ghk-cu levels decline with age Meet GHK-Cu. The ingredient your skin has been waiting for 🧪, Copper peptide is bioidentical to compounds your skin naturally produces and as age, so does collagen, elasticity, and ghk cu plasma levels age

Options for managing tolerance include a brief dose reduction for 4 to 8 weeks ("drug holiday" at a lower dose, not complete cessation), lifestyle optimization to maximize the medication effect, evaluation for other contributing factors (thyroid function, cortisol, sleep quality, medication interactions), and consideration of adding a complementary compound to address specific aspects of the plateau

Layering Considerations: If combining with other research compounds, consider alternating application times (e.g., GHK-Cu in the morning, retinoids at night) or alternating days to avoid overwhelming the skin

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Methylcobalamin is a naturally occurring form that is readily active upon administration

PMCID: PMC3533412