up to three months Maintenance protocols may be developed after initial treatment cycles Safety Considerations and Precautions While GHK-Cu has shown promise in various applications, several safety considerations should be noted: General Precautions: Copper peptides may not be approved for therapeutic use without prescription in all regions

Sintzel, M.B., M