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A: Possible side effects include digestive issues, allergic reactions, and uncertainties about long-term use
Verification: Live search confirms that human plasma concentrations of GHK-Cu drop by over 60% during a standard human lifespan, falling from approximately 200 ng/mL at age 20 to 80 ng/mL by age 60
An IV drip skips the entire digestive route and places the nutrients straight into the blood circulatory system
This finding has direct implications for research protocol design: most published and structured study designs incorporate a rest period following the active phase to allow receptor sensitivity to normalize before any subsequent research cycle, rather than using continuous, uninterrupted administration
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